A good solar panel is an additional alternative energy source that allows you to power multiple appliances or even an entire heating system. Also keep in mind that in addition to the panels, you will need a battery, controller, inverter converter, terminals, and fasteners to make the solar panel work properly. Or you can buy solar panels for campers https://a1solarstore.com/blog/solar-panels-for-campers-the-basics.html, which is a great way to learn about an alternative energy source.