Have them all. Wood, propane, generator and a small 450 watt solar panal. The solar panels will work but requires long periods of sunlight to charge the batteries, sometimes not always dependable and costly also. A 4000 watt honda generator is great for a back up and will be and can be used to charge up your battery box.There fairly quiet with todays models and are good for running power tools. You can use it to tapp into a couple ciruits in your house. !2 volt bulbs work good too as well as kerosene lamps and candles and propane lights and mantles.
I lived in the bush off the grid for 5 years in B.C. and that was my set up. Good luck, Bobby