Planning a DC-coupled ESS with Multiplus-II (due to grid regulations) and 2 x Pylontech US2000 batteries and Grid Feed-In enabled.
Batteries are mainly for backup (feed-in tarriff works out cheaper than batteries per kWh transferred).
I also want to be able to connect a small generator and charge the batteries during longer power outages when battery SOC is insufficient to last through the night.
If I connect the generator to the AC in, I'm concerned that the Multiplus-II might try to feed-in to the generator.
1. Is there a way to automatically ensure that MultiPlus-II will not start inverting while on generator? Automatically switch it to "Charger Only" and pass-through to AC loads?
2. I could completely avoid the risk of feed-in to generator if I could find a charger that could connect directly from 230V AC generator to the batteries, so the generator would be kind of "DC-coupled"...but what charger would work for this type of batteries with built-in CAN BMS?
I have already read other similar questions like the one below, but the answer there would not work for me because I would really want to charge the batteries from the generator.