Our air conditioner can run on batteries, either on or off the grid, via an AC to DC converter that is also neatly built into the unit. This unique futuristic design means that, as long as the sun is shining, the air conditioner continues to run on solar power, delivering users 100% free air conditioning during peak sun hours. In addition, our design captures 60- 80% solar power on the other off peak sun hours. There’s nothing more efficient than that available anywhere else! Includes an internal solar charge control, optional external batteries can be installed (eight 6volt batteries). Can also purchase two 110v inverters to run on AC power. Unit is able to run all three at once (Solar panels, battery and 110v). 110v inverters can be purchased by calling 855-308-8889.