With Solar you are harnessing the abundant power of the Sun. Which means if you have sunlight you are generating power.
Choosing to go Solar can allow you generate power to charge your battery bank or generate power to consume directly. Your model will depend on what is best suited to your situation.
Solar panels have a very long lifespan so you can move them with you as your life evolves.
Whether its a 20W unit or a 200KW unit there is value at every stage.