Solar Panel Installer Warrington (an independent guide) › Guides
Our data and how we use it
Every figure on this site comes from a source you can check yourself. Here is each one, what we used it for, and the parts that are our own working.
Sources and what each gave us
| Source | Used for | Edition |
|---|---|---|
| DESNZ: solar PV cost data, 2025/26 | North West average cost per kW used in the quote checker and prices pages | Solar PV cost data 2025/26, Regional sheet (means), published 28 May 2026 |
| PVGIS 5.3, European Commission Joint Research Centre | Output for every roof direction and pitch, month by month, and for eight places in the borough | PVGIS 5.3, pulled 3 November 2026 |
| DESNZ: renewable electricity by local authority, 2014 to 2025 | 5,661 solar installations and 29.74 MW in Warrington at the end of 2025 | Published 29 September 2026 (2025 provisional) |
| Census 2021 TS044: accommodation type (Nomis) | House types: 40.3% semi-detached, 24.6% detached, 12.2% flats | Census 2021 |
| Census 2021 TS054: tenure (Nomis) | Tenure: 68.7% of households own their home | Census 2021 |
| VOA: Council Tax stock of properties 2026 | Build periods: 29.1% of homes built 1965–1992; 12.6% before 1919; 10.3% bungalows | Council Tax stock of properties at 31 March 2026 |
| ONS: energy efficiency of housing in England and Wales | 56.85% of Warrington homes with an EPC rated A to C | EPCs lodged April 2015 to March 2025 |
| The National Archives: Warrington Development Corporation records | New Town designation (26 April 1968) and the Development Corporation's history | The National Archives catalogue |
| Warrington Borough Council: heritage and built environment evidence (16 conservation areas) | The 16 conservation areas | Warrington Borough Council |
| Warrington Borough Council: Thelwall Village conservation area leaflet | Thelwall Village Article 4 direction (1985) | Council leaflet, December 2000 |
| Planning data platform (MHCLG): conservation areas, listed buildings, scheduled monuments | Listed building entries (392) and scheduled monuments (13) in the borough | Read 3 November 2026 |
| Warrington Borough Council: Warm Homes: Local Grant | Warm Homes: Local Grant eligibility, measures and how to apply | Read 3 November 2026 |
| Warrington Borough Council: Switch Together scheme returns (3 Aug 2026) | Switch Together: 190 Warrington households; 2026 round dates | Council news, 3 August 2026 |
| Warrington Climate Emergency Strategy (July 2022) | Two network operators; borough net zero by 2041 | Warrington Climate Emergency Strategy, July 2022 |
| NESO: GB distribution network operator licence areas | Licence-area boundaries used for our network operator overlay | NESO GB DNO licence areas |
| Ofgem: energy price cap unit rates and standing charges | Unit rate in our first-year sums: 26.32p per kWh | Price cap 1 October to 31 December 2026 |
| Ofgem: typical domestic consumption values decision (May 2026) | Typical household use: 2,500 kWh a year | In use from July 2026 |
| HMRC VAT Notice 708/6: the zero rate on installed solar panels and batteries | 0% VAT on installed solar and batteries until 31 March 2027 | HMRC VAT Notice 708/6 |
| Met Office: Woodford climate averages 1991–2020 | Nearest sunshine record: about 1,385 hours a year | Met Office 1991–2020 averages |
Our own working
- The quote checker divides your price by your system size, compares it with the DESNZ North West mean for that size band, and multiplies the PVGIS figure for your roof by your system size. It does nothing else, and nothing you type leaves your browser.
- The network operator areas come from laying the national licence-area boundaries over the borough's wards. They are our estimate, not an official list.
- First-year values multiply PVGIS output by stated shares used at home and stated tariffs. We leave out any case where panels alone would cover more than 75% of a household's year, or more than 90% with a battery.
What we do not do
- We do not publish payback periods or promises about what panels will save you.
- We do not rank, review or recommend installers.
- We do not guess local facts. Where we could not confirm something, such as whether the 1985 Thelwall direction is still in force in its original form, we say so.
When figures change
The price cap changes every three months, with the January to March 2027 figure due in late November 2026; the VAT relief ends on 31 March 2027; DESNZ updates its cost and installation figures once a year; council pages change without notice. Each page shows when it was checked. Tell us through the form if you find something out of date.
Licences
Government statistics are used under the Open Government Licence. PVGIS data is provided by the European Commission's Joint Research Centre. Council information is summarised, not copied.
Got a solar quote you are not sure about?
Send us the figures, or the question on your mind, with your Warrington postcode. The message comes to SEO-DONS LTD, the company behind this independent guide, and we answer by email. There is no charge and no obligation of any kind.
What happens next
- Fill in the form; a full postcode tells us which part of the borough you are in.
- We look at what you sent and answer by email, with the figures and sources that apply.
- What you do next, and which firm you choose, is entirely up to you.