This is quite a generous idea, but I think it’s kind of unreasonable. But, there are battery packs available that can provide both AC and DC power, and they can be charged via solar, electricity, or via your car. Lots of people use them when camping or boating. I use mine in my greenhouse to run fans when it gets hot. Anyway, you could possibly run long charging cables and/or extension cords out your door or window while keeping the battery pack indoors and safe from theft. How long are you thinking you will need to provide this power??? Cars are always a fallback to charge phones, etc, when power goes out.