Solar · Battery · EV — Berkshire

Solar Panels Windsor

Solar panels, battery storage and EV chargers for homes in and around Windsor — designed from your actual usage, installed by an MCS-certified team, and explained in plain English before you commit to anything.

Quick answer

Solar panels in Windsor:

  • Cost: the Energy Saving Trust puts a typical 4.5 kWp home system (around 12 panels) at around £7,600 installed. Your own figure comes from a survey of your roof, not a table.
  • Generation: we model your own roof's pitch, orientation and shading at the survey rather than quote a generic Windsor yield.
  • Payback: on the Energy Saving Trust's table, with export payments and fuel prices as of July 2026, a London home pays back in about 9 years.
  • VAT: residential solar installations carry 0% VAT until 31 March 2027, then 5% from 1 April 2027.
  • Battery: the Energy Saving Trust puts a 5 kWh battery at around £4,600; fitting it with the panels costs less than a separate visit later.
  • Who fits it: HCE is a NAPIT member (73495), MCS-certified for solar PV via NAPIT, and a HIES Consumer Code member. Check both registers yourself.

Figures: Energy Saving Trust (solar, updated 27 August 2026; batteries, updated 19 August 2026) · HMRC VAT Notice 708/6. Each is cited in full further down this page.

How solar panels get fitted in Windsor

Four steps from first call to switch-on. No pressure at any stage, and a straight answer if it would not pay its way.

  1. Step 1

    A survey of your roof

  2. Step 2

    Design and a written quote

  3. Step 3

    Installation and grid paperwork

  4. Step 4

    Handover

Solar on Windsor's housing

What Royal Borough of Windsor and Maidenhead is doing

What solar costs on a Windsor home

When we'd tell you not to fit solar in Windsor

Solar through the year, local uptake and the grid in Windsor

Local facts, sourced

Windsor in numbers

Every figure below comes from a named public source — the same standard we hold our savings estimates to.

  • Windsor Castle got solar panels for the first time in its history in 2024 — installed on the roof of the Lord Chamberlain's Upper Store in place of its old lead roof, as reported alongside the 2023-24 Sovereign Grant accounts (July 2024), with plans to add more panels in future.

    Source: Reuters, reporting the Sovereign Grant annual report, July 2024 (via Yahoo News UK / The Globe and Mail)

  • Over 1,000 solar panels were installed across the Windsor Great Park estate in 2023/24, expected to generate 300,000 kWh of renewable energy every year and save 60 tonnes of CO2 — equivalent to the carbon dioxide absorbed by 2,500 trees growing for one year.

    Source: Windsor Great Park — Sustainability (The Crown Estate)

  • The Royal Borough of Windsor and Maidenhead backs residential solar through the Solar Together group-buying scheme (run with iChoosr), where pre-vetted installers bid in a reverse auction for residents' solar, battery-storage and EV-charger installations; the 2025 round's registration ran until Friday 29 August 2025.

    Source: Royal Borough of Windsor and Maidenhead — Solar Together

  • The SL4 (Windsor) postcode district has 13,517 EPC-certificated homes with an average rating of band D — only 44% reach band C or above — and solar photovoltaic panels are the single most-recommended improvement on local certificates, appearing 11,356 times.

    Source: EPC Advisor — SL4, Windsor and Maidenhead (government EPC register data)

  • The Royal Borough has 27 designated conservation areas, several covering Windsor itself — Windsor Town Centre (with sub-areas including Castle and Royal Mews, Historic Core and High Street, and Riverside), Inner Windsor, Trinity Place/Clarence Crescent, Mill Lane (Clewer Village) and Old Windsor — so many Windsor roofs sit inside protected townscape.

    Source: Royal Borough of Windsor and Maidenhead — Conservation areas

  • An Article 4 Direction covers Windsor Town Centre requiring planning approval even for the exterior painting of buildings, to preserve and enhance the historic town centre's appearance — a signal that roof-mounted work in central Windsor needs careful planning checks first.

    Source: Royal Borough of Windsor and Maidenhead — Permitted development rights

  • RBWM declared an environment and climate emergency in June 2019 and targets net-zero carbon emissions across the borough by 2050 at the latest; its Environment and Climate Strategy (approved 17 December 2020) makes energy — reducing consumption and decarbonising supply — one of its four core themes, and all the electricity the council uses now comes from renewable sources, including solar panels on the Town Hall.

    Source: RBWM — Environment and Climate Strategy; RBWM — Energy and sustainability

  • Grid connections and export approvals for Windsor homes go through SSEN (Scottish and Southern Electricity Networks), whose central southern England distribution area covers Berkshire; SSEN serves over 3.9 million homes and businesses across its two networks, with engineering and customer-service teams at major offices including nearby Reading.

    Source: SSEN — Who we are

  • Windsor and Maidenhead's Borough Local Plan (adopted 8 February 2022) provides for 712 new homes a year — 14,240 across the 2013-2033 plan period — meaning a steady pipeline of modern, better-insulated new-builds alongside Windsor's historic stock.

    Source: RBWM — Adopted local plan

Data last reviewed: July 2026

Where we work around Windsor

Windsor solar questions

Do I need planning permission for solar panels in Windsor's conservation areas?
Is there a council-backed solar scheme in Windsor?
Windsor Castle has solar panels now — what does that mean for my home?
Would solar panels improve my Windsor home's EPC rating?
Who approves a solar grid connection for a Windsor home?

Also for Windsor homes

Solar is usually the first step, not the last. If you are charging a car at home, we can talk you through a home EV charge point; if you are comparing battery brands, we can talk you through Sigenergy storage systems; if you are set on a particular battery, we can talk you through Tesla Powerwall; and if you are wondering whether a battery would pay its way, we can talk you through home battery storage. Every one of them starts the same way — a free survey of your actual roof, usage and property, and a straight answer about whether it is worth doing.

Get a straight answer for your Windsor home

Get your free, no-obligation quote

No pressure, just clear advice.

See our customer reviews