I’m using chargery coupled to their DCC, and noticed something the other day... when charging the battery from a morning star charge controller, I noted that the charge side of the DCC was shutting off. Battery voltage was about 3.23v per cell and no cell was anywhere near 3.6 yet the BMS was commanding the DCC to stop charging. I watched the chargery display 30amps charge current, then 0 for a few seconds, then start charging again. I verified the behavior with an amp clamp meter. I’m typing this from memory, but I have not changed the high voltage cut off on the BMS from it’s 3.65v setting.
The battery is 16s of 280ah LFP cells. I think the bus bars they sent with the cells are MUCH too small, 15mm x 1.2mm, and have some 4mm copper on the way... but not here yet.
So I kinda blew off this BMS charge stopping behavior and went forward with using my sunny islands to run the house.
I experienced a problem twice today. My pair of 6048 sunny islands glitched with an error message of voltage of battery exceeded followed by the inverters shouting down their 240v output For about 5 seconds. Now I know that the DCC shutdown power TO the inverters they would NOT auto restart... instead they shut down outut for 5 seconds and restart. Makes me think that the sunny island charger was pushing some amps into the battery when teh DCC shut off teh charge direction and that caused an inductive spike on the sunny island side.
So what do you guys think? Is the DCC shutting off charging direction causing my issue? This happens randomly and Its impossible for me to run to the basement before everything resets. The only record I have is the fault log in the sunny islands.
The battery is 16s of 280ah LFP cells. I think the bus bars they sent with the cells are MUCH too small, 15mm x 1.2mm, and have some 4mm copper on the way... but not here yet.
So I kinda blew off this BMS charge stopping behavior and went forward with using my sunny islands to run the house.
I experienced a problem twice today. My pair of 6048 sunny islands glitched with an error message of voltage of battery exceeded followed by the inverters shouting down their 240v output For about 5 seconds. Now I know that the DCC shutdown power TO the inverters they would NOT auto restart... instead they shut down outut for 5 seconds and restart. Makes me think that the sunny island charger was pushing some amps into the battery when teh DCC shut off teh charge direction and that caused an inductive spike on the sunny island side.
So what do you guys think? Is the DCC shutting off charging direction causing my issue? This happens randomly and Its impossible for me to run to the basement before everything resets. The only record I have is the fault log in the sunny islands.