Most of our off grid customers use Hybrids as they can use the air con all day to keep cool or warm and if they need it at night they can flick a switch and use their existing power system to run it at night. This way they are guaranteed to not deplete their batteries from the air con while it runs during the day. The amount of night operation will depend on the size of their existing power system. Alternatively, simply keep the power connected so that it always prioritises the solar panel power first and adds what it needs if the solar power is insufficient.