I've found a year round use for my deer hunting cart. Right now the setup is 60 watts solar (12 volts in parallel), cheap pwm controller, jumper cables with shut off switch, 12 volt cigarette socket, and 400 watt pure sine wave inverter (12v DC to 110v AC). The battery is 125 Amp hour flooded deep cycle battery. If we have a prolonged power outage now we have the camper solar charged deep cycle battery, this portable unit, and a gas generator. We have options and can get by for few days anyway.