Your generated power goes back into the CMP grid (except for what you are using at that immediate point in time) and CMP delivers it back to you. So you pay for the connection costs (mine is about $14/mo). CMP does not cut checks, you only get a kWh credit that expires 12 months from when it was generated. So you end up producing more in summer due to longer days and higher more direct sun, and then rely more on your credits during the winter months.

Now, you can also get battery storage for your produced energy, but you'll still produce more than the battery can store and you'll still have to pay CMP for the line connection.

Side note - 7-8 years break even, as well as a house value bump is a great investment.