1 | Building Technologies Program eere.energy.gov

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2 | Building Technologies Program eere.energy.gov

 DOE is Stricter

DOE is Stricter 

0

5

10

15

20

25

30

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 1 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

0.0

0.5

1.0

1.5

2.0

2.5

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Pm + Psb (W)

Battery Energy (Wh)

PC 1 - Pm + Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

Results and Proposed Standards

Battery Charger Product Class 1
3 | Building Technologies Program eere.energy.gov

 CEC is Stricter

CEC is Stricter 

0

50

100

150

200

250

300

1 11 21 31 41 51 61 71 81 91 101

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 2 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CSL 4

CEC

0

1

2

3

4

5

6

7

8

1 11 21 31 41 51 61 71 81 91 101

Pm + Psb (W)

Battery Energy (Wh)

PC 2- Pm+Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CSL 4

CEC

Results and Proposed Standards

Battery Charger Product Class 2
4 | Building Technologies Program eere.energy.gov

 CEC is Stricter

CEC is Stricter 

0

50

100

150

200

250

300

350

1 11 21 31 41 51 61 71 81 91 101

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 3 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

0

2

4

6

8

10

12

14

1 11 21 31 41 51 61 71 81 91 101

Pm + Psb (W)

Battery Energy (Wh)

PC 3 - Pm+Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

Results and Proposed Standards

Battery Charger Product Class 3
5 | Building Technologies Program eere.energy.gov

 CEC is Stricter

CEC is Stricter 

0

50

100

150

200

250

300

350

400

1 11 21 31 41 51 61 71 81 91 101

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 4 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

0

2

4

6

8

10

12

14

1 11 21 31 41 51 61 71 81 91 101

Pm + Psb (W)

Battery Energy (Wh)

PC 4 - Pm+Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

Results and Proposed Standards

Battery Charger Product Class 4
6 | Building Technologies Program eere.energy.gov

 CEC is Stricter

CEC is Stricter 

0

1000

2000

3000

4000

5000

6000

7000

8000

100200300400500600700800900

100011001200130014001500160017001800190020002100220023002400250026002700280029003000

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 5 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

0

10

20

30

40

50

60

70

100200300400500600700800900

100011001200130014001500160017001800190020002100220023002400250026002700280029003000

Pm + Psb (W)

Battery Energy (Wh)

PC 5 - Pm+Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

Results and Proposed Standards

Battery Charger Product Class 5
7 | Building Technologies Program eere.energy.gov

 DOE is Stricter

CEC is Stricter 

0

1000

2000

3000

4000

5000

6000

7000

8000

100200300400500600700800900

100011001200130014001500160017001800190020002100220023002400250026002700280029003000

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 6 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

0

10

20

30

40

50

60

70

100200300400500600700800900

100011001200130014001500160017001800190020002100220023002400250026002700280029003000

Pm + Psb (W)

Battery Energy (Wh)

PC 6 - Pm+Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

Results and Proposed Standards

Battery Charger Product Class 6
8 | Building Technologies Program eere.energy.gov

 DOE is Stricter

DOE is Stricter 

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

3000 3500 4000 4500 5000 5500 6000

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 7 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CEC

0

2

4

6

8

10

12

14

16

3000 3500 4000 4500 5000 5500 6000

Pm + Psb (W)

Battery Energy (Wh)

PC 7 - Pm+Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CEC

Results and Proposed Standards

Battery Charger Product Class 7
9 | Building Technologies Program eere.energy.gov

 DOE is Stricter

DOE is Stricter 

0

5

10

15

20

25

30

35

40

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

24-Hour Energy (Wh)

Battery Energy (Wh)

PC 8 - E_24 Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CSL 4

CEC

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Pm + Psb (W)

Battery Energy (Wh)

PC 8 - Pm + Psb Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CSL 4

CEC

Results and Proposed Standards

Battery Charger Product Class 8
10 | Building Technologies Program eere.energy.gov

 PC 10a - DOE is 

stricter up to 130 Wh and 

CEC is stricter thereafter

PC 10b - DOE is 

stricter up to 65 Wh 

and CEC is stricter 

thereafter 

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

1 51 101 151 201 251

Pm (W)

Battery Energy (Wh)

PC 10a - Pm Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

0.0

1.0

2.0

3.0

4.0

5.0

6.0

1 51 101 151 201 251

Pm (W)

Battery Energy (Wh)

PC 10b - Pm Vs Battery Energy

CSL 0

CSL 1

CSL 2

CSL 3

CEC

Results and Proposed Standards

Battery Charger Product Class 10A &10B
11 | Building Technologies Program eere.energy.gov

Proposed Energy Conservation Standard 

Equations – External Power Supplies

AC-DC, Basic-Voltage External Power Supply

Nameplate Output 

Power (Pout)

Minimum Average 

Efficiency in Active 

Mode 

(expressed as a decimal)

Maximum Power in NoLoad Mode [W]

0 to ≤ 1 watt ≥ 0.5 * Pout + 0.16 ≤ 0.100

> 1 to ≤ 49 watts ≥ 0.071 * ln(Pout) - 0.0014 

* Pout +0.67 ≤ 0.100

> 49 watts to ≤ 250 watts ≥ 0.880 ≤ 0.210

> 250 watts 0.875 ≤ 0.500

• DOE is proposing TSL 2 for AC-DC, Basic Voltage EPSs
12 | Building Technologies Program eere.energy.gov

Proposed Energy Conservation Standard 

Equations – External Power Supplies

AC-DC, Low-Voltage External Power Supply

Nameplate Output 

Power (Pout)

Minimum Average 

Efficiency in Active 

Mode 

(expressed as a decimal)

Maximum Power in NoLoad Mode [W]

0 to ≤ 1 watt ≥ 0.517 * Pout + 0.087 ≤ 0.100

> 1 to ≤ 49 watts ≥ 0.0834 * ln(Pout) -

0.0014 * Pout + 0.609 ≤ 0.100

> 49 watts to ≤ 250 watts ≥ 0.870 ≤ 0.210

> 250 watts 0.875 ≤ 0.500

• DOE is proposing TSL 2 for AC-DC, Low-Voltage EPSs
13 | Building Technologies Program eere.energy.gov

Proposed Energy Conservation Standard 

Equations – External Power Supplies

AC-AC, Basic-Voltage External Power Supply

Nameplate Output 

Power (Pout)

Minimum Average 

Efficiency in Active 

Mode 

(expressed as a decimal)

Maximum Power in NoLoad Mode [W]

0 to ≤ 1 watt ≥ 0.5 * Pout + 0.16 ≤ 0.210

> 1 to ≤ 49 watts ≥ 0.071 * ln(Pout) - 0.0014 

* Pout +0.67 ≤ 0.210

> 49 watts to ≤ 250 watts ≥ 0.880 ≤ 0.210

> 250 watts 0.875 ≤ 0.500

• DOE is proposing TSL 2 for AC-AC, Basic Voltage EPSs
14 | Building Technologies Program eere.energy.gov

Proposed Energy Conservation Standard 

Equations – External Power Supplies

AC-AC, Low-voltage External Power Supply

Nameplate Output 

Power (Pout)

Minimum Average 

Efficiency in Active 

Mode 

(expressed as a decimal)

Maximum Power in NoLoad Mode [W]

0 to ≤ 1 watt ≥ 0.517 * Pout + 0.087 ≤ 0.210

> 1 to ≤ 49 watts ≥ 0.0834 * ln(Pout) -

0.0014 * Pout + 0.609 ≤ 0.210

> 49 watts to ≤ 250 watts ≥ 0.870 ≤ 0.210

> 250 watts 0.875 ≤ 0.500

• DOE is proposing TSL 2 for AC-AC, Low-Voltage EPSs
15 | Building Technologies Program eere.energy.gov

Proposed Energy Conservation Standard 

Equations – External Power Supplies

Multiple-Voltage External Power Supply

Nameplate Output 

Power (Pout)

Minimum Average 

Efficiency in Active 

Mode 

(expressed as a 

decimal)

Maximum Power in NoLoad Mode [W]

0 to ≤ 1 watt ≥ 0.497 × Pout + 0.067 ≤ 0.300

> 1 to ≤ 49 watts ≥ 0.075 × ln(Pout) + 

0.561 ≤ 0.300

> 49 watts ≥ 0.860 ≤ 0.300

• DOE is proposing TSL 2 for Multiple-Voltage EPSs
16 | Building Technologies Program eere.energy.gov

Battery Charger Proposed Standards (PC 1-5)

Product 

Class Product Class Description

Proposed Standard as a 

Function of Battery Energy 

(kWh/yr)

1 Low-Energy, Inductive 3.04

2 Low-Energy, Low-Voltage = 0.2095(Ebatt*) + 5.87

3 Low-Energy, Medium-Voltage

For Ebatt < 9.74 Wh,

= 4.68

For Ebatt ≥ 9.74 Wh,

= 0.0933(Ebatt) + 3.77

4 Low-Energy, High-Voltage

For Ebatt < 9.71 Wh,

= 9.03

For Ebatt ≥ 9.71 Wh,

= 0.2411(Ebatt) + 6.69

5 Medium-Energy, Low-Voltage

For Ebatt < 355.18 Wh,

= 20.06

For Ebatt ≥ 355.18 Wh,

= 0.0219(Ebatt) + 12.28

Proposed Energy Conservation Standard 

Equations – Battery Chargers
17 | Building Technologies Program eere.energy.gov

Battery Charger Proposed Standards (PC 6-10)

Product 

Class Product Class Description

Proposed Standard as a 

Function of Battery Energy 

(kWh/yr)

6 Medium-Energy, High-Voltage

For Ebatt < 239.48 Wh = 0.37

For Ebatt ≥ 239.48 Wh

= 0.0495(Ebatt) + 18.51

7 High-Energy = 0.502(Ebatt) + 4.53

8 Low-Voltage DC Input 0.66

9 High-Voltage DC Input No Standard.

10a AC Output (w/out AVR)

For Ebatt < 37.2 Wh = 2.54 

For Ebatt ≥ 37.2 Wh

= 0.0733(Ebatt) – 0.18 

10b AC Output (w AVR)

For Ebatt < 37.2 Wh = 6.18 

For Ebatt ≥ 37.2 Wh

= 0.0733(Ebatt) + 3.45 

Proposed Energy Conservation Standard 

Equations – Battery Chargers