We received our first 'negative' electric bill yesterday.
We've produced more power than we've used since late August. I already knew that but the power company estimated our meter readings for the previous bill so I didn't have it in writing from them. I also figured they'd nickel and dime the surplus away with fees and charges (which are a surprisingly large part of the average electric bill) but it still came out way negative.
Credit Balance - Do not Pay $ 100.38 CR