Hi I'm looking for some help to understand the best way to trigger the DC Input Low Shutdown on my MultiPlus 3000VA from the BMV712.
I am off grid, solar charging Lithium Smart batteries with an MPPT 100/50, and use a small inverter generator to feed the MultiPlus when solar charging is insufficient.
I would like to limit battery discharge to 15% to maximize the life of the lithium smart batteries.
I've tried tuning the DC Input Low Shutdown voltage settings in the MultiPlus but found too much variability in the actual SOC when the DC Input Low Shutdown is triggered. For example, when a relatively short duration, heavy AC load is applied to the MultiPlus, the DC voltage will drop, triggering the DC Input Low Shutdown at a SOC much higher than if a small continuous AC load is being fed by the MultiPlus.
Attempts to use the battery monitor function of the MultiPlus and the corresponding SOC functionality to trigger shutdown did not work because the MultiPlus SOC is not accounting for the MPPT charge current.