I see it set up as a co-op, with the electricity generated to "my" panels being applied to my usage, for 20 years. The numbers in my particular case actually break even at 4 years, but I am checking the numbers carefully. This is close to the too-good-to-be-true category, so I am looking at it carefully. My wife worked at this company for years, from a meter reader up to an exec position in accounting. The numbers are based on kW, not dollars. If I use more, I pay more, and less usage means refunds. This leans to their favor. They use rates that are low for their refunds. If I did it myself, there are added costs of batteries, an electrical shed, separate from my home, using land that I can use for other purposes, and my time, which has value. If I built this, it would come in at about the same cost for materials alone. I purposely overengineer my stuff. TMI alert. Climate change caused disasters has cost me two homes. (flood, then wind) My house "codes" are aimed to European standards, and intended to last for lifetimes. I am a natural disaster prepper. edited a phrase to make it cleared to understand.