Solar PV - Costs, Savings & Earnings


The average domestic solar PV system is 4kWp and on average costs between £6,000 and £8,000 with smaller systems starting from as little as £3,000. (including VAT at 5%). Costs have fallen significantly over the last year. Guidance on finding an installer.Other factors that affect PV installation costs are:

October 2012, saw the launch of the Green Deal, a Government scheme which is set to revolutionise Britain's poorly insulated and ageing housing stock. Through the scheme customers are able to apply for funding to install energy efficiency home improvements including solar panels and other microgeneration technologies.

  • The more electricity the system can generate, the more it costs but the more it could save.
  • Larger systems are usually more cost-effective than smaller systems (up to 4kWp).
  • PV panels are all around the same price per kWp, but PV tiles cost much more than a typical system made up of panels.
  • Panels built into a roof are more expensive than those that sit on top.


A 4kWp system can generate around 3,700 kilowatt hours of electricity a year – roughly equivalent to a typical household's electricity needs. It will save nearly two tonnes of carbon dioxide every year.

solar cost
System size Savings per year Carbon dioxide per year
Registered on and from 1st April 2014 4kWp £750 1.8 tonnes

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