Blistovmhz
New Member
- Joined
- Jul 15, 2022
- Messages
- 7
This is my first installation so bear with me.
I've got a Renogy 48v 3500w inverter/charger/controller, 4x 100ah 12v Lifepo4 packs from Jasaki (identical to Sako) wired in series. Got my generator powering the load.
One of the packs wouldn't turn on when I received it. Cracked it open, found the balance lead unplugged. 3 cells were 3.4v, 1 cell at 2.4v . Plugged in the balance (carefulling), and it seemed to charge the cell up no issue (plugged in a 12v panel/controller).
Everything looking good, I wired up all 4 packs in series for 48v and started charging.
Renogy is set to 16string LifePO4 (though I've also tested pretty much every possible combination of user settings at this point), but absolutely nothing I can do to get the batteries to charge at >10a or around 500w. The Renogy is supposed to be able to handle 40a from AC/Util and another 80a from solar. My generator is a 5kw unit and has no problem holding 5k all day, but for some reason, either the Renogy refuses to provide the current/voltage, or the packs are somehow limiting their charge current.
Renogy claims battery input voltage at 54.3v right now. Been charging ALL DAY. 12 hours at 500w average.
1. I don't understand why Renogy seems to be limiting voltage to 54.3. It's always perpetually about 0.2v above the packs total voltage, which seems odd to me? I thought we should be blasting LifePo packs with 57 to 58v.
Am I missing something obvious here, or is there a problem with my charger or packs? Could the packs internal BMS be limiting us because of the single bad (potentially) cell? 10a seems crazy low. I'm used to charging my LiPo's at least at 5-10c minimum. We're getting what... 0.25c right now? At this rate, my tiny 600w PV is making more power than my 400ah batteries can use.
I've got a Renogy 48v 3500w inverter/charger/controller, 4x 100ah 12v Lifepo4 packs from Jasaki (identical to Sako) wired in series. Got my generator powering the load.
One of the packs wouldn't turn on when I received it. Cracked it open, found the balance lead unplugged. 3 cells were 3.4v, 1 cell at 2.4v . Plugged in the balance (carefulling), and it seemed to charge the cell up no issue (plugged in a 12v panel/controller).
Everything looking good, I wired up all 4 packs in series for 48v and started charging.
Renogy is set to 16string LifePO4 (though I've also tested pretty much every possible combination of user settings at this point), but absolutely nothing I can do to get the batteries to charge at >10a or around 500w. The Renogy is supposed to be able to handle 40a from AC/Util and another 80a from solar. My generator is a 5kw unit and has no problem holding 5k all day, but for some reason, either the Renogy refuses to provide the current/voltage, or the packs are somehow limiting their charge current.
Renogy claims battery input voltage at 54.3v right now. Been charging ALL DAY. 12 hours at 500w average.
1. I don't understand why Renogy seems to be limiting voltage to 54.3. It's always perpetually about 0.2v above the packs total voltage, which seems odd to me? I thought we should be blasting LifePo packs with 57 to 58v.
Am I missing something obvious here, or is there a problem with my charger or packs? Could the packs internal BMS be limiting us because of the single bad (potentially) cell? 10a seems crazy low. I'm used to charging my LiPo's at least at 5-10c minimum. We're getting what... 0.25c right now? At this rate, my tiny 600w PV is making more power than my 400ah batteries can use.