Free mapPVGIS 5.3 (PVGIS-SARAH3)21 squares of about 5 km

Solar panel map of Colchester

A typical 4 kWp solar panel system, about ten panels, on a south-facing roof in Colchester would make about 4,350 kWh of electricity a year, against 4,080 kWh across England. Across its homes' postcodes it ranges from about 4,310 kWh to 4,380 kWh.

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Yearly output of a 4 kWp south-facing system
2,600 kWh4,800 kWh

Each square is about 5 km across and holds at least one home in Colchester, so a square on the boundary also appears on the next council's map. It is coloured by the yearly output of a 4 kWp system on a south-facing roof.

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Solar output in Colchester

  • 4,350 kWha year, typical for a 4 kWp south-facing system
  • 4,310 kWh to 4,380 kWhfrom the lower to the upper tenth of its homes' postcodes
  • 4,080 kWhtypical across England
  • 4,010 kWhtypical across the UK

Colchester ranks 30 of 361 UK councils for typical solar output (1 is the highest). See every council

How to read this map

  • It is an estimate for the area, not a quote. It doesn't allow for shading from hills, trees or nearby buildings, or for a roof's real size, pitch and direction.
  • The figure is for a 4 kWp system, about ten panels, on a 35° south-facing roof with 14% system losses, from satellite sunshine data.
  • Typical is the middle figure across the postcodes of every home in Colchester. A home in a sunnier or duller square can sit above or below it.
  • It is not a savings figure: that depends on how much of the electricity the home uses and its tariff.

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More council solar maps

Sources

Solar yield from the Photovoltaic Geographical Information System (PVGIS), European Commission Joint Research Centre. PVGIS information is free to use, with this acknowledgement of the source. Source: Office for National Statistics licensed under the Open Government Licence v3.0. Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026.