We went to the RSPB nature reserve at Leighton Moss. Here's their solar panel display. I last posted about this in December 2009. Then they had generated 8749 kWh of energy. So in 4 years and one month they have generated an extra 5557 kWh. That's about 1490 days. Assuming an average of 12 hours daylight every day that means 17892 hours and thus an average of 0.3 kW being generated. 300W is not much but I forgot to see how big the roof panel area was. That said, at say 10p a unit, it is £500 of electricity.
By the time we left the café it said it was generating 0 kW. This is the light level that generates no solar electricity ...
