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I have a renogy system (1)40 amp mppt (4) 100w. Panels connected in series (4) lithium iron batteries in parallel (1)2000w inverter (1) 20 amp dc to dc charger My question is after I have battery connections in parallel to a (4) stud post negative and (4) stud post positive I go directly to...

Do you need to add a bms system to a lithium iron phosphate batery bank x4 -12v. ?

Does anyone know about the renogy lithium battery loose bolt and terminal issue? The #8mm extra fine bolt threads 1.25mm and the terminal socket are not a great fit. Its definitely 2 different sizes. Probably a cast issue? The bolt is really loose and if I tighten theres no torque specific...

I have 4 renogy lithium iron phosphate batteries that are to be bms protected already. Do I need to add a external bms?