Document:

EX-10.2

 Exhibit 10.2 

INVESTMENT AGREEMENT 

This Investment Agreement (this “Agreement”) is made as of December 29, 2016 (the “Effective
Date”), by and among Southcross Energy Partners, L.P., a Delaware limited partnership (“SXE”), Southcross Holdings LP, a Delaware limited partnership (“Southcross Holdings”), and Wells
Fargo Bank, N.A., as administrative agent under the SXE Revolving Credit Agreement (as defined below) (the “Administrative Agent”). SXE, Southcross Holdings, and the Administrative Agent are sometimes referred to herein
individually as a “Party” and collectively as the “Parties.” 
 WHEREAS, SXE is party to
that certain Third Amended and Restated Revolving Credit Agreement, dated as of August 4, 2014, among SXE, as borrower, the Administrative Agent, and the lenders party thereto (as amended prior to the Effective Date, the
“Existing SXE Revolving Credit Agreement”); 
 WHEREAS, on the Effective Date, SXE, the Administrative
Agent and certain lenders constituting Required Lenders are entering into that certain Waiver and Fifth Amendment to Third Amended and Restated Revolving Credit Agreement (the “Waiver and Fifth Amendment”), pursuant to which
the SXE Revolving Credit Agreement is being amended and certain defaults thereunder are being waived (the Existing SXE Revolving Credit Agreement as amended by such Waiver and Fifth Amendment, the “SXE Revolving Credit
Agreement”; capitalized terms used herein and not otherwise defined shall have the meaning given to such terms in the SXE Revolving Credit Agreement as of the Effective Date); 

WHEREAS, on the Effective Date, as a condition precedent to the Waiver and Fifth Amendment, Southcross Holdings is investing $17,000,000 (the
“Initial Investment”) pursuant to, and on the terms described in, that certain Equity Cure Contribution Agreement, dated as of March 17, 2016 as amended by the First Amendment to Equity Cure Contribution Agreement dated
as of the Effective Date (as amended, the “Existing Contribution Agreement”), which Initial Investment shall not constitute an Equity Cure Contribution under the SXE Revolving Credit Agreement; 

WHEREAS, in connection with, and as a condition precedent to, the Waiver and Fifth Amendment, Southcross Holdings is willing to agree to an
additional investment of up to $15,000,000 in SXE subject to, and on the terms, set forth herein, and SXE is willing to issue on account of that investment up to $15,000,000 of debt or equity securities, as applicable, on the terms set forth herein;

 WHEREAS, the Conflicts Committee (the “Conflicts Committee”) of the Board of Directors (the
“SXE Board”) of Southcross Energy Partners GP, LLC, a Delaware limited liability company (the “SXE General Partner”), has (a) determined that (i) this Agreement
and the transactions contemplated herein are in the best interests of the Partnership Group (as such term is defined under the SXE Partnership Agreement), and (ii) this Agreement and the transactions contemplated herein are fair and reasonable
to SXE; and (b) recommended that the Board approve this Agreement and the transactions contemplated herein; 

 WHEREAS, the Board of Directors (the “Holdings Board”) of
Southcross Holdings GP LLC, a Delaware limited liability company (the “Holdings General Partner”), has determined that (i) this Agreement and the transactions contemplated herein are in the best interests
of the Southcross Holdings, and (ii) this Agreement and the transactions contemplated herein are fair and reasonable to Southcross Holdings; and 

WHEREAS, each of the SXE Board and the Holdings Board has approved this Agreement and the transactions contemplated herein; 

NOW, THEREFORE, in consideration of the foregoing recitals and the mutual agreements, covenants, representations and warranties set forth
herein, the Parties hereby agree as follows: 
 ARTICLE I 

INVESTMENT COMMITMENTS 

1.1    Certain Definitions 

(a)    “Committed Amount” means, as of any date of determination, $15,000,000
less (i) all amounts previously directly invested in SXE by Southcross Holdings pursuant to this Agreement as of such date, (ii) all amounts previously invested by any Sponsor pursuant to the Backstop Investment Commitment Letter
(including pursuant to the provisions of Sections 2.2 and 2.3) as of such date and actually received by SXE and (iii) all other amounts invested in SXE by Sponsor or Southcross Holdings after the Effective Date as of such date;
provided, that (x) such other amounts are either invested as equity that does not constitute Disqualified Capital Stock or are invested in exchange for Qualifying Notes and (y) such amounts do not constitute an Equity Cure
Contribution. 
 (b)    “Credit Event” means the occurrence and continuance of
any of the following events: (i) a proceeding shall have been commenced or a petition shall have been filed seeking (x) liquidation, reorganization or other relief in respect of Southcross Holdings or its debts, or of a substantial part of
its assets, under any Federal, state or foreign bankruptcy, insolvency, receivership or similar law now or hereafter in effect or (y) the appointment of a receiver, trustee, custodian, sequestrator, conservator or similar official for
Southcross Holdings or for a substantial part of its assets or (ii) a Governmental Requirement or contractual requirement shall then be in effect that prohibits or restrains Southcross Holdings from making a Qualified Investment or otherwise
from performing its obligations under this Agreement. 
 (c)     “EIG Funding
Entities” means, collectively, EIG Energy Fund XV (Cayman), L.P., EIG Energy Fund XV-B, L.P., EIG Energy Fund XV-A, L.P., EIG Energy Fund XV, L.P., EIG
Energy Fund XIV (Cayman), L.P., EIG Energy Fund XIV-B, L.P., EIG Energy Fund XIV-A, L.P., and EIG Energy Fund XIV, L.P. 

(d)    “Full Investment Trigger” means the earliest to occur of
(i) December 31, 2017, (ii) an Event of Default (iii) any default or breach by Southcross Holdings under this Agreement and (iv) any default or breach by any Sponsor under the Backstop Investment Commitment Letter. 

  
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 (e)    “Investment Amount” means, in
each case, the total amount of the Committed Amount that Southcross Holdings is required to contribute as a Qualifying Investment pursuant to Section 1.2(a) or (b), as applicable. 

(f)    “Investment Date” means, in each case, the Business Day in the three
(3) Business Day period after receiving an Investment Notice on which Southcross Holdings elects to consummate a Qualifying Investment in SXE. 

(g)    “Investment Notice” means a valid written notice of a Full Investment
Trigger or a Partial Investment Trigger delivered pursuant to Section 1.2(a) or (b), respectively. 

(h)     “Partial Investment Trigger” means the occurrence of the Liquidity
(calculated as an average of the previous five Business Days) of the Borrower and the other Loan Parties, taken as a whole, as of the last Business Day of any calendar week being less than $3,500,000. 

(i)    “Qualifying Investment” means an investment which meets the requirements of
Article II of this Agreement. 
 (j)    “Qualifying Investment Securities” means
Qualifying Units or Qualifying Notes. 
 (k)    “Qualifying Investment Securities
Election” means the election of Southcross Holdings or the applicable Sponsor of the Qualifying Investment Securities it shall receive on the applicable Investment Date (which may be in any combination of Qualifying Notes or Qualifying
Units) in exchange for the applicable Investment Amount funded by such electing person; provided that the combined issue price (for Qualifying Units) and face amount (for Qualifying Notes) shall not exceed the amount funded by such electing
person on such Investment Date. 
 (l)    “Qualifying Notes” means notes which
(i) bear interest at rate of 12.5% per annum, payable on the last Business Day of each fiscal quarter of SXE (A) prior to December 31, 2018, in kind and (B) on or after December 31, 2018, in cash but only to the extent
necessary for SXE to comply with the limitation on Indebtedness set forth in Section 9.02(k) of the SXE Revolving Credit Agreement; provided, that all interest paid in kind on all outstanding Qualifying Notes shall be subject to an overall
cap of $3,000,000, (ii) are expressly subordinated in right of payment to the Secured Obligations on terms reasonably acceptable to the Administrative Agent and are otherwise senior unsecured obligations of SXE, (iii) contain no
(A) covenants or events of default which, when taken as whole are more restrictive than the covenants and events of default in the SXE Revolving Credit Agreement as of the Effective Date as determined by the Administrative Agent in its
reasonable discretion and (B) financial covenants, (iv) mature on or after November 5, 2019, and (v) are in an initial face amount equal to the applicable Investment Amount allocated to Qualifying Notes by Southcross Holdings on
the applicable Investment Date pursuant to Section 2.1(a). 

  
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 (m)    “Qualifying Units” means
Common Units (used herein as such term is defined in the Partnership Agreement of SXE) with an issue price equal to either (i) if the Common Units of SXE are listed on a national stock exchange, 93% of the volume weighted average price of such
Common Units for the twenty (20) day period immediately preceding the Investment Date or (ii) if the Common Units of SXE are not listed on a national stock exchange, the fair market value of such Common Units as reasonably agreed by SXE
and Southcross Holdings and which do not constitute Disqualified Capital Stock. 

(n)    “Sponsor” has the meaning given to such term in the Backstop Investment
Commitment Letter. 
 (o)    “TW Funding Entities” means, collectively, TW BBTS
Aggregator LP, TW Southcross Sidecar II LP, and TW Southcross Sidecar II(N-QP) LP. 

1.2    Investment Obligations. 

(a)    Upon the receipt by Southcross Holdings of a valid written notice from SXE (or the Administrative
Agent on behalf of SXE) of a Full Investment Trigger, Southcross Holdings shall, within three (3) Business Days (provided that such period shall be extended to thirteen (13) Business Days after the date of delivery of such notice if
Southcross Holdings issues a valid Backstop Demand pursuant to Section 2.2), make a Qualifying Investment in SXE in an aggregate amount equal to the Committed Amount as of the date of such notice. 

(b)    Upon the receipt by Southcross Holdings of valid written notice from SXE (or the Administrative
Agent on behalf of SXE) of a Partial Investment Trigger, Southcross Holdings shall, within three (3) Business Days (provided that such period shall be extended to thirteen (13) Business Days after the date of delivery of such notice if
Southcross Holdings issues a valid Backstop Demand pursuant to Section 2.2), make a Qualifying Investment in SXE in an aggregate amount equal to the lesser of (i) the amount necessary to increase the Liquidity of the
Borrower and the other Loan Parties up to $3,500,000 after giving pro forma effect to such Qualifying Investment and (ii) the Committed Amount as of the date of such notice; provided, that any Qualifying Investment made pursuant to this
Section 1.2(b) shall be in a minimum amount equal to the lesser of (i) $2,000,000 and (ii) the Committed Amount as of the date of such notice. To be valid, any notice of a Partial Investment Trigger shall include a reasonably detailed
calculation of the minimum size of the Qualifying Investment necessary to satisfy this Section 1.2(b). 

(c)    For the avoidance of doubt, and notwithstanding anything in this Agreement to the contrary,
Southcross Holdings’ aggregate funding obligations under this Agreement, and any guarantee or backstop thereof, shall not exceed $15,000,000. 

  
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 (d)    For the avoidance of doubt, no amounts contributed by
Southcross Holdings or any Sponsor hereunder in exchange for Qualifying Units shall constitute an Equity Cure Contribution. 

(e)    SXE shall deliver a copy of each Investment Notice to the Administrative Agent and each Sponsor
concurrently with delivery thereof to Southcross Holdings. 
 1.3    Representations and Warranties of Southcross
Holdings. Southcross Holdings hereby represents and warrants that the following statements are correct and complete: 

(a)    All securities acquired by Southcross Holdings hereunder will be acquired for Southcross
Holdings’ own account as an investment without the present intent to sell, transfer or otherwise distribute the same to any other Person in violation of any state or federal securities laws, rules or regulations. Southcross Holdings
acknowledges that any securities acquired by it hereunder will not be registered pursuant to the Securities Act of 1933, as amended (the “1933 Act”), and that none of such securities may be transferred, except pursuant to an
effective registration statement or an applicable exemption from registration under the 1933 Act. Southcross Holdings is an “accredited investor” as defined under Rule 501 promulgated under the 1933 Act. 

(b)    Southcross Holdings acknowledges that it can bear the economic risk of its investment in the
securities to be acquired hereunder indefinitely, and has such knowledge and experience in financial and business matters that it is capable of evaluating the merits and risks of an investment in such securities. 

(c)    Southcross Holdings has the requisite limited partnership power and authority to execute, deliver
and perform its obligations under this Agreement, and this Agreement and the transactions contemplated hereby have been duly authorized by all necessary limited partnership action. This Agreement has been duly executed and delivered by Southcross
Holdings and constitutes a valid and binding agreement of Southcross Holdings (assuming the due execution and delivery of this Agreement by, or on behalf of, SXE), enforceable against it in accordance with its terms. 

(d)    The execution, delivery and performance by Southcross Holdings of this Agreement and the
consummation of the transactions contemplated hereby do not and will not (with or without the giving of notice, the lapse of time, or both) result in a violation or breach of, conflict with, cause increased liability or fees, or require approval,
consent or authorization under (i) any law, rule or regulation applicable to Southcross Holdings, (ii) any contract to which Southcross Holdings is a party or by which Southcross Holdings or any of Southcross Holdings’ properties or
assets may be bound or affected or (iii) any of Southcross Holdings’ organizational and governing documents. 

1.4    Representations and Warranties of SXE. SXE hereby represents and warrants that the following
statements are correct and complete: 
 (a)    All securities acquired by Southcross Holdings hereunder
are duly authorized and, when issued in accordance herewith, will be validly issued and, to the extent applicable, fully paid and non-assessable. 

  
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 (b)    SXE has the requisite limited partnership power and
authority to execute, deliver and perform its obligations under this Agreement, and this Agreement and the transactions contemplated hereby have been duly authorized by all necessary limited partnership action. This Agreement has been duly executed
and delivered by SXE and constitutes a valid and binding agreement of SXE (assuming the due execution and delivery of this Agreement by, or on behalf of, Southcross Holdings), enforceable against it in accordance with its terms. 

(c)    The execution, delivery and performance by SXE of this Agreement and the consummation of the
transactions contemplated hereby do not and will not (with or without the giving of notice, the lapse of time, or both) result in a violation or breach of, conflict with, cause increased liability or fees, or require approval, consent or
authorization under (i) any law, rule or regulation applicable to SXE, (ii) any contract to which SXE is a party or by which SXE or any of SXE’s properties or assets may be bound or affected or (iii) any of SXE’s
organizational and governing documents. 
 ARTICLE II 

FORM OF INVESTMENT 

2.1    Qualifying Investment. On each Investment Date, Southcross Holdings shall (a) inform SXE of its
Qualifying Investment Securities Election and (b) contribute the applicable Investment Amount to SXE by wire transfer of immediately available funds. Upon receipt of the applicable Investment Amount, SXE shall issue the applicable Qualifying
Investment Securities to Southcross Holdings corresponding to its Qualifying Investment Securities Election. 

2.2    Substitution by Sponsor. If and only if, after it receives an Investment Notice, Southcross
Holdings’ cash on hand is less than the applicable Investment Amount required to be contributed by Southcross Holdings on the applicable Investment Date, Southcross Holdings shall, within 1 calendar day, issue a written demand (a
“Backstop Demand”) under the Backstop Investment Commitment Letter for each Sponsor to fund their respective pro-rata portions of the shortfall (or such larger amount as the Sponsors
party to the Backstop Investment Commitment Letter unanimously agree in their respective sole discretion), which such demand shall specify the shortfall amount with reasonably detailed supporting calculations (each a “Sponsor Shortfall
Amount”); provided that, notwithstanding anything in this Agreement to the contrary, either of the Administrative Agent or SXE may issue a Backstop Demand if Southcross Holdings fails to fund all or any portion of the applicable
Investment Amount required to be contributed by Southcross Holdings on the applicable Investment Date, in which case the Sponsor Shortfall Amount shall be the amount that Southcross Holdings fails to fund. Each Sponsor may elect, in its sole
discretion and in lieu of contributing such Sponsor Shortfall Amount to Southcross Holdings (which such contribution is subject to the terms and conditions of the limited partnership agreement of Southcross Holdings), to fund its Sponsor Shortfall
Amount directly to SXE as a Qualifying Investment, in which case, on the Investment Date, such Sponsor shall (a) make a Qualifying Investment Securities Election and (b) contribute the applicable Sponsor Shortfall Amount to SXE by wire
transfer of immediately available funds, and SXE shall issue to such Sponsor Qualifying Investment Securities corresponding to such Sponsor’s Qualifying Investment Securities Election; provided, that if a Credit Event shall have occurred
and be continuing on the date of the applicable Full Investment Trigger or Partial Investment Trigger, as 

  
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the case may be, each Sponsor shall fund its Sponsor Shortfall Amount directly to SXE as a Qualifying Investment as set forth in this sentence and may not fund its Sponsor Shortfall Amount to
Southcross Holdings. Any amounts funded by any Sponsor pursuant to the foregoing sentence shall reduce, on dollar for dollar basis, (a) the Investment Amount Southcross Holdings is required to fund on the applicable Investment Date and
(b) the Committed Amount, but in each case only to the extent such amount is actually received by SXE. Southcross Holdings or SXE, as applicable, shall deliver a copy of each Backstop Demand sent by such Person to the Administrative Agent
concurrently with delivery thereof to the Sponsors. For the avoidance of doubt, it is acknowledged and agreed that, to the extent that Southcross Holdings has any cash on hand on the applicable Investment Date and does not use such cash to make a
Qualifying Investment in SXE (without the consent of each Sponsor), the Sponsors shall have a valid claim for damages against Southcross Holdings of not less than the lessor of (a) the amount of such cash on hand and (b) the applicable
Investment Amount. 
 2.3    Cure by Sponsor. Notwithstanding anything in this Agreement to the contrary,
any breach or failure by Southcross Holdings to fund any Investment Amount under this Agreement may be cured by one or more Sponsors (acting separately or together), in their respective sole discretion, if such Sponsor or Sponsors funds or fund, as
applicable, the entire Investment Amount as though it were a Sponsor Shortfall Amount pursuant to the provisions of Section 2.2 within thirteen (13) Business Days of delivery of the applicable Investment Notice. 

ARTICLE III 

MISCELLANEOUS 

3.1    Consent to Pledge; Loan Document. Notwithstanding anything to the contrary contained herein
(including without limitation, Section 3.4), Southcross Holdings hereby consents to the pledge by SXE of all of its rights under this Agreement as Collateral in favor of (i) the Administrative Agent, for the ratable benefit of the Secured
Parties pursuant to the Guaranty and Collateral Agreement and (ii) the Term Administrative Agent, for the ratable benefit of the Secured Parties (as defined in the Term Loan Agreement) pursuant to the Guaranty and Collateral Agreement (as
defined in the Term Loan Agreement). SXE and Holdings acknowledge that this Agreement is a Loan Document. 

3.2    Governing Law; Jury Trial Waiver. Etc.. This Agreement shall be governed in all respects, including
as to validity, interpretation and effect, by the laws of the State of New York, New York County, without giving effect to its principles or rules of conflict of laws, to the extent such principles are not mandatorily applicable by statute and would
permit or require the application of the laws of another jurisdiction. The parties hereto hereby irrevocably submit to the jurisdiction of the United States District Court for the Southern District of New York sitting in the Borough of Manhattan, in
the City of New York (and in the absence of federal jurisdiction, the parties hereto consent to be subject to the exclusive jurisdiction of the Supreme Court of the State of New York, New York County) solely in respect of the interpretation and
enforcement of the provisions of this Agreement, and irrevocably agree that all claims in respect of the interpretation and enforcement of the provisions of this Agreement, or with respect to any action or proceeding hereunder, shall be heard and
determined in the United States District Court for the Southern District of New York sitting in the Borough of Manhattan, in the City of New York (and in the absence of federal jurisdiction, the parties hereto consent to be subject to the exclusive

  
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jurisdiction of the Supreme Court of the State of New York, New York County), and that such jurisdiction of such courts with respect thereto shall be exclusive, except solely to the extent that
all such courts shall lawfully decline to exercise such jurisdiction. Each party hereto hereby waives and agrees not to assert, as a defense in any action, suit or proceeding for the interpretation or enforcement hereof, that it is not subject to
such jurisdiction. Each party hereto hereby waives and agrees not to assert, to the maximum extent permitted by law, as a defense in any action, suit or proceeding for the interpretation or enforcement hereof, that such action, suit or proceeding
may not be brought or is not maintainable in such courts, that the venue thereof may not be appropriate or that this Agreement may not be enforced in or by such courts. The parties hereto hereby consent to and grant any such court jurisdiction over
the person of such parties and over the subject matter of any such dispute. THE PARTIES HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE TRIAL BY JURY IN ANY ACTION, SUIT, PROCEEDING OR COUNTERCLAIM BROUGHT BY EITHER OF THEM AGAINST THE OTHER IN ANY
MATTERS ARISING OUT OF OR IN ANY WAY CONNECTED WITH THIS AGREEMENT. 
 3.3    Third-Party Beneficiaries.
The terms and provisions of this Agreement are intended solely for the benefit of the Parties and their respective successors or permitted assigns, and it is not the intention of the Parties to confer third party beneficiary rights upon any other
Person; provided, however, each of Southcross Holdings and SXE acknowledges and agrees that the Administrative Agent and each Sponsor shall have right to enforce this Agreement on behalf of SXE, including by means of specific performance as provided
in Section 3.12, at the sole cost and expense of SXE and reimbursable to the Administrative Agent or such Sponsor pursuant to Section 3.12. 

3.4    Assignment; Waiver. Except as provided in Section 3.1, no Party may assign
its rights and obligations under this Agreement without the prior written consent of the other Parties. This Agreement shall be binding upon and inure to the benefit of the Parties and their respective successors and permitted assigns. Any waiver of
a breach of any of the terms of this Agreement or of any default hereunder shall be in writing and shall not be deemed a waiver of any subsequent breach or default and shall in no way affect the other terms of this Agreement. No failure to exercise
and no relaxation, forbearance, indulgence or delay on the part of any Party in exercising any right, remedy, power or privilege of that Party under this Agreement and no course of dealing among the Parties shall be construed or operate as a waiver
thereof, nor shall any single or partial exercise of any right, remedy, power or privilege preclude any other or further exercise thereof or the exercise of any other right, remedy, power or privilege. 

3.5    Entire Agreement; Severability. This Agreement supersedes all prior discussions and agreements
between the Parties and/or their respective affiliates with respect to the subject matter hereof and contains the sole and entire agreement between the Parties and their respective affiliates hereto with respect to the subject matter hereof. If any
provision of this Agreement or the application of any such provision to any Person or circumstance, shall be declared judicially to be invalid, unenforceable or void, such decision shall not have the effect of invalidating or voiding the remainder
of this Agreement, it being the intent and agreement of the Parties that this Agreement shall be deemed amended to modify such provision to the extent necessary to render it valid, legal and enforceable while preserving its intent or, if such
modification is not possible, by substituting therefor another provision that is valid, legal and enforceable and that achieves the same objective. 

  
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 3.6    Termination of Existing Contribution Agreement. Upon the
occurrence of Effective Date and the consummation of the Initial Investment, the Existing Contribution Agreement is hereby terminated and of no further force or effect. 

3.7    Amendment. This Agreement may only be amended, modified or supplemented by an instrument in writing
signed by the Parties; provided, however, that no amendment, modification or supplement which modifies or affects the rights or obligations of any Sponsor shall be effective without the consent of each such Sponsor. 

3.8    Notices. All notices, demands or communications required or permitted under this Agreement shall be
in writing and delivered personally, by reputable overnight delivery service or other courier with charges prepaid, by certified mail, postage prepaid and return receipt requested, or by facsimile transmission or
e-mail that is confirmed by another writing, sent to the Parties as follows: 
 If to Southcross
Holdings: 
 Southcross Holdings LP., et al. 

1717 Main Street, Suite 5200 

Dallas, Texas 75201 
 Attention:
General Counsel 
 E-mail address: Kelly.Jameson@southcrossenergy.com 

with copies (which shall not constitute notice) to: 

Debevoise & Plimpton LLP 

919 Third Avenue 
 New York, NY,
10022 
 Attention: M. Natasha Labovitz 

Fax: (212) 909-6836 

Email: nlabovitz@debevoise.com 

and 
 EIG Global Energy Partners

 333 Clay Street, Suite 3500 

Houston, TX, 77002 
 Attention:
Matthew Hartman 
 Fax: (713) 615-7468 

Email: matthew.hartman@eigpartners.com 

  
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 and 

Tailwater Capital LLC 
 2021
McKinney Ave., Ste. 1250 
 Dallas, TX 75201 

Attention: Jason Downie 
 Fax:
(214) 292-8562 
 Email: jdownie@tailwatercapital.com 

If to SXE: 
 Southcross Energy
Partners, L.P. 
 1717 Main Street, Suite 5200 

Dallas, TX 75201 
 Attn: Bret M.
Allan 
 Fax: (214) 979-3710 

Email:    bret.allan@southcrossenergy.com 

with a copy to (which shall not constitute notice): 

Latham & Watkins LLP 

811 Main Street 
 Suite 3700 

Houston, TX 77002 
 Attn:
Catherine Ozdogan 
 Fax: (713) 546-7401 

Email: catherine.ozdogan@lw.com 

with a copy to (which alone shall not constitute notice): 

Wells Fargo Bank, N.A. 
 1000
Louisiana Street 
 9th Floor 

Houston, TX 77002 
 Attn: Kristen
Brockman 
 Fax: (713) 739-1087 

Email: Kristen.Brockman@wellsfargo.com 

If to the Administrative Agent: 

Wells Fargo Bank, N.A. 
 1000
Louisiana Street 
 9th Floor 

Houston, TX 77002 
 Attn: Kristen
Brockman 
 Fax: (713) 739-1087 

Email: Kristen.Brockman@wellsfargo.com 

  
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 with a copy to (which shall not constitute notice): 

Vinson & Elkins L.L.P. 

2001 Ross Ave., Suite 3700 

Dallas, TX 75201-2975 
 Attn:
Chris Dawe 
 Fax: (214) 999-7837 

Email: cdawe@velaw.com 
 All such notices shall
be deemed to have been duly given, (a) as of the date of delivery, if delivered personally or by overnight delivery service or other courier, (b) on the date receipt is acknowledged, if delivered by certified mail, and (c) upon the
date on which the transmission is separately confirmed in writing, if delivered by facsimile or e-mail. A Party may change its address for notice by notice to the other Parties in the manner set forth above.

 3.9    Counterparts; Delivery. This Agreement may be executed in any number of counterparts, each of
which shall be deemed an original instrument, but all of which taken together shall constitute one and the same instrument. A Party’s delivery of an executed counterpart signature page by facsimile or
e-mail transmission is as effective as executing and delivering this Agreement in the presence of the other Parties. No Party shall be bound until such time as all of the Parties have executed this Agreement
(or counterparts hereof). 
 3.10    Time of the Essence. With regard to all dates and time periods set
forth or referred to in this Agreement, time is of the essence. 
 3.11    Construction. In this
Agreement, unless a clear contrary intention appears in the applicable provision: (a) the singular includes the plural and vice versa; (b) reference to a person or entity includes such person’s or entity’s successors and assigns
but, in the case of a Party, only if such successors and assigns are permitted by this Agreement; (c) reference to any gender includes each other gender; (d) references to any Section, Article, subsection and other subdivision refer to the
corresponding Section, Article, subsection and other subdivision of this Agreement; (e) references in any Section or Article or definition to any clause means such clause of such Section, Article or definition; (f) “hereunder,”
“hereof,” “hereto” and words of similar import are references to this Agreement as a whole and not to any particular provision of this Agreement; (g) the word “including” (in its various forms) means
“including without limitation”; (h) each accounting term not otherwise defined in this Agreement has the meaning commonly applied to it in accordance with GAAP; (i) references to “days” are to calendar days; and (j) all
references to money refer to the lawful currency of the United States. The Article and Section titles and headings in this Agreement are inserted for convenience of reference only and are not intended to be a part of, or to affect the meaning or
interpretation of, this Agreement. 
 3.12    Specific Performance. The Parties agree that irreparable
damage for which monetary damages, even if available, would not be an adequate remedy, would occur in the event that the Parties do not perform their obligations under the provisions of this Agreement in accordance with its specified terms or
otherwise breach such provisions. The Parties acknowledge and agree that the Parties will be entitled to an injunction or injunctions, specific performance or other equitable relief to prevent breaches of this Agreement and to enforce

  
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specifically the terms and provisions hereof in any court of competent jurisdiction without proof of damages or otherwise, this being in addition to any other remedy to which they are entitled
under this Agreement. For the avoidance of doubt, Southcross Holdings acknowledges and agrees that the Administrative Agent and each Sponsor shall be entitled to specifically enforce this Agreement on behalf of SXE. Any past due amount owing under
this Agreement shall accrue interest at a rate per annum equal to two percent (2%) and shall be payable upon demand. 

3.13    Non-Recourse. Except as provided in the Backstop Investment
Commitment Letter, all proceedings, actions, obligations, damages or causes of action (whether in contract, in tort, in law or in equity, or granted by statute whether by or through attempted piercing of the corporate, limited partnership or limited
liability company veil or otherwise) that may be based upon, in respect of, arise under, out or by reason of, be connected with, or relate in any manner to (a) this Agreement, (b) the negotiation, execution or performance of this Agreement
(including any representation or warranty made in connection with, or as inducement to, this Agreement), (c) any breach or violation of this Agreement and (d) any failure of the transactions contemplated by this Agreement to be
consummated, in each case, may only be made against (and are those solely of) the persons that are expressly named as Parties to this Agreement and then only to the extent of the specific obligations of such Parties. 

3.14    Default. A default or breach by Southcross Holdings under this Agreement that does not involve the
payment of money shall not constitute a default or breach by Southcross Holdings for purposes of the Credit Agreement provided that the full Committed Amount is funded into SXE within the timelines set forth in this Agreement. 

[Signature Page Follows] 

  
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 IN WITNESS WHEREOF, the Parties have duly executed and delivered this Agreement as of the
Effective Date. 
  

			
	SOUTHCROSS HOLDINGS LP
		
	By:	 	SOUTHCROSS HOLDINGS GP LLC,
		 	its General Partner
		
	By:	 	 /s/ Kelly J. Jameson

	Name:	 	Kelly J. Jameson
	Title:	 	Senior Vice President and General Counsel
	
	SOUTHCROSS ENERGY PARTNERS, L.P.
		
	By:	 	SOUTHCROSS ENERGY PARTNERS GP, LLC,
		 	its General Partner
		
	By:	 	 /s/ Bret M. Allan

	Name:	 	Bret M. Allan
	Title:	 	Senior Vice President and Chief Financial Officer

			
	Acknowledged and Agreed
	
	 WELLS FARGO BANK, N.A.,
 as
Administrative Agent

		
	By:	 	 Kristen Brockman

	Name:	 	Kristen Brockman
	Title:	 	DirectorEX-10.3

 Exhibit 10.3 

CONFIDENTIAL 
  

	TO:	Southcross Holdings LP, 

 Southcross Energy Partners, L.P. and 

Wells Fargo Bank, N.A. 
  

	 	Re:	Backstop Investment Commitment 

 Ladies and Gentlemen: 

This Backstop Investment Commitment Letter (this “Letter Agreement”) is made as of December 29, 2016 by and among: 

 

	 	i.	Southcross Energy Partners, L.P. (“SXE”), 

  

	 	ii.	Southcross Holdings LP (“Holdings”), 

  

	 	iii.	Wells Fargo Bank, N.A., as administrative agent (the “Administrative Agent”) under the Third Amended and Restated Revolving Credit Agreement, dated as of August 4, 2014, among SXE, as borrower, the
Administrative Agent, and the lenders party thereto (as amended on or prior to the Effective Date, the “SXE Revolving Credit Agreement”), 

  

	 	iv.	TW Southcross Aggregator LP (“TW Aggregator”), 

  

	 	v.	TW BBTS Aggregator LP (“TW Main”), 

  

	 	vi.	TW Southcross Sidecar II LP (“TW Sidecar”), 

  

	 	vii.	TW Southcross Sidecar II(N-QP) LP (“TW Sidecar N-QP” and, together with TW Main and TW Sidecar, the TW
Funds”), 

  

	 	viii.	EIG BBTS Holdings, LLC (“EIG Aggregator”), 

  

	 	ix.	EIG Energy XV (BBTS) Blocker, LLC (“EIG XV Blocker”), 

  

	 	x.	EIG Energy Fund XV Holdings, LP (“EIG XV Holdings”), 

  

	 	xi.	EIG Energy Fund XV Cayman Blocker, LP (“EIG XV Cayman Blocker”), 

  

	 	xii.	EIG Energy Fund XV (Cayman), L.P. (“EIG XV Cayman”), 

  

	 	xiii.	EIG Energy Fund XV-B, L.P. (“EIG XV-B”), 

 

	 	xiv.	EIG Energy Fund XV-A, L.P. (“EIG XV-A”), 

 

	 	xv.	EIG Energy Fund XV, L.P. (“EIG XV” and, together with EIG XV Blocker, EIG XV Holdings, EIG XV Cayman Blocker, EIG XV Cayman, EIG XV-B, and EIG XV-A, the “EIG XV Funds”), 

  

	 	xvi.	EIG Energy XIV Blocker (BBTS), LLC (“EIG XIV Blocker”), 

  

	 	xvii.	EIG Energy Fund XIV (Cayman), L.P. (“EIG XIV Cayman”), 

  

	 	xviii.	EIG Energy Fund XIV-B, L.P. (“EIG XIV-B”), 

	 	xix.	EIG Energy Fund XIV-A, L.P. (“EIG XIV-A”), and 

 

	 	xx.	EIG Energy Fund XIV, L.P. (“EIG XIV” and, together with EIG XIV Blocker, EIG XIV Cayman, EIG XIV-B, and EIG XIV-A, the
“EIG XIV Funds”) 

 Reference is made to the Investment Agreement attached hereto as Annex I (as the same may
be amended, restated, supplemented or otherwise modified from time to time in accordance with its terms, the “Investment Agreement”), dated as of the date hereof, by and among Holdings, SXE, and the Administrative Agent. Capitalized
terms used herein without definition shall have the meanings given to them in the Investment Agreement. 
 1.    Subject
to receipt of a valid Backstop Demand meeting the requirements of Section 2.2 of the Investment Agreement by the EIG XIV Funds and the EIG XV Funds (collectively, the “EIG Funds”), the EIG Funds shall,
within thirteen (13) Business Days of delivery of the applicable Investment Notice, be severally obligated, in accordance with the percentages set forth below, to fund an amount equal to 50.00% of the applicable Sponsor Shortfall Amount (or
such larger amount as is unanimously agreed in writing by each of the TW Aggregator, the TW Funds, the EIG Aggregator and the EIG Funds (each, a “Sponsor”, and together, the “Sponsors”)) (the “EIG
Amount”) as follows: 
  

	 	i.	EIG XV-B shall contribute 11.46675% of the EIG Amount to EIG XV Holdings, which shall in turn contribute such amount to EIG XV Blocker, which shall in turn contribute such amount
to the EIG Aggregator; 

  

	 	ii.	EIG XV Cayman shall contribute 9.29633% of the EIG Amount to EIG XV Cayman Blocker, which shall in turn contribute such amount to EIG XV Holdings, which shall in turn contribute such amount to EIG XV Blocker, which
shall in turn contribute such amount to the EIG Aggregator, 

  

	 	iii.	EIG XV-A shall contribute 11.86021% of the EIG Amount to the EIG Aggregator, 

  

	 	iv.	EIG XV shall contribute 17.37671% of the EIG Amount to the EIG Aggregator, 

  

	 	v.	EIG XIV Cayman shall contribute 11.25871% of the EIG Amount to EIG XIV Blocker, which shall in turn contribute such amount to the EIG Aggregator, 

 

	 	vi.	EIG XIV-B shall contribute 3.11974% of the EIG Amount to EIG XIV Blocker, which shall in turn contribute such amount to the EIG Aggregator, 

 

	 	vii.	EIG XIV-A shall contribute 18.81202% of the EIG Amount to the EIG Aggregator, and 

	 	viii.	EIG XIV shall contribute 16.80953% of the EIG Amount to the EIG Aggregator. 

2.    Upon receipt of the EIG Amount pursuant to the contributions described in Section 1 of
this Letter Agreement, the EIG Aggregator shall promptly (but in any event within thirteen (13) Business Days of delivery of the applicable Investment Notice) use the entirety of such EIG Amount to fund, in such proportions as the EIG
Aggregator shall elect, (i) a Qualifying Investment pursuant Section 2.2 of the Investment Agreement or (ii) to the extent permitted by the limited partnership agreement of Holdings and the Investment Agreement, a
contribution to Holdings in exchange for new equity in Holdings issued pursuant the terms of the limited partnership agreement of Holdings and otherwise on terms reasonably agreed between Holdings and the EIG Aggregator. 

3.    Subject to receipt of a valid Backstop Demand meeting the requirements of Section 2.2 of
the Investment Agreement by the TW Funds, the TW Funds shall, within thirteen (13) Business Days of delivery of the applicable Investment Notice, be severally obligated, in accordance with the percentages set forth below, to fund an amount
equal to 50.00% of the applicable Sponsor Shortfall Amount (or such larger amount as is unanimously agreed in writing by each Sponsor) (the “TW Amount”) as follows (or in such other proportions directed by TW Aggregator at the time
of the receipt of such Backstop Demand; provided that the TW Funds must be capable of, and have sufficient liquidity to, fund alternative proportions for such alternative direction to govern): 

 

	 	i.	TW Sidecar shall contribute 98.95% of the TW Amount to the TW Aggregator, and 

  

	 	ii.	TW Sidecar N-QP shall contribute 1.05% of the TW Amount to the TW Aggregator. 

4.    Upon receipt of the TW Amount pursuant to the contributions described in Section 3 of this
Letter Agreement, the TW Aggregator shall promptly (but in any event within thirteen (13) Business Days of delivery of the applicable Investment Notice) use the entirety of such TW Amount to fund, in such proportions as the TW Aggregator shall
elect, (i) a Qualifying Investment pursuant Section 2.2 of the Investment Agreement or (ii) to the extent permitted by the limited partnership agreement of Holdings and the Investment Agreement, a contribution to
Holdings in exchange for new equity in Holdings issued pursuant the terms of the limited partnership agreement of Holdings and otherwise on terms reasonably agreed between Holdings and the TW Aggregator. 

5.    For the avoidance of doubt, and notwithstanding anything in this Letter Agreement to the contrary, (i) the
aggregate funding obligations of the EIG Funds and the EIG Aggregator under this Letter Agreement shall not exceed $7,500,000 (the “EIG Commitment”) and (ii) the aggregate funding obligations of the TW Funds and the TW
Aggregator under this Letter Agreement shall not exceed $7,500,000 (the “TW Commitment”). 

 6.    The Sponsors’ respective several obligations to fund their
respective portions of the EIG Commitment or the TW Commitment, as applicable, may not be assigned; provided, that any Sponsor may fund all or a portion of its respective portion of the EIG Commitment or the TW Commitment, as applicable,
through affiliates or affiliated funds or to entities governed by an affiliate or an affiliated fund; provided, further, that any such funding arrangements shall not relieve such Sponsor of its obligations under this Letter Agreement.

 7.    During the term of this Letter Agreement, no EIG Funding Entity with a share of the EIG Commitment will, as of
the last day of any fiscal quarter, permit the ratio (the “EIG Liquidity Ratio”) of (x) the liquidity of such EIG Funding Entity (which may include, without duplication, cash on hand, unfunded capital commitments and
availability under any credit facilities) to (y) the unfunded amount of such EIG Funding Entity’s pro rata share of the EIG Commitment as of the end of such fiscal quarter, to be less than 1.10 to 1.00. 

8.    Promptly after the last day of each fiscal quarter, but in any event not later than (x) for fiscal quarters
ending March 31, June 30, or September 30, 60 days after the end of each such fiscal quarter and (y) for fiscal quarters ending December 31 (commencing with the fiscal quarter ending December 31, 2016), 90 days after
the end of each such fiscal quarter, the EIG Aggregator shall deliver to each of SXE and the Administrative Agent (i) a certificate of a financial officer in the form attached hereto as Annex II certifying, to the knowledge of such
financial officer, as to whether a default by any EIG Fund or the EIG Aggregator has occurred and is continuing hereunder and, if a default has occurred and is continuing, specifying the details thereof and any action taken or proposed to be taken
with respect thereto and (ii) copies of the most recently available regular financial reports (prepared in conformity with GAAP) of the EIG Funding Entities. 

9.    During the term of this Letter Agreement, no TW Funding Entity with a share of the TW Commitment will, as of the
last day of any fiscal quarter, permit the ratio (the “TW Liquidity Ratio”) of (x) the liquidity of such TW Funding Entity (which may include, without duplication, cash on hand, unfunded capital commitments and availability
under any credit facilities) to (y) the unfunded amount of such TW Funding Entity’s pro rata share of the TW Commitment as of the end of such fiscal quarter, to be less than 1.10 to 1.00. 

10.    Promptly after the last day of each fiscal quarter, but in any event not later than (x) for fiscal quarters
ending March 31, June 30, or September 30, 60 days after the end of each such fiscal quarter and (y) for fiscal quarters ending December 31 (commencing with the fiscal quarter ending December 31, 2016), 90 days after
the end of each such fiscal quarter, the TW Aggregator shall deliver to each of SXE and the Administrative Agent (i) a certificate of a financial officer in the form attached hereto at Annex II certifying, to the knowledge of such
financial officer, as to whether a default by any TW Fund or the TW Aggregator has occurred and is continuing hereunder and, if a default has occurred and is continuing, specifying the details thereof and any action taken or proposed to be taken
with respect thereto and (ii) copies of the most recently available regular financial reports (prepared in conformity with GAAP) of the TW Funding Entities. 

 11.    Each Sponsor understands and agrees, to the fullest extent permitted
under applicable law and except as otherwise be expressly provided herein, that each Sponsor shall remain obligated hereunder and the enforceability and effectiveness of this Letter Agreement and the rights, remedies, powers and privileges of
Holdings, SXE and the Administrative Agent under this Letter Agreement shall not be affected, limited, reduced, discharged or terminated in any way as a result of, and each Sponsor hereby expressly waives to the fullest extent permitted by law any
defense now or in the future arising by reason of, (A) the illegality, invalidity or unenforceability of the SXE Revolving Credit Agreement, the Investment Agreement, any other Loan Document; (B) the insolvency, bankruptcy arrangement,
reorganization, adjustment, composition, liquidation, disability, dissolution or lack of power of any Sponsor, Holdings or any other Person at any time liable for the payment of all or part of the Holdings’ obligations under the Investment
Agreement or the failure of Holdings, SXE or the Administrative Agent to file or enforce a claim in bankruptcy or other proceeding with respect to any person. Notwithstanding the foregoing, the Sponsors obligations shall be subject to the express
terms and conditions of this Letter Agreement (including, with respect to the applicable Sponsors’ obligations under Sections 1, 2, 3, and 4, the receipt of a valid Backstop Demand meeting the requirements of
Section 2.2 of the Investment Agreement). 
 12.    In the event any payment by Holdings or
any Sponsor in respect of the obligations of Holdings under the Investment Agreement is held to constitute a preference, fraudulent transfer or other voidable payment under any bankruptcy, insolvency or similar law, or if for any other reason, SXE
is required to refund such payment or pay the amount thereof to any other party, such payment by Holdings or any Sponsor to SXE shall not constitute a release of any from any liability hereunder, and this Letter Agreement shall continue to be
effective or shall be reinstated (notwithstanding any prior release, surrender or discharge by SXE of this Letter Agreement or of any Sponsor), as the case may be, with respect to, and this Letter Agreement shall apply to, any and all amounts so
refunded by SXE or paid by SXE to another Person. 
 13.    Notwithstanding anything to the contrary contained herein
(including without limitation, Section 16), each Sponsor hereby consents to the pledge by SXE of all of its rights under this Letter Agreement as Collateral in favor of (i) the Administrative Agent, for the ratable
benefit of the Secured Parties pursuant to the Guaranty and Collateral Agreement and (ii) the Term Administrative Agent, for the ratable benefit of the Secured Parties (as defined in the Term Loan Agreement) pursuant to the Guaranty and
Collateral Agreement (as defined in the Term Loan Agreement). SXE, Holdings and each Sponsor acknowledge that this Letter Agreement is a Loan Document. Capitalized terms used in this paragraph without definition herein or in the Investment Agreement
shall have the meanings given to them in the Credit Agreement. 
 14.    This Letter Agreement shall become effective
only upon execution and delivery of (i) this Letter Agreement and (ii) the Investment Agreement. 

 15.    This Letter Agreement, and all obligations hereunder (including each
Sponsor’s several obligations to fund to its respective portion of the EIG Commitment or the TW Commitment, as applicable) shall terminate upon the earliest to occur of (i) termination of the Investment Agreement and
(ii) the date on which there is no remaining Committed Amount under the Investment Agreement (subject to reinstatement solely as provided in Section 12 above). 

16.    Except as set forth in Section 13, this Letter Agreement shall be binding on and solely
to the benefit of and enforceable by the parties hereto and nothing set forth in this Letter Agreement shall be construed to confer upon or give to any other Person any benefits, rights or remedies under this Letter Agreement. The funding
obligations of each Sponsor contained herein shall be directly enforceable by Holdings, SXE and the Administrative Agent, including by means of specific performance as provided in Section 17, at the sole cost and expense of
SXE and reimbursable to the Administrative Agent pursuant to Section 12.03 of the Credit Agreement. 
 17.    Each
Sponsor acknowledges and agrees that damages may be difficult to ascertain and may not be an adequate remedy for its breach of this Letter Agreement, and therefore SXE (and the Administrative Agent on behalf of SXE) shall be entitled to specifically
enforce this Agreement. Any past due amount owing under this Letter Agreement shall accrue interest at a rate per annum equal to two percent (2%) and shall be payable upon demand. 

18.    Notwithstanding anything that may be expressed or implied in this Letter Agreement, the parties hereto, by their
acceptance of the benefits of this equity commitment, each covenant, agree and acknowledge that no Person other than the parties hereto shall have any obligation hereunder and that, notwithstanding that the undersigned may be a limited partnership,
no recourse hereunder or under any documents or instruments delivered in connection herewith shall be had against any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder, other
direct or indirect beneficial owner, affiliate or assignee of the undersigned or any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder, other direct or indirect beneficial owner,
affiliate or assignee of any of the foregoing, whether by the enforcement of any assessment or by any legal or equitable proceeding, or by virtue of any statute, regulation or other applicable law or otherwise, it being expressly agreed and
acknowledged that no personal liability whatsoever shall attach to, be imposed on or otherwise be incurred by any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder, other direct or
indirect beneficial owner, affiliate or assignee of the undersigned or any former, current or future director, officer, employee, agent, general or limited partner, manager, member, stockholder, other direct or indirect beneficial owner, affiliate
or assignee of any of the foregoing, as such, for any obligations of the undersigned under this Letter Agreement or any documents or instruments delivered in connection herewith or for any claim based on, in respect of, or by reason of such
obligation or their creation. 

 19.    Each of the Sponsors hereby severally represents and warrants to
Holdings, SXE and the Administrative Agent that (i) such Sponsor has all necessary power and authority to execute, deliver and perform this Letter Agreement, (ii) the execution, delivery and performance of this Letter Agreement by such
Sponsor has been duly and validly authorized and approved by all necessary limited partnership or corporate action by such Sponsor, (iii) this Letter Agreement has been duly and validly executed and delivered by such Sponsor and
constitutes a valid and legally binding obligation of such Sponsor, and (iv) the execution, delivery and performance of this Letter Agreement by such Sponsor does not and will not conflict with, violate the terms of or result in the
acceleration of any obligation under (a) any material contract, material commitment or other material instrument to which such Sponsor is a party or is bound, or (b) the limited liability company agreement, limited partnership agreement,
or other applicable governing documents of such Sponsor. 
 20.    All notices, demands (including Backstop Demands) or
communications to the Sponsors required or permitted under this Letter Agreement shall be in writing and delivered personally, by reputable overnight delivery service or other courier with charges prepaid, by certified mail, postage prepaid and
return receipt requested, or by facsimile transmission or e-mail that is confirmed by the recipient writing, sent as follows: 

If to the EIG Aggregator or any EIG Fund: 

EIG Global Energy Partners 
 333
Clay Street, Suite 3500 
 Houston, TX, 77002 

Attention: Matthew Hartman 
 Fax:
(713) 615-7468 
 Email: matthew.hartman@eigpartners.com 

with copies (which alone shall not constitute notice) to: 

Debevoise & Plimpton LLP 

919 Third Avenue 
 New York, NY,
10022 
 Attention: M. Natasha Labovitz 

Fax: (212) 909-6836 

Email: nlabovitz@debevoise.com 

 If to the TW Aggregator or any TW Fund: 

Tailwater Capital LLC 
 2021
McKinney Ave., Ste. 1250 
 Dallas, TX 75201 

Attention: Jason Downie 
 Fax: 214-292-8562 
 Email: jdownie@tailwatercapital.com 

If to the Administrative Agent: 

Wells Fargo Bank, N.A. 
 1000
Louisiana Street 
 9th Floor 

Houston, TX 77002 
 Attn: Kristen
Brockman 
 Fax: (713) 739-1087 

Email: Kristen.Brockman@wellsfargo.com 

with a copy to (which shall not constitute notice): 

Vinson & Elkins L.L.P. 

2001 Ross Ave., Suite 3700 

Dallas, TX 75201-2975 
 Attn:
Chris Dawe 
 Fax: 214-999-7837 

Email: cdawe@velaw.com 

21.    This Letter Agreement shall be governed in all respects, including as to validity, interpretation and effect, by
the laws of the State of New York, New York County, without giving effect to its principles or rules of conflict of laws, to the extent such principles are not mandatorily applicable by statute and would permit or require the application of the laws
of another jurisdiction. The parties hereto hereby irrevocably submit to the jurisdiction of the United States District Court for the Southern District of New York sitting in the Borough of Manhattan, in the City of New York (and in the absence of
federal jurisdiction, the parties hereto consent to be subject to the exclusive jurisdiction of the Supreme Court of the State of New York, New York County) solely in respect of the interpretation and enforcement of the provisions of this Letter
Agreement, and irrevocably agree that all claims in respect of the interpretation and enforcement of the provisions of this Letter Agreement, or with respect to any action or proceeding hereunder, shall be heard and determined in the United States
District Court for the Southern District of New York sitting in the Borough of Manhattan, in the City of New York (and in the absence of federal jurisdiction, the parties hereto consent to be subject to the exclusive jurisdiction of the Supreme
Court of the State of New York, New York County), and that such jurisdiction of such courts with respect thereto shall be exclusive, except solely to the extent that all such courts shall lawfully decline to exercise such

 
jurisdiction. Each party hereto hereby waives and agrees not to assert, as a defense in any action, suit or proceeding for the interpretation or enforcement hereof, that it is not subject to such
jurisdiction. Each party hereto hereby waives and agrees not to assert, to the maximum extent permitted by law, as a defense in any action, suit or proceeding for the interpretation or enforcement hereof, that such action, suit or proceeding may not
be brought or is not maintainable in such courts, that the venue thereof may not be appropriate or that this Letter Agreement may not be enforced in or by such courts. The parties hereto hereby consent to and grant any such court jurisdiction over
the person of such parties and over the subject matter of any such dispute. THE PARTIES HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVE TRIAL BY JURY IN ANY ACTION, SUIT, PROCEEDING OR COUNTERCLAIM BROUGHT BY EITHER OF THEM AGAINST THE OTHER IN ANY
MATTERS ARISING OUT OF OR IN ANY WAY CONNECTED WITH THIS LETTER AGREEMENT. 
 22.    Together with the Investment
Agreement, this Letter Agreement constitutes the sole agreement, and supersedes all prior agreements, understandings and statements, written or oral, between the undersigned or any of its affiliates and any other person with respect to the subject
matter hereof. The terms of this Letter Agreement may not be modified or otherwise amended, or waived, except pursuant to a written agreement signed by the parties hereto. This Letter Agreement may be executed in any number of counterparts, each of
which shall be an original, but all of which together shall constitute one and the same instrument. 
 23.    A default
or breach by any Sponsor under this Agreement that does not involve the payment of money shall not constitute a default or breach by such Sponsor for purposes of the Credit Agreement provided that the full Committed Amount is funded into SXE within
the timelines set forth in the Investment Agreement. 
 [Rest of Page Left Intentionally Blank] 

 
			
	Very truly yours,
	
	EIG Energy Fund XIV, L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy Fund XIV-A, L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy Fund XIV-B, L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President

  
 [Signature Page to
Backstop Investment Commitment Letter] 

 
			
	EIG Energy Fund XIV (Cayman), L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy XIV Blocker (BBTS), LLC
	By: EIG Management Company, LLC, it manager
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy Fund XV, L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President

  
 [Signature Page to
Backstop Investment Commitment Letter] 

 
			
	EIG Energy Fund XV-A, L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy Fund XV-B, L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy Fund XV (Cayman), L.P.
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President

  
 [Signature Page to
Backstop Investment Commitment Letter] 

 
			
	EIG Energy Fund XV Cayman Blocker, L.P.
	By: EIG Energy Fund XV Cayman Blocker GP, LLC, its general partner
	By: EIG Energy Fund XV (Cayman), L.P., its sole member
	By: EIG Management Company, LLC, its sub-advisor
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy Fund XV Holdings, LP
	By: EIG Funds Management, LLC, its general partner
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President
	
	EIG Energy XV (BBTS) Blocker, LLC
	By: EIG Management Company, LLC, its manager
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President

  
 [Signature Page to
Backstop Investment Commitment Letter] 

			
	EIG BBTS Holdings, LLC
	By: EIG Management Company, LLC, its manager
		
	By:	 	 /s/ Wallace Henderson

	Name:	 	Wallace Henderson
	Title:	 	Managing Director
		
	By:	 	 /s/ Matthew Hartman

	Name:	 	Matthew Hartman
	Title:	 	Senior Vice President

  
 [Signature Page to
Backstop Investment Commitment Letter] 

 
			
	TW Southcross Aggregator LP
	By: TW/LM GP SUB, LLC, its general partner
		
	By:	 	 /s/ Jason Downie

	Name:	 	Jason Downie
	Title:	 	Managing Partner
	
	TW Southcross Sidecar II LP
	By: TW GP EF-I GP, LLC, its general partner
		
	By:	 	 /s/ Jason Downie

	Name:	 	Jason Downie
	Title:	 	Managing Partner
	
	TW Southcross Sidecar II(N-QP) LP
	By: TW GP EF-I GP, LLC, its general partner
		
	By:	 	 /s/ Jason Downie

	Name:	 	Jason Downie
	Title:	 	Managing Partner
	
	TW BBTS Aggregator LP
	By: TW/LM GP SUB, LLC, its general partner
		
	By:	 	 /s/ Jason Downie

	Name:	 	Jason Downie
	Title:	 	Managing Partner

  
 [Signature Page to
Backstop Investment Commitment Letter] 

			
	Acknowledged and agreed as of the date first above written:
	
	SOUTHCROSS HOLDINGS LP
		
	By:	 	SOUTHCROSS HOLDINGS GP LLC,
		 	its General Partner
		
	By:	 	 /s/ Kelly J. Jameson

	Name:	 	Kelly J. Jameson
	Title:	 	Senior Vice President and General Counsel
	
	SOUTHCROSS ENERGY PARTNERS, L.P.
		
	By:	 	SOUTHCROSS ENERGY PARTNERS GP, LLC,
		 	its General Partner
		
	By:	 	 /s/ Bret M. Allan

	Name:	 	Bret M. Allan
	Title:	 	Senior Vice President and Chief Financial Officer

  
 [Signature Page to
Backstop Investment Commitment Letter] 

			
	 WELLS FARGO BANK, N.A.,
 as
Administrative Agent

		
	By:	 	 /s/ Kristen Brockman

	Name:	 	Kristen Brockman
	Title:	 	Director

  
 [Signature Page to
Backstop Investment Commitment Letter] 

 Annex I 

Investment Agreement 
 [See
Attached] 

 Annex II 

Form of Compliance Certificate 

I, [                    ]1, the financial officer of [the manager of] [EIG BBTS Holdings, LLC] / [TW Southcross Aggregator LP] (the “Sponsor”) (solely in such capacity and not in my individual capacity),
hereby certify that, to my knowledge, with respect to that certain Backstop Investment Commitment Letter, dated as of December [●], 2016 (as amended, restated, amended and restated, supplemented or otherwise modified from time to time, the
“Letter Agreement”; capitalized terms used herein without definition shall have the meanings given to them in such Letter Agreement) by and among Southcross Energy Partners, L.P., Southcross Holdings LP, Wells Fargo Bank, N.A., as
administrative agent, the Sponsor and the other parties thereto, no default by any of (i) the Sponsor or (ii) any [TW] / [EIG] Fund has occurred and is continuing thereunder.2 

 

			
	By:	 	  

	Name:	 	
	Title:	 	

  
  

	1 	Insert name of financial officer. 

	2 	If a default has occurred and is continuing, then instead specify the details of such default and any action taken or proposed to be taken with respect thereto.

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