I have an electric AC in the window. Is there any cheap and easy way to run it on solar power? The AC unit is on the north side of the house. I have seen battery- maintainers at auto part stores. Can I buy one along with a deep cycle battery and an inverter to make my AC run on solar power? How many watts does a window AC need? I would really appreciate if you can help me with some useful information at the earliest. Thanks.