The BMV 712 manual gives a C20 Ah setting as a rule. But in a self powered house, I never get under 80% soc in 24Hours which gives a C120 setting eventually C60 for peak load hours. On rare days I may be down to 70%SOC which gives C80 and C40 for peak hours.
Using C20 as advertised leads to SOC being overvalued and power intake being limited.
Should we not use C120 instead?