I came across these batteries today, what do you think?
aolithium.com
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Aolithium 51.2v 100ah Server Rack Lithium LiFePO4 Battery for Off Grid/Home Backup
If you want to build a huge off-grid solar power system with all the features you can imagine for a low price, Aolithium 48V 100Ah server rack batteries are the way to go. Shop best 48V 100Ah server rack battery. UL Listed Class A battery. 4000+ cycles @85% DOD, 6000+ cycles @80% DOD. 15+ years...
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