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Understand, @Andyhe1988 . Do you have pictures? Can you elaborate on the terminals?

These are fascinating to me. How do the terminals work? I looked all over the BYD website and couldn't find any specs or drawings indicating how you could DIY a pack with them. Anyone know?

There are details that are missing from your post that inhibit it from making any logical sense. Can you elaborate further?

Excellent. In the scenario above, is there a transfer switch that you guys would recommend looking at?

Thank you. Tell me more about the manual transfer switch and now it would be wired to allow either the grid or inverter output be the power source of my existing 200A house main panel. I think that is the part my head is not clear on. To me the problem with the LV6548 is that it takes two of...

Hello Everyone, I have been doing solar/lithium in vans for quite some time and am finally to a point where I am ready to dive into setting my house up to be self-sustaining. Here is my plan, in phases. I have been using an Emporia to monitor my energy usage. Luckily I am in the NW and have...

@Sunfunkits Sounds like a great opportunity to do a group buy. I am sure the enthusiast community would love to support your small business growth and minimize your out of pocket costs towards inventory, if it was done at the right price. People pay a deposit and then the rest is paid when you...

I haven't seen this external relay version before nor can find any reviews or usage. Anyone seen this in use? https://www.aliexpress.com/item/1005002859512726.html

Would you mind sharing the assembling instructions? Curious what they recommend.

Link? FYI, we're talking 304 not 280, which is clearly more expensive.

Do you mind sharing what Amy quoted you?

Any updates on your transaction and experience?

@LiCurious Can you tell me what the dimensions of the black cell holder are? I am curious how large a pack like the one on their website would be.

Did you reach out to the vendor and show the pictures and get their input? May be a useless endeavor but I am curious what they said, if anything...

Nice. Any reviews or videos that you are aware of? I am looking at making three parallel strings of 16s/48v/EVE Grade-A 280Ah for a DIY powerwall and using one of the 200a bms on each string. If the videos I've seen are accurate, this BMS should be able to communicate to a Growatt Inverter.

Any updates from real world user experience?

Huge following here....go read until your eyes are crossed! ;) https://secondlifestorage.com/forumdisplay.php?fid=31&page=4

Battery protect only cuts low voltage, not high. Correct?

Victron Smart MPPT 100V/30A (450W of solar, parallel, on the roof) Victron Smart Battery Protect to control low voltage disconnect. I bought the 220A version and then read how to not run the inverter through it but use it to cut the "remote" about a week after I had the part in my hand but used...

I have them in my van. Had them for about six weeks. They test slightly above advertised capacity. I have induction cooktop and a 2000W inverter and they handle it with ease. They came balance charged and matched resistance. No regrets thus far.

I only have 8 and they all tested individually fine and slightly better than advertised capacity and have been working great in a 2P4S pack in my van.

I'm happy with mine! The 150Ah come from a different cell manufacturer than the ones gehowi received.

What does GFB stand for? Do you have a link? Google wasn't overly helpful.

@Will Prowse Can you override the auto-sense alternator auto-on and use the Switched ignition input and the unit only uses that? It looks like there's terminal's for it. There is a decent amount of people that use switched input to control charging through their BMV-712 for low temp, etc...or to...

Nick work. Engineering tests are never pretty! I'm an electrical engineer and I can tell you most of the time they're borderline safe too! Ha. What liquid is in the barrel now? Water?

Super interesting thread @Maast !! I look forward to seeing your results. Any idea when you will be in a position to share the data and experience?

2P 4S

Yes, I use the relay contacts on the BMV to disable charging from all sources at low temperature, under voltage, over voltage and midpoint voltage deviation.

I JUST installed a BP-220 last weekend doing it the wrong way! Time for a rewire. The directions that came with mine didn't show or mention this. The updated manual, linked above, was updated last week! Hot off press. Thanks for sharing!

I ran my Magnum Dimensions 2000w inverter at full load for two hours off of this pack to stress test it and measure temperature on my connectors, crimps and wires. Batteries didn't raise more than 8F degrees. That's 130ish amps. I think you're under estimating them.

https://www.aliexpress.com/store/4996353?spm=2114.12057483.0.0.7e0c2ea60ldkHL

I am using the Deligreen active balancer, it does very well. The top left is the Victron 120v charger. The other is the Victron Battery protect and MPPT. Theres a BMV-712 shunt in there too. Its under the dinette seat in my van. Tight space but works.

I purchased 8 of the 150Ah blue aluminum cells from BLS on Aliexpress and they've tested slightly higher than rated capacity.

If you're not charging it via the alternator then there is no need.

Happy to help. This was the only one I found. https://www.banggood.com/G_T_-Power-Bluetooth-Battery-Care-Tester-Battery-APP-Display-Monitor-for-2-6S-Lipo-Battery-p-1379726.html?ID=557633&cur_warehouse=CN...