Due to the fact that they can work on their own, microinverters are usually able to provide a higher production rate than string inverters - here. No two panels are identical. Also, solar panels can vary in their production rates over time.

Your home's average energy consumption is the first thing to determine how much solar energy you need. It shows how much electricity you use each month. You can also get an idea of how much energy you use each month by dividing your utility bills' total consumption by 12. This will give you an estimate of how much solar panels will generate each month - here.