Home Battery Expansion - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: July 11, 2025, 03:01:44 am
content: I've gotten rid of my big water tank (which hadn't been used for years) so now I've got room to move the current 25kWh AERL battery outside to free up space in the garage, and of course to help reduce any possible fire risk.Plus the Australian government has just turned on the free money printer and is subsidising home batteries.Peter from AERL tells me that installing an additional 50kWh battery would be basically the same price as an extra 25kWh, so I might as well max it the benefit, giving me 75kWhI'll wait to see what he comes back with in terms of housing the batteries, I might be able to consolidate the housing, as my current 5x5kWh batteries are in the indoor only rated rack.My 25kWh so far has been adequate on some days, and not enough on other days.Also, with my new 3 hour free charging window, with the 5kW Deye I can only get 15kWh free a day, the rest has to come from the panel excess.And the 5kW Deye has been a bottleneck, no to mention my issues with it, so I'll be replacing that with another brand, preferably 10kW (will need a cable pull upgrade).Peter is recommending this 8kW Solis:https://www.solisinverters.au/product_detail/S6-EH1P(3-8)K-L-PLUS-AUThat will give me 24kWh/day for free from the grid which is nice.Looks decent, apparently it's a 5th gen product compared to Deye being a 1st gen product. Still made in China thoughIt does support the grid side AC coupling, microinverter on gen port, and charge timers that I need.

author: cunningfellow
author_rank: Regular Contributor
timestamp: July 11, 2025, 03:15:17 am
content: What $s are you looking at for 50KWh of battery after the subsidy?

author: EEVblog
author_rank: Unknown
timestamp: July 11, 2025, 04:52:48 am
content: Quote from: cunningfellow on July 11, 2025, 03:15:17 amDon't know the final value yet.

author: cunningfellow
author_rank: Regular Contributor
timestamp: July 11, 2025, 05:34:10 am
content: OK. I am just trying to get some data points to decide if I want to just throw 60kWh of EVE cells in some pre made metal boxes (Seplos/EEL/whatever) or try get a subsidy.The quotes I have gotten are far from compelling.

author: EEVblog
author_rank: Unknown
timestamp: July 11, 2025, 07:09:08 am
content: Quote from: cunningfellow on July 11, 2025, 05:34:10 amI've heard it's $350/kWh rebate. That would make the cheapest of cheap batteries free, not including install which you have to have by a certified installer to sign off on the rebate.

author: IanJ
author_rank: Unknown
timestamp: July 12, 2025, 04:36:33 pm
content: My Solis inverter has been rock solid, but you have to jump through a lot of hoops to achieve local control rather than SolisCloud.com only.But, if you are happy with Solis’s cloud only functionality then it’s fine.I did a video on how to achieve local control and Solis cloud monitoring at same time.If I was buying another inverter it would be Solis again.

author: Marco
author_rank: Super Contributor
timestamp: July 12, 2025, 04:57:02 pm
content: Quote from: EEVblog on July 11, 2025, 07:09:08 amIf it's 48V DC you're at least allowed to do the wiring yourself (absent more local laws to the contrary). So you could probably prepare everything such that the actual work is just showing up, plugging in some connectors and signing the paperwork. Might be some professionals willing to charge an honest price for that.Over here there's a ton of companies who do the final bits of air-conditioner installs for F-gas compliance for instance.

author: brucehoult
author_rank: Super Contributor
timestamp: July 12, 2025, 05:08:41 pm
content: Quote from: Marco on July 12, 2025, 04:57:02 pmYeah, here in NZ you're allowed to do up to 120VDC yourself, so I'm planning my near future panel arrays for my Pecron E3600LFP (2x 30V-150V 20A 1200W MPPTs) to be 119.x Voc, 99.x Vmpp. Three 440W panels in series works out perfectly -- 10% over the W in ideal conditions but that's fine the MPPT will just back off to a higher voltage & lower current than optimum, or get the rated 1200W input with bright sun up to 25º off axis. Or, make up for some of the loss in the wiring :-)

author: EEVblog
author_rank: Unknown
timestamp: July 13, 2025, 01:09:56 am
content: Quote from: IanJ on July 12, 2025, 04:36:33 pmThanks.It support Solar Assitant for monitoring, and the bluetooth interface app seems to do everything required to set it up, so I don't see any need to use or connect to Soliscloud?

author: themadhippy
author_rank: Super Contributor
timestamp: July 13, 2025, 01:43:28 am
content: QuoteIf its anything like the uk then good luck with that as the person signing off the work becomes liable if something goes wrong.

author: Marco
author_rank: Super Contributor
timestamp: July 13, 2025, 03:28:53 am
content: Quote from: themadhippy on July 13, 2025, 01:43:28 amThey are liable to lose their certification.They will be signing off for other contractors too ... many of which are completely incompetent. If they can't trust their ability to inspect the work they are screwed regardless. As I said, it's legal to do the low voltage wiring yourself. The certified installer wouldn't be doing anything untoward by signing off, you would just prepare the work so the parts which they are mandated to do are minimal.

author: EEVblog
author_rank: Unknown
timestamp: July 13, 2025, 09:43:57 am
content: Quote from: Marco on July 13, 2025, 03:28:53 amSigned off, twice!

author: Poroit
author_rank: Frequent Contributor
timestamp: July 15, 2025, 08:42:13 am
content: " Bloody Hot Up Here"I know the feeling.I understand the degree of difficulty, but I reckon those Insulation Batts should be installed up under the Roofing (Metal I guess) for more effect.If I build a house in my next life ,I will try it out.

author: deepfryed
author_rank: Unknown
timestamp: August 20, 2025, 09:16:49 am
content: I'm considering increasing my storage as well, but I'm stuck with a Tesla Powerwall 2 with no clear upgrade options. Do you reckon I could add a different brand side by side and make it work ? I've seen a few people ask the same question online with no clear answers.

author: EEVblog
author_rank: Unknown
timestamp: September 21, 2025, 12:44:30 pm
content: My new system will look like this:Switching to an 8kW Solis inverter, no more Deye. S6-EH1P(8)K-L-PLUS-AU

author: EEVblog
author_rank: Unknown
timestamp: September 28, 2025, 04:57:19 am
content: New reincofrced slab has gone down. Batteries paid for, just need an install time.