These systems require little to no maintenance. Because there are no moving parts in a solar power system, there is not much to go wrong. Basically, make sure the modules are clear of bird droppings and dirt and trees aren’t shading the system. Also, make sure the system works by looking at the inverter display and check the performance once in a while. Other than that… keep smiling every time you see the sun and knowing it is working for you all day long.