Yes. The generator can recharge the battery whenever necessary. However, it is generally not required to start the generator for the operation of any of the household appliances on board. It is also not required to start the generator for higher cruising speeds. It merely functions as a emergency back up in case you travel long distances at high cruising speeds without sunlight as this could possibly deplete the battery reserves. Nevertheless, you can still go for 12 hours solely powered by the batteries even during the night at 6 knots speed.