A very large percentage of the lifetime costs of rooftop solar go into its installation, as rooftop solar power systems have low operations and maintenance costs and zero fuel costs. As a result, there is a significant interest in the UK and elsewhere to know the latest costs of installation of rooftop solar power systems.

Rooftop solar power plant installations comprise the following components:

  • Solar panels
  • Inverters
  • Mounting structures
  • Balance of systems (cables, junction boxes etc.)
  • Installation costs

Note: We have considered rooftop solar power plants without batteries.

Based on analyses of the various sources, as of 2015, the overall cost for a rooftop solar system without subsidies in the UK is estimated to be the following:

1.5-2 pounds/W for residential (up to 10 kW) and 1-1.4 pounds per/W for industrial and commercial (25 kW and higher)

Sources & References for Installation Cost of Rooftop Solar for UK

In a finding, according to the Department of Energy and Climate Change, the cost per KW of installation for different system size bands between January 2015 and March 2015 is given below:

Size Band (KW) Average Cost of installation (£/KW)
0-4 1987
4-10 1558
10-50 1374

Please refer this link for Excel sheet: https://www.gov.uk/government/statistics/solar-pv-cost-data

Solar PV Capital Cost Estimates, £000 per MW, 2014 prices

Cost of Solar in UK

Source: Solartrade.org

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