Saturday, 21 May 2011
We have employed the same contractors to do the work as for our solar thermal panels and heat pump.
We chose the Sanyo Hit 250W panels and have installed 12 of them. They should have a theoretical output of 3kWh peak.
Here is the roof with the brackets in place before the panels were attached.
When the system was connected within the house, we were amazed to find that it generated 3kWhp when the sun shone. Apparently there is often a drop-off of up to 20% but not with these panels. Having a good angle on the roof helps, without shadows from trees or other buildings.
We are very happy with the results. The first day we generated 13.5kWh, and yesterday we generated 12.8kWh even though there has been a significant amount of cloud cover! We have been charging everything and using the washing machine the minute the sun comes out!
The good thing is that with our low-energy house, the demands for energy are relatively low (even with three teenagers in the house). The installation of the photovoltaic panels to generate electricy should allow us to get sufficient income from the Feed-in tarriffs to cover the cost of our electricity the rest of the time when there is no sun. Net result: no bills!