EVE MB31 3.2V 314Ah 4pcs LiFePO4 Cells Battery Grade A Lithium Iron Phosphate Deep Cycle, Power Supply for RV, Boat, Golf Cart, Motor, UPS, Fish Finder, Lawn Mower, Off Grid, Solar Systems

Good

So far so good. Bought three sets of 4 batteries each. Shipping foe the last set was delayed by a couple of weeks due to availability. I assembled each 12V battery with a BMS and tested @ 25 Amp Discharge rate and ended with a 11.1 Volts at BMS(-) and Battery (+) terminal. The lowest tested at 288AH the highest at 292AH. There are many variables that could account for the slightly low test, so I am assuming that I undercharged by a bit, stopped the test at too high a voltage or my equipment is not accurate enough. One cell was slightly fatter than the others otherwise the physical condition was good. I haven't put them into service yet, so I will update later if I find anything noteworthy. My Application: Marine Inverter application 3KW Inverter (Freedom SW3012) with 150Amp Charger Configured cells as 3 parallel at 12V(4 Cells) Daly 200 Amp BMS with parallel module. Update 5-2023: I installed a 200Amp breaker/switch on each battery in order to be able to isolate problems on the fly and to enable troubleshooting/testing. I reprogrammed the inverter/charger for this battery/BMS combination. The inverter charges at 150 amps with no problems with 2 or 3 batteries in parallel, but with one battery it becomes unstable and the inverter/charger trips with an "over voltage" error message. If anyone has any ideas on this please let me know. So I have one cycle on the installed system and am ready to try it out for real. I will update if I learn anything new. UPDATE 3-8-2024: One cell failed down to 2.4Volts, others on the same BMS were 3.2Volts. This is frustrating since this vendor does not sell single cells. I know it is not advisable to use cells of different ages; but $600 because one cell failed?

Batteries came in a well packaged box and delivered early. I used a JK BMS to maintain the right voltage in the 4 batteries. I replaced the 2 AGM batteries in my RV. This upgrade was equal to 6 AGM batteries.

Muy bien