Why wouldn't you buy this 45watt Solar System for $149???

As others have said, to big as a maintainer and too small to be of use for dry camping.

For around twice that you could have a simple set up like ours. A 230w panel, a controller and 25 ft of extension cord between the panel and controller. With it we run the things you mentioned plus the furnace, fans, a small inverter, all using a single grp 27 battery. I hope to get a bigger inverter for running the microwave and such with the bigger battery.