Okay, I've got a data point - an architect I know who lives in New Jersey has a 9.9kW solar PV system (44 225W Sunpower panels) and in 40 months of operation, he has averaged 750kWh/month, and that averages 75.75kWh per kW of maximum capacity per month.
So, the 1MW system (which is using 240W panels so that means ~4,167 panels in total) would have about 75MWh output per month by this estimate, or about 900MWh per year. So, the number in the 2010 Beacon Villager newspaper was probably correct - except for the units.
The article said 1,125 MW but they had to have meant 1,125 MWh or 1.125GWh.
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