So, this has been asked before: https://community.victronenergy.com/questions/91604/limit-battery-charge-current-from-grid.html
But I'm piling on with a related problem: In Cape Town, grid-tied hybrid (i.e.ESS-like systems) are not allowed to charge the batteries from the grid by more than 25% of the main breaker capacity.
So, for a 60A breaker, I need to limit the grid usage for battery charging to 15A. I know I can limit the charge current and it will work fine when combined with DC-coupled MPPTs which can charge the battery directly with no limit.
However, in my case I have an AC-coupled Fronius on the output of the Multi, so I want the Multi to charge at full capacity when using solar, and 15A when those amps are coming from the grid. It does not seem possible to limit "grid amps for battery charging" in that configuration. Everything limits the entire charging process or the entire pass-through current, even from solar.
Any way to achieve this?
(In ESS, charging from the grid is rare, but when it happens I need it to be limited to 15A to comply with regulations, without harming overall system performance.)