Solar panels in Watford
£3,666 to £11,534 installed, 1,448 hours of sun a year, and 1,145 installations already in the council area.
What a system costs in Watford
3kWp
£3,666–£4,903
Saves up to £373 a year. Pays back in about 11 years.
4kWp (most common)
£5,849–£7,395
Saves up to £580 a year. Pays back in about 11 years.
6kWp
£8,542–£11,534
Saves up to £853 a year. Pays back in about 12 years.
Source: Home Energy Quotes Cost Index, costs modelled June 2026, savings at the October to December 2026 price cap. Prices are estimates and include installation and VAT. Actual costs may vary.
Watford in numbers
Published statistics for the Watford council area, not our estimates.
At the end of 2025 there were 1,145 solar PV installations in the Watford council area, about 28.9 for every 1,000 households, with 5.8 MW of capacity between them. The count covers every size of installation, on homes and businesses. 42% of homes with an EPC in the Watford council area are rated D to G, and the median energy score is 71, which is band C.
| Watford council area | Figure | Source |
|---|---|---|
| Solar PV installations (all sizes) | 1,145 (28.9 per 1,000 households) | DESNZ, end of 2025 |
| Homes with an EPC rated D to G | 42% | ONS, EPCs lodged to March 2025 |
| Median EPC energy score | 71 (band C) | ONS, EPCs lodged to March 2025 |
| Households on mains gas heating only | 73.8% | Census 2021, ONS |
| Warm Homes: Local Grant, 2025 to 2028 | £3,750,031 to the consortium led by Watford | DESNZ, list updated July 2026 |
| Electricity network operator | UK Power Networks (East England) | NESO licence area boundaries |
Watford is served by UK Power Networks, the electricity network operator for East England. Solar panels have to be registered with the network operator. Your installer normally does this: smaller systems are notified after installation, and larger ones need approval before work starts.
These are published official statistics for the Watford council area, which covers Watford, not Home Energy Quotes estimates. Sources checked 6 October 2026.
Is Watford a good place for solar panels?
Watford receives an average of 1448 hours of sunshine per year — close to the UK average of 1,493 hours. Combined with East of England’s energy prices tracking the UK average, solar panels installations here may offer good value (individual results will vary).
Watford has a population of 131,325, and the area falls within the East of England region. We recommend getting at least 3 quotes to compare prices.
Find Installers in Watford
We recommend getting at least 3 quotes from qualified installers before making a decision. Check reviews, ask for local references, and make sure warranties are clearly stated in writing.
What to check before hiring an installer in Watford
- Qualifications — check the installer holds relevant qualifications and certifications for solar panels before signing any contract
- Local references — ask for completed jobs in Watford or Hertfordshire
- Reviews — check online reviews before committing
- Warranty — product and workmanship warranties should be clearly stated in writing
- 3 quotes minimum — we recommend comparing at least three quotes to ensure you get a fair price
Questions about solar panels in Watford
How much do solar panels cost in Watford?
How many solar panel installations are there in Watford?
Is there a grant for solar panels in Watford?
Solar panels in Watford qualify for 0% VAT until March 2027. In Great Britain, the Smart Export Guarantee pays for surplus electricity you export to the grid, at a rate each supplier sets.
How long is the payback period in Watford?
Do I need planning permission in Watford?
How do I find a good installer in Watford?
Get quotes for your roof in Watford
Up to three approved installers who cover Watford may contact you. Free, no obligation.
Watford on the map
Solar Panels in nearby towns
Last reviewed: . Costs are modelled estimates from the Home Energy Quotes Cost Index — see how we calculate them. Grant rates are checked against GOV.UK.