Connected this inverter to Nissan Leaf 48v and 6kWh batteries. While not very efficient at high load or no load, it manages to solar power my entire garage. It starts my fridge with no problem, but has trouble starting my large air compressor and lathe. Sometimes I charge it almost to the maximum load for several hours. The fans are begging for death and it will eventually give up if the ambient temp gets too high, but it usually produces near max power for 6+ kWh.