If I understand your point then I'm going to pay $125-$250/ kwh for a cell, that's going to run $1250+ for the cells, plus a BMS which I'll guess will be at least a couple hundred, plus a case and wiring is going to run me around $2000+ if I'm guessing correctly for a 10kwh powerwall. The powerwalls I'm looking at from China are running me $2400 (plus shipping of course) each and that's assembled in a nice little, pretty looking package. I would also have to assume since I don't know the difference between a LFP cell and my ass then it would probably be put together better and safer than I would do it myself, unless the factory in china employees monkeys. I would also have to assume that if the LFP cells that you're suggesting are from china then GSL will probably be using the same cells that I would use in the powerwall. Please don't get me wrong, I'm not trying to be an smartass, but please explain why you think going the LFP cells and self assembling the battery pack is a better option. The reason I was leaning toward the Bigbattery option was it was suggested by Will Prouse on youtube on a video or two of his. I found the GSL Energy battery powerwall on Alibaba myself and after several weeks of talking with several companies I liked them the best and I like the idea of having a brand new product vs the 'rebuild' of the Bigbattery. Since I'm new to solar I was trying to get the easiest and safest system put together that I could without having to screw up building it and burning my house down. I'm willing to pay a little more if I'm getting quality and safety in return. If you think the self assembled option with the Chinese LFP cells offer me more longevity at a safer level then that is a route that I need to investigate instead of ordering the powerwalls.
The BigBattery boxes are used if I remember but I will read that whole thread. I have no way of knowing if the cells inside are the same. All I can tell you is they are all made in China anyway but what I do know is the Grade A stuff goes into EVs and some of them trickle out as generic Grade A. There is a whole 45 page thread about the particular cell I am buying.
If you don't mind me asking, how much are the 28kwh of LFPs you are buying going to run you? is it as easy as connecting them together, putting them inside a metal case, and attaching a BMS? It sounds too simple so I must be missing something. Also, what is a good BMS and around what's the cost?
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Those cells cost $3,335. Ping my on the other side and I can send you a copy of the order.
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