After acquiring a set of solar panels, there is just one thing you need to keep doing to make sure the electricity bill stays low over time, and that is to clean your solar panels. Due to the nature of dust-gathering over time and the occasional bird-poop droppings, your solar panels are destined to decrease in performance over time. The upside of this is that you can prevent any serious decrease in performance with an occasional wash. Of course, this is not something that you need to do every week but rather something that needs to be done every 4-8 months, to ensure maximum efficiency and bang for your buck.