A south-facing roof in Essex generates about 1,061 kWh per kWp a year on the EU's PVGIS model, among the highest in the UK, and every unit you use saves 26.61p at the Eastern England price cap rate. A typical 4.5kWp system would make about 4,774 kWh a year.
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A south-facing 1kWp system at 35 degrees in Chelmsford generates about 1,061 kWh a year, according to the EU's PVGIS model. That ranks 2 of the 20 areas we cover, which run from 850 kWh in Glasgow to 1,119 kWh in Dorset. East and west roofs still work, at roughly a fifth less.
| Roof direction (35° pitch) | Per kWp a year | June | December |
|---|---|---|---|
| South-facing | 1,061 kWh | 127 kWh | 38 kWh |
| East-facing | 840 kWh | 121 kWh | 15 kWh |
| West-facing | 824 kWh | 120 kWh | 16 kWh |
PVGIS is a modelled figure for an unshaded roof with 14% system losses, and it runs higher than the MCS method installers must use for your written estimate, which gives roughly 800 to 950 kWh per kWp for a well-oriented UK roof. Use PVGIS to compare places and the installer's MCS estimate to plan your budget. Our guides to which direction panels should face and how much electricity solar panels produce go further.
What that electricity is worth in Essex
Every unit you use yourself saves 26.61p, the Ofgem price cap rate for direct debit customers in the Eastern England region from 1 October to 31 December 2026. The Great Britain average is 26.32p. Every unit you export earns whatever your Smart Export Guarantee tariff pays, which the Energy Saving Trust puts at around 12p typically.
Take the Energy Saving Trust's typical 4.5kWp home system. On the PVGIS figure for Essex it would generate about 4,774 kWh a year. If you used all of it, that would be worth about £1,270. If you exported all of it, about £573. Real homes sit between the two, and a battery or daytime use pushes you towards the higher figure. The Energy Saving Trust prices that typical system at around £7,600. See our solar panel cost guide and current export rates.
Where Essex installs solar
Essex is already above the UK average for rooftop solar, and the north and east of the county lead. At the end of 2025 the 12 districts under Essex County Council had 44,748 solar installations, about 71 per 1,000 households by our count from the government's local authority table, against about 69 across the UK. Adding Southend-on-Sea and Thurrock takes the county to 51,385.
Colchester has the most installations of any Essex district (8,610), followed by Tendring (5,784) and Chelmsford (5,254). Maldon has the highest density, at about 111 installations per 1,000 households. Across the wider East of England, government figures show 18,109 new installations in 2026 up to July, taking the region to 241,195.
Warm Homes grant in Essex: HEAT Essex
Essex's Warm Homes: Local Grant is delivered through HEAT Essex, and solar panels and battery storage are both funded measures. HEAT Essex is run by Happy Energy Solutions with Essex County Council and covers the Essex districts plus Southend-on-Sea and Thurrock. Basildon runs its own scheme. When we checked on 10 October 2026, HEAT Essex said it was temporarily oversubscribed.
Chelmsford City Council's page sets out typical eligibility: an EPC rating of D to G and a household income under £36,000, certain benefits, or a qualifying postcode. In Jaywick Sands and the surrounding area, the Jaywick and District Energy Hub, run by Essex County Council with Tendring District Council and Citizens Advice Tendring, helps residents apply. Our guide to solar panel grants in the UK covers the national picture.
Planning and your network operator in Essex
Rooftop solar on an Essex house is usually permitted development, with the normal exceptions for listed buildings and conservation areas. The Dedham Vale National Landscape on the Essex and Suffolk border, which includes Dedham village, does not remove permitted development rights for rooftop panels, but it is worth raising with your installer and your district planning team. Our guide to permitted development for solar panels has the national rules.
Essex sits on UK Power Networks' East of England network. Your installer notifies UK Power Networks within 28 days, and systems exporting under 5kW are approved automatically. See our G98 and G99 guide. Neighbouring areas are covered in our guides to solar panels in London and solar panels in Kent.
Getting solar quotes in Essex
Get at least three written quotes from MCS-certified installers, each with a performance estimate for your roof and a full breakdown of what is supplied. That is the Renewable Energy Consumer Code's advice. Never pay more than 25% up front, and walk away from anyone offering a discount to sign on the day. Our guide to choosing a solar installer covers what to check.
Tell us about your home once and get quotes from MCS-certified installers covering Essex.
Get a Solar Quote →Solar panels in Essex: frequently asked questions
Are solar panels worth it in Essex?
For a house with a reasonable south, east or west-facing roof, usually yes. Essex generates about 1,061 kWh per kWp a year on the PVGIS model, among the highest in the UK, and every unit you use saves 26.61p at the Eastern England price cap rate for October to December 2026.
Is there a solar panel grant in Essex?
The Warm Homes: Local Grant, delivered through HEAT Essex, funds solar panels and battery storage for eligible households, typically with an EPC rating of D to G and a household income under £36,000. HEAT Essex said it was temporarily oversubscribed on 10 October 2026. Basildon runs its own scheme.
Which part of Essex has the most solar panels?
Colchester has the most installations of any Essex district (8,610 at the end of 2025), and Maldon has the highest share of homes with solar, at about 111 per 1,000 households, by our count from the government's local authority data.
Who is the network operator for solar in Essex?
UK Power Networks runs the electricity network in Essex. Your installer notifies it within 28 days of installation, and systems exporting under 5kW are approved automatically.
Sources for this page
Local sources checked on 10 October 2026. Solar yields: PVGIS 5.2, EU Joint Research Centre, modelled 10 October 2026. Electricity prices: Ofgem price cap by region. System cost and export rate: Energy Saving Trust. Local sources:
- DESNZ: Renewable electricity by local authority, 2014 to 2025
- DESNZ: first regional solar breakdown, 27 August 2026
- HEAT Essex
- Chelmsford City Council: Warm Homes Local Grant
- Essex County Council: cut your energy costs
- Dedham Vale National Landscape
- UK Power Networks: solar and storage, cost, time and what's involved