I like the fact that it's a complement and doesn't interfere with other properties of the solar system; My inverter can also act as a battery charger but you must be careful to isolate the load applied to the inverter or it may overheat. This charger allows me to use the generator and recharge my batteries after a cloudy day without any disruption or hassle. If you buy an all-in-one inverter charger, you could damage something if you try to charge and invert at the same time. With this charger you can easily charge the generator at any time while the inverters are still running.