solarhombre
New Member
Hello,
Something strange happened today.
I topped off the 6xEG4LLv2 batteries earlier today and then started running off-grid with the 2xEG4 6500EX disconnected from the grid. AC was on and off all the time. A few minutes before 4pm one of the inverters peaked at ~120A which is what I have configured as maximum draw from the batteries (AC running (1/2), microwave and water kettle on the same leg probably did that). At that point 2 breakers tripped but I did not notice until ~4.40pm, which is when I went to take a look, and reset the breakers. Both inverters had 'bp' flashing as if they did not the battery monitoring connection so turned on the grid connection. Turns out all the batteries were drained to 0!? They are happily and slowly charging now.
What I don't understand is the drop from SOC 54% to 0% that suddenly happened at ~4.40pm. I'm attaching some screenshots of the monitoring data showing things like the minimum cell voltage dropping from ~3.15 to 2.75 for all the cells(!?) in an instant, the power delivered by the batteries in the few hours they were connected (~15kWh out of 30kWh for the six of them),...
In case it's relevant, I don't run on batteries often (once or twice a month drop then to like 70% and then charge them back up to 90%), no solar connection, and the batteries are usually on (all green LEDS are on, but batteries not in use). The system is almost to the date 1 year old.
Any idea of what happened here?
TIA
Something strange happened today.
I topped off the 6xEG4LLv2 batteries earlier today and then started running off-grid with the 2xEG4 6500EX disconnected from the grid. AC was on and off all the time. A few minutes before 4pm one of the inverters peaked at ~120A which is what I have configured as maximum draw from the batteries (AC running (1/2), microwave and water kettle on the same leg probably did that). At that point 2 breakers tripped but I did not notice until ~4.40pm, which is when I went to take a look, and reset the breakers. Both inverters had 'bp' flashing as if they did not the battery monitoring connection so turned on the grid connection. Turns out all the batteries were drained to 0!? They are happily and slowly charging now.
What I don't understand is the drop from SOC 54% to 0% that suddenly happened at ~4.40pm. I'm attaching some screenshots of the monitoring data showing things like the minimum cell voltage dropping from ~3.15 to 2.75 for all the cells(!?) in an instant, the power delivered by the batteries in the few hours they were connected (~15kWh out of 30kWh for the six of them),...
In case it's relevant, I don't run on batteries often (once or twice a month drop then to like 70% and then charge them back up to 90%), no solar connection, and the batteries are usually on (all green LEDS are on, but batteries not in use). The system is almost to the date 1 year old.
Any idea of what happened here?
TIA
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