Starting last saturday, I now have been charging and discharging my LiFePO4 ESS for almost a full week
Saturday = Charging all day
Sunday = Discharging all day (with some pauses)
Arriving home, here is the situation: we are at the very end of the charge, the charger is pushing 1A only into the batteries and voltage showing 29V, the cut off is very near
Lowest capacity cells groups shwoing 3.93V and 3.91V are fine, and probably did not reach 4V
Total energy used to charge on monday = 3.3 kWh
Charger is pushing 1A only into the batteries and voltage showing 29V, the cut off is very near
and charger end of charge cut off has now happened: Ampmeter is reading 0A and voltage is slowly dropping from 29V
Charger LED2 is now green, meaning the charge is over (and it will not start again unless the AC side is cut off for 10 seconds, it is a security feature)
Wattson Pro graph for Monday: Charging 07:30-18:40 & Discharging 18:40-22:30
The blue line represents the production from the BESPSS and is almost perfectly matching the usage (in red), unless too high (production maximum output is 1000W for now)
Tuesday: Charging 07:30-17:40 & Discharging 17:40-22:30
After that I moved Karotz to see the Ampmeter too
Tuesday: Charging 07:30-17:40 & Discharging 17:40-22:30
After that I moved Karotz to see the Ampmeter too
Reaching the end of the charge: Ampmeter showing 5A (half and going down) and voltage 28.6V
Timer cut off => Ampmeter is showing 0A and voltage is dropping
Thursday: Charging 07:30-17:40 & Discharging 17:40-auto cut off at 22:45
Overall I am very satisfied with this week of tests:
- Charger work fine (long periods of charge and automatic cut off at the end of charge) and the batteries are now well balanced (no group of cells is going too high)
- Automated power output from the BESPSS is matching the home usage (as much as possible) and automatic cut off is working fine, protecting the battery bank from going to low in voltage
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