Seeing what Ray goes through to build his massive DIY packs, I would not even consider building a 100KWh much less 150Kwh pack of LFP's. I could probably deal with the work but I just could not deal with importing so many batteries and dealing with months of waiting, defective cells, stripped threads and all the Scams plus a lack of any long term warranty. Even if I got them locally I would probably still have issue getting roughly 128 x 280A cells that are all working properly to build even the 100Kwh system.
I would do it for a smaller system but not for one that large. Another issue is the Gamble on how long all of these cells will last. Sure I think with weeks worth of work you can get 100KWh of batteries built for $25,000 but those packs will have zero warranty and if they fail in 5 years you will have saved nothing vs buying a $50,000 Pre Built system with a 10 years warranty.
It's a Gamble I would take on a small scale but not on a $25K investment.
You absolutely do not have to go as far as Ray did.
I have my 210,000kwh batteries setup with Kapton tape.
Used a ratchet strap to get them snug then taped them together.
I have been adding on mine for a 18 months but the original pack is over 18 months old with no issues yet.
Yes I have about $26,000 invested in them but so far so good.
At least with these I can replace cells.
I have 4 x 400 AH Global power commercial batteries that if they go bad I’m screwed.
350 lbs each.
The cells are laser welded in.
DIY batteries are not the biggest risks.
Bought 192 cells from Docan Jenny (96) and Amy Peng (96) at QSO for $95-110 each over last 18 months.
Plus the 4 big ones I bought from Jim at Global Power at substantial discount.
That much commercial batteries would have been a non ROI..
You absolutely do not have to do all the crazy compression rigs and everything.
These will last at least 10 years ( Probably longer. Half are LFK280k) and by then hopefully server racks will come down in price.
As far as Warranties go On Chinese Server rack batteries have you ever successfully gotten one replaced under warranty without paying shipping?