12V 280Ah Lithium Battery, 6000+ Cycles 12V 280Ah LiFePO4 Battery, Built-in 200A Low-Temp Protection BMS, Great for RV, Off-Grid Applications, Home Energy Storage, Solar Battery

Edit: charged up. Online, and working fine.Original review:Waiting for a sunny day to charge these 4x280Ah batteries with/for my solar system. At 14 kWh (plus charging inefficiencies) total it is a considerable load on my solar system during these dreary cloudy days.Why would anyone buy this unusually small battery? It is much smaller than one would expect. I bought it for three reasons.1. The LFP battery technology is moving forward very fast. When I bought my first "mini" LFP battery about a year ago I thought I might have been scammed but it turned out to test as significantly better than the standard LFP batteries I had. The timing of these batteries coming out suggests they are the next technology after the minis. This would mean they are better in almost every way.2. The battery manufacturers typically get their cells and BMS boards from factories that specialize in producing them. These factories stress quality so any brand that does not buy factory rejects ends up with very high quality batteries. The prismatic grade A LFP auto battery cells are exvellent.3. This manufacturer has a whole line of batteries, making it unlikely that this is a scam or made of rejected cells.Will update review after next full sunny day which, in Michigan, might be next April!