Solar Panel Installer Southport · an independent guide · About

Where our figures come from

Every number on this site either comes from a named public source or is our own working from one. This page lists the sources and explains the working, so you can check or redo any figure.

Figures checked at source on 3 November 2026. Written by SEO Dons, who neither sell nor fit solar panels.

Our own working

Output figures

Output comes from PVGIS 5.3, the European Commission Joint Research Centre's solar model, queried on 3 November 2026 for central Southport (53.6466° N, 3.0063° W) and eight other points in the town. Settings: 1 kW of crystalline silicon panels, 14% system losses, free-standing mounting, the model's terrain horizon and its SARAH3 satellite record for 2005 to 2023. We pulled eight directions at five pitches, with monthly figures for each. Values between pulled pitches are interpolated in a straight line.

The roof planner's layouts

The planner fills a roof face row by row from the gutter with panels 1.722 m by 1.134 m unless you change them, 20 mm apart, inside a clear margin you choose, which starts at the 400 mm that MCS's installation standard (MIS 3002, version 6.0, clause 5.9.7) asks for at every edge of a home's roof. On a hipped face each row's width is taken at its top edge, and the margin from a sloping hip is measured square to the hip. It tries portrait and landscape and keeps the layout that fits more. The same code produces every example roof quoted elsewhere on the site.

Costs and first-year sums

Example costs multiply a system's size by the DESNZ 2025/26 North West mean (or UK median) cost per kW for its size band. First-year values multiply PVGIS output by a stated share used at home, valued at the Ofgem price-cap unit rate for October to December 2026, plus the rest exported at a stated rate. No payback periods are given, because they depend on prices years ahead.

Every source cited

  1. Census 2021 TS044: accommodation type (Nomis)
  2. Census 2021 TS054: tenure (Nomis)
  3. Citizens Advice: cancelling a service you have arranged
  4. DESNZ: renewable electricity by local authority, 2014 to 2025
  5. DESNZ: small-scale solar PV costs by region, 2025/26
  6. DESNZ: solar photovoltaics deployment, sub-regional statistics
  7. DESNZ: Warm Homes: Local Grant policy guidance (updated June 2026)
  8. European Commission JRC: PVGIS 5.3 solar output model
  9. GOV.UK (Natural England and Defra): wild birds, protection and licences
  10. GOV.UK: apply for the Warm Homes: Local Grant
  11. GOV.UK: extending the ECO4 end date, government response
  12. GOV.UK: Warm Homes Loan Scheme
  13. GOV.UK: Warm Homes Loan Scheme factsheet (27 October 2026)
  14. GOV.UK: Warm Homes: Local Grant successful local authorities
  15. GPDO 2015, Schedule 2, Part 14 (solar permitted development)
  16. Growth Platform: Solar Together returns to the Liverpool City Region (1 November 2023)
  17. HIES consumer code
  18. Historic England: National Heritage List for England open data (listed buildings)
  19. Historic England: search the National Heritage List for England
  20. HM Land Registry: UK House Price Index, Sefton, August 2026
  21. HMRC (formerly VOA): Council Tax stock of properties 2026
  22. HMRC Notice 708/6: zero-rated VAT on installed solar and batteries
  23. MCS standards and tools library (MIS 3002, MCS 012)
  24. MCS: find a certified installer
  25. MCS: MIS 3002 solar PV systems installation standard, version 6.0 (March 2026)
  26. Met Office: Blackpool, Squires Gate climate averages 1991–2020
  27. NESO: GB distribution network operator licence areas
  28. Ofgem: decision on typical household energy use (May 2026)
  29. Ofgem: price cap rates by region
  30. Ofgem: the Smart Export Guarantee explained
  31. ONS Census 2021: Southport constituency (2010 boundary) and Sefton, accommodation, tenure and age
  32. ONS: energy efficiency of housing in England and Wales
  33. Planning data platform (MHCLG): conservation areas and listed buildings
  34. Renewable Energy Consumer Code (RECC)
  35. Sefton Council: Article 4 direction for houses in multiple occupation
  36. Sefton Council: Birkdale Park conservation area appraisal
  37. Sefton Council: climate emergency
  38. Sefton Council: climate emergency annual report 2024-25
  39. Sefton Council: community climate projects and schemes (SCRAP)
  40. Sefton Council: conservation and heritage
  41. Sefton Council: conservation and heritage FAQs
  42. Sefton Council: conservation areas
  43. Sefton Council: Hesketh Park in Southport
  44. Sefton Council: Hesketh Road conservation area advisory leaflet (2021)
  45. Sefton Council: Lord Street conservation area advisory leaflet (2018)
  46. Sefton Council: planning constraints (Article 4 directions)
  47. Sefton Council: Promenade conservation area leaflet (2021)
  48. Sefton Council: Warm Homes: Local Grant (retrofit)
  49. SI 2026/848: plug-in solar devices
  50. SI 2026/896: changes to solar permitted development from 27 August 2026
  51. SP Energy Networks to Ofgem (October 2020): SP Manweb serves Merseyside and North Wales
  52. SP Energy Networks: connecting to the grid
  53. TrustMark
  54. Victoria County History of Lancashire, vol. 3: North Meols (British History Online)
  55. Which?: buying advice for solar panels (August 2026)
  56. Wildlife and Countryside Act 1981, section 1 (protection of wild birds, their nests and eggs)

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