Hi,
I have a Multiplus II, SmartSolar and Pylontech lithium battery bank. The "Minimum SOC" is set to 20%, and BatteryLife is enabled. What transpires is that every evening when the 20% SOC is hit the "Active SOC limit" is increased by 5% to 25%. This has the effect that the system uses grid power the next morning, until the batteries are recharged to the region of 30% (25% + 5% buffer) - even when sufficient solar power is available to carry all the loads. The bulk of this grid power use the next morning is unnecessary, since the batteries will almost always be fully recharged by late morning anyway.
In order to avoid this situation I would like to propose an improved strategy for BatteryLife, as follows:
Once per day (e.g. midnight), check the maximum SOC achieved over the past 24 hours:
1) If a SOC of 85% was not achieved, increase the "Active SOC limit" by 5%
2) If a SOC of 95% was achieved, reduce the "Active SOC limit" by 5% (but not below the "Minimum SOC" setting)
By not bumping the "Active SOC limit" by 5% every evening regardless of SOC history, much of the unnecessary grid power use the next morning is avoided.
Is this doable?
Thanks,
Pierre
