My dad was a super super early adopter with a tiny 2kW system that cost him about $20k, but he has a grandfathered feed-in tariff of about 50c/kW. I'm pretty s

My dad was a super super early adopter with a tiny 2kW system that cost him about $20k, but he has a grandfathered feed-in tariff of about 50c/kW. I'm pretty sure he hasn't actually paid for electricity or gas (same provider) since.