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kW - kilowatt is the unit usually used to express the generation or consumption of power (including electricity). A small one bar electric heater consumes 1kW. kWh - kilowatt hour is a unit of energy equivalent to one kilowatt of power generated or consumed for one hour. It is the billing unit used by energy suppliers. kWp - kilowatt peak measures of the peak performance, noon on a sunny day in summer, of a PV solar energy system. Why did we install PV Solar?Back in July 2010 I was at our local shopping centre when I came across a kiosk where they were trying to sell photovoltaic solar electricity systems (PV Solar). I became interested and decided to investigate further. After discussing it with family and friends, a great deal of research, and getting several quotations we decided to get a system installed. The most useful source of information was the Energy Savings Trust. What system did we install?We installed a 21 panel PV system with a capacity of 3.78 kwp. The panels were by Romag, the inverter by Fronius and it cost £16,075. It was installed on an unshaded south facing roof with a 38º pitch. We were quoted that this 3.78 kWp PV solar system would generate 3405 kWh per year. This would generate income/savings as follows:
Our system was switched on on 5th August 2010. For the first year we expected income and savings amounting to: £1628. How much did we get? We also found that to make the most of our free electricity required some changes in how we used electricity, see: Using free solar electricity.
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© J. Ansell 2015 |