Domestic Solar PV Installations
Commercial and Farm Solar PV Installations
Multi Roof Installations
Making the most of your solar PV system
According to latest figures available from energy regulator Ofgem the average UK household uses 3,300 kWh of electricity each year. You will be able to meet some of this requirement in daylight hours with the electricity generated by your solar PV system. The more you can use electricity in the daytime, when the system is generating, the more you can save on the electricity you need to buy from your electricity company.
Even if you are not at home during most of the day, you could put your appliances (such as washing machines and dishwashers) on timers to run during daylight hours.
The average washing machine runs through hundreds of cycles a year and even an energy-efficient one uses at least 1 kWh per cycle (source:
Energy Saving Trust). So you could save 100s of kWh off your bill by doing your washing in daylight hours.
If you have a dishwasher, currently that's likely to be costing you on average between £40 and £47 a year to run depending on how energy efficient it is (source: Energy Saving Trust 2013). So running that in the day whenever possible will also save you money off your bill.
Power Your Immersion Heater from your Solar Panels
A typical 4kW domestic system will export around 50% of it's production back on to the grid, this will be used by your neighbours. Although you still get paid for everything you produce, it makes sense to use as much of the free energy as possible.
This is where an immersion heater control comes in. The unit constantly monitors the incoming supply cable and diverts any surplus generated energy to the immersion heater. In our experience customers with these units installed are able to heat their water from March until September without using the gas/oil fired boiler.
A standard hot water tank needs around 7kWh to heat the water to 65ºC, this would take 3.5 hours if 2kW of surplus energy is available.
The unit can be fitted at the time of installation or added to a building with a PV system already in place.
There are several different devices on the market. We can advise on the model that best suits your needs and budget.