Solar Electricity (PV)

Costs: £4,500-£5,500 I Annual Savings: £560 I Payback: 10 years I Profit: £5000

You can generate cheap, green electricity from sunlight, even here in Britain.

Solar electricity systems capture the sun's energy using photovoltaic (PV) cells. The cells convert sunlight into electricity, and this electricity can power your lighting and appliances. You can receive payments for the electricity you generate, as well as for exporting any electricity you don’t use to the grid.

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The basics

The cells used in solar panels are now so efficient that they will work well anywhere in Britain particularly if you have a southerly orientated roof. A typical home PV system can produce around 50% of the electricity used in an average household per year (Department of Energy and Climate Change), saving around £140 on your electricity bills.

In 2010, the government introduced the Feed-in-Tariff scheme to encourage uptake of solar panels. Under this scheme, your energy supplier pays you for any energy that you generate using your solar panels, as well as any excess that you export to the grid. The average installation can make around £420 a year in FITs at current tariff rates. You can alternatively get the installation paid for using a loan from the Green Deal finance scheme.

Fitting panels is not a complex process, and you can get them fitted with very little disruption. You do need to ensure that you get a qualified installer to qualify for the FITs.

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FAQs

How much can you be paid for electricity you produce using a solar PV system?
The Feed in Tariff scheme currently pays up to 15.44p/kWh for all the electricity your system generates even if used in your property. You will also be paid 4.5p/kWh for each unit of electricity you produce and don't use as it can be exported back to the Grid. See our Feed in Tariff tables for further details.
Are solar PV systems a lot cheaper now?
The cost of the PV cells and associated equipment is driven by international supply and demand. Prices of these components have fallen substantially over the past few years as larger manufacturing facilities have been set up in response to strong demand particularly in Germany and Japan. Installation prices have in turn fallen as a result of the reduction in system prices and as the industry has grown. This drop in prices is set to continue.
What guarantees do solar PV panels come with?
It does vary from manufacturer to manufacturer but typically Solar PV panels will come with an output guarantee in the region of 20 and 25 years. The Inverter will have a shorter life, and your should budget to have this replaced once during the life of your system (25 years or more) and therefore has a shorter guarantee, typically around 5 years. The labour guarantee will depend on your installer and your should ask or study the fine print in your quote; 5 years is fairly typical.
Can I heat water with solar PV panels?
Whilst PV panels do not directly heat water (this is what solar thermal panels do) they do produce electricity that can be used to do anything that you want to - even export it back to the grid for an extra payment. This electricity can be used to heat water if you have an immersion water heater.
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