Solar is a reliable technology. It has no moving parts. There is not a lot that can break. But like all appliances, we do see manufacturer defects from time to time. And the system as a whole may need service at some point. We recommend you set aside a small budget for inspections every 3 to 5 years and eventual service work. After all, you expect to service your refrigerator or washing machine at some point, right? And those appliances aren’t sitting outside in the elements every day!