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I should add that I'm not sure this post belongs in the DIY Powerwall forum; if a more suitable forum seems appropriate, please feel free to recommend.

Hey, DIYers. TLDR; With a 200A Eaton Bussmann 187-series circuit breaker/switch for primary portable DIY battery box protection, and using Anderson PowerPole 120 series connectors for an external panel mount inverter connection, would you add a separate 187-series breaker/switch on the inverter...

Has anyone ever seen an interrupt current rating listed on a BMS? The general wisdom seems to be that a BMS isn't designed to protect in this manner.

Apropos of your comment, DIYRich, when I built my first battery box and added a DC-DC boost converter to interface my vehicle alternator to my Victron 30A MPPT charger, I first tried inline thermal breakers such as this 50A unit: https://www.amazon.com/gp/product/B077CYP41V . I found that they...

OK, thanks!

Truer words... If support will ultimately be provided by Epoch, why would purchasing from a reputable distributer be better? Do distributers actually facilitate support in this wild west environment? And, can you recommend any such? Glad to hear the batteries are working out so far.

That's great. I aspire to running a clothes dryer off of a battery bank. Someday when I'm no longer an apartment dweller... In the meantime, just a 1500W hot water urn while camping. Thanks for the drawings, zonnigBreda and zcskywire2. (It's still amazing to me that EVE doesn't include the hole...

LOL. You should open an eBay store! One question: It looks like you have (2) 7AWG wires in and out of your BMS, which is effective 4AWG. Why did you use 2/0 from the battery to the negative post? The Blue Sea Circuit Wizard reports 160A capacity for 4AWG over 1 foot, for reference, but 330A for...

I was considering those flexible cutting boards, or perhaps silicone baking sheets, then found sheets of Kapton tape with silicone adhesive for 3D printer beds (by Gizmo Dorks) that is just 1mil thick, with 1mil adhesive, that I plan to use for my metal end plates and other aluminum supports...

Just getting back to this: Yes, yodamota, setting float to lower than battery's resting voltage works.

Thanks for all these spot-on notes, Skypower; and that's a beautiful build, thanks for the pics. Your 20mm studs look perfectly suited. I also see that you crimped together the positive BMS lead with the last balance lead, which I had a question about. What did you use between the cells? When...

Glad I saw this thread. I was briefly considering Epoch 12V 105Ah - Group 24 (12105A-H). Epoch 12V 105Ah spec sheet and data sheet have different numbers: e.g. "charge voltage: 14.2" on data sheet, "charge voltage range: 14.0-14.6" on spec sheet, with recommended charge 14.4 there on page 2; max...

Anyone else able to provide hole depth? Unfortunately, 18650batterystore has been unresponsive to email in the last few months. DIYrich, I'll be using the LF230 cells, which are a different width than the LF280K. I was planning to build my own busbars out of 1/0 AWG that I have on hand, with...

Another spec request: what is the actual depth, in mm, of the two-hole terminals? (This, too, is missing from the literature.) I'm trying to plan the minimum stud length I need to fit the project.

I'm expanding this discussion to include EVE two-hole terminal contact options. I'm not excited by the limited surface area of the two-hole post as displayed on e.g. 18650batterystore for the LF230: That seems fine if you're going to use two-hole solid busbars across the full length of the...

NP, maybe I'll post in a better context for broader notice. Not critical!

Seems like you answered your own (rhetorical) question? ;-) I'll probably buy from Hankzor/AliExpress in the end, after reading about there being no way to reset back to default password if you forget the private one you set, without some code from someone. I mean, I use a password manager to...

Thanks for this info. I think I'll give it a shot. One more question: do you know/can you measure the width of the two terminals together on each side, from outside edge to outside edge, and center to center on the terminal holes? I'm planning to fabricate an adapter from copper bar stock to...

I, too, am getting closer to a new build. It will be my first prismatic version. I currently have an off-the-shelf Relion with built-in BMS that's failing after 3.5 years, in a DIY emergency power box in a Pelican 1460 case. Fun COVID project, that! I'm looking forward to separating BMS from...

Sadly, when I called today I got the same person that I was emailing with, and she said they had to rely on the warranty department for the decision. So I left a message on the warranty person's vm, and did not hear back today. Not especially hopeful. That charge curve graph is illuminating...

That sounds pretty close to 0.63, as eyeballed at 11/16 (0.6875). If not a perfect fit at 0.0575 difference, I can always dremel it a wee bit to fit. Thanks, DIYrich.

I've been unable to find a CAD drawing of the EVE two-hole terminal. The spec sheets show the spacing of the positive and negative terminals, and I've seen the spacing of the terminal holes from positive to negative, but the center-to-center hole spacing of the terminal holes in one terminal has...

Thanks, mikefitz and MiSh. MiSh, fascinating experience, mine very different: I actually did submit a warranty claim, and they referred me to their three-year free replacement policy, followed by offering to sell a new one in year 4 at 20% off. Who did you speak with and what did you say? This...

With a failing ReLiON Group 31 LiFePO4 12V 100Ah battery at 3.5 years despite regular and reasonable use, I'm disabused of costly batteries with built-in BMS and exaggerated claims about expected longevity and number of cycles. I'm now planning v2 of my DIY portable power box with a 4S prismatic...