>>1882071The power figures you read for PV-panels are their peak power.
To achieve peak power they need a lot of sunlight.
They don't always get a lot of sunlight.
It's dark at night, but also just a cloudy sky can drastically decrease how much power the panels can output.
Therefore, the panels will output significantly less overall power than their rated power x time.
How much power they output, relative to their average power, is shown in this graph.
To smooth out weather-influence, it's using the years 2014-2017 for this calculation.
Additionally, the grey bars show how much peak power is installed in which of the given US-states.
