Home Page Solar Hot Water SHW Performance data Grid connect PV Solar Electricity Links

picture of our house    

Welcome to my website, these pages give details of the solar systems we have installed in Stonehouse, Gloucestershire and records of the outputs we have got from them. The solar hot water system was installed in September 1999 and the PV in March 2004

Our house faces 40 degrees west of south, but the PV has still managed to produce around what was predicted for a south facing roof. 5th Sept 2016 saw us pass 20MWs of home generation. PV typically produces 75% of its annual output over the 6 months through summer when the sun is higher in the sky, and the remaining 25% over the other 6 months. Good Energy pay us 9.9p per kWhr for all our electricity plus 4.5p for 50% of total generation assumed as exported, we get this rate as our PV was installed before the Feed In Tariff was announced. If you install a PV system now you could get around 4.5p/kWh plus 4.7p/kWh for the 50% assumed export, but the generation payment rate is reduced each quarter so this figure is approximate.

By March 16th 2016 we have generated as much as imported this year, which was within a few days of last years date

2016 Monthly details:-
January -A very mild month and just below average generation (45 kWh, avg 49 kWh)
February -A cooler month, but sunnier, the second best February since system installed, with well above average generation (84 kWh, avg 72 kWh).
March -A cloudier month that came out just below average generation (130 kWh, avg 136 kWh)
April -A very variable month and quite cold that also came out below average for generation (174 kWh, avg 184 kWh)
May -A fairly sunny month came out just average for generation (204 kWh, avg 197 kWh)
June -A very overcast and wet month after a good start. Well below average for generation (179 kWh, avg 210 kWh)
July -A fairly hot and sunny month which came out just below average for generation (203 kWh, avg 206 kWh)
August -A hot and sunny month which came out above average for generation (189 kWh, avg 179 kWh)
September -A hot and cloudy month, record temperatures but well below average for generation (132 kWh, avg 150 kWh)

Full details on Grid connect PV page or for solar hot water stats look at SHW performance page

By 8th April 2016 we earned as much from our electricity as we owed on our electricity bill. Technically from then on we were in credit for our electricity bill, despite not getting the full FIT amount as weekly generation exceeds import

The solar hot water system produces over 70% of the hot water used in this house. It produced 100% of the hot water from early March to middle of September in 2000. Proving to us that solar power really does work in England. We normally turn the boiler off for around 5 months in then summer each year. The solar hot water system was installed as a DIY installation, but the Renewable Heat Incentive was launched April 2014 for domestic properties which will pay you for the hot water you generate if the system is installed by an MCS accredited installer . Our house faces approximately South West which is not the optimum direction, but even so water temperatures in the summer regularly reach over 60 deg C and in the middle of winter on a clear frosty day we have got the water heated up to over 40 deg C even though the air temp is below O deg!!!

  I hope you find this site interesting, please email me if you have any questions or comments.

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