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Topic starter
March 4, 2025 12:17 am
Since my last post was deleted. I’ll try this again. The condensed version is my 3 new V2’s are charging and discharging at half the amps of the other 9 V2’s. They are firmware updated and wired correctly both to the bus bar and to the inverter. I established that in the deleted post.
Jlankford, I don’t know if you saw what I posted but I was running lithium on volts forever and was informed by SS on Thursday NOT to do that. It makes sense to me too. No real explanation why. I’m deep cycling mine now down to 47 volts and will try to get them up to 56.4 or so on Wednesday when we have good sun again.
Topic starter
March 4, 2025 6:48 pm
@eric yes they were around .2 volts difference so well below .5 volts.
So if the batteries are in lithium mode should or we shouldn’t run in voltage mode? SS said they would only cycle properly in lead acid mode. When I’m done cycling them in lead acid mode 7 or more times and switch back to lithium does EG4 recommend using SOC? Thanks
March 5, 2025 9:20 pm
Yes, charging by voltage in lead acid mode would be the best approach. I’ve attached a document that explains how to properly top balance the batteries.
Switching back to SOC control should be fine as long as everything is communicating properly.
Is the inverter reading all the batteries?
As long as you're charging them to 100% and discharging to around 20% a few times per month, you shouldn’t experience these issues again.
Topic starter
March 5, 2025 9:31 pm
I’ve been in lead acid mode trying to deep cycle them so it doesn’t show them. I’ll get the BMS test done tonight and look at them. Phillip and I will probably talk this week. He is curious about what is going on.
my whole problem with SOC is when I deep cycled the original 6 batteries 7-8 times the showed 0% at 47 volts. I thought they should’ve read 20% at 47 volts. That’s why I left them on volts. I was afraid to use SOC but I should have and told the generator to start at 0 or 1% I guess in lithium mode
March 6, 2025 7:22 pm
47V is definitely not 0%, but it is considered below 20%. Voltage is a more accurate reading because the inverter measures it directly from the battery. SOC, however, is estimated by the battery’s BMS and can sometimes be less precise.
The reason people choose SOC, is because it does communicate with the inverter and if something is wrong with the battery, the inverter will let you know. Instead of having to be checking on the battery every time through the BMS Tools software.
Topic starter
March 6, 2025 7:29 pm
@eric , so is SS right when they say Do not run lithium mode by volts?? Will that damage the batteries or inverter? I know a few guys that need to know the answer. Thanks
