Best Solar Panel Installers UK 2026: Our Top Picks

The installer you choose matters as much as the panels they fit. Solar PV is one of the largest single purchases most homeowners make, and an unvetted or insolvent company can leave you without warranties, SEG export rights, or any recourse. Getting MCS certification and consumer-code membership confirmed before you sign is the single most important step. Beyond that, installer quality, pricing and coverage vary considerably. Here are the companies that stand out in 2026.

Our top picks at a glance

Every pick below holds active MCS certification unless noted. For a full explanation of what to look for when evaluating any installer — questions to ask, red flags, and contract rights — see our solar installer checklist.

Sunsave — best for no-upfront cost and comprehensive accreditations

Who it's for: Homeowners who want zero upfront spend without the complications of a rent-a-roof lease or PPA. With Sunsave you own the system from day one.

Sunsave operates a solar subscription: from £69 per month fixed for 20 years (8.6% APR). Because you own the panels, you receive the SEG export payments and all the performance data throughout the term. That is materially different from a lease where the installer keeps the export revenue. If you want to explore how subscriptions compare to 0% finance deals, our interest-free solar guide covers the main options side by side.

Sunsave holds the most comprehensive accreditation stack of any installer we reviewed: MCS, RECC, TrustMark, NAPIT, EPVS Gold, and FCA authorisation. It is a confirmed Which? Trusted Trader — winning Which? Trusted Trader of the Month in November 2025 — and is backed by Aviva for damage and workmanship cover. Coverage is England, Wales, and southern Scotland.

Watch out for: Monthly payments over 20 years can exceed the all-in cash purchase price depending on interest rate environment; model the total cost before signing.

Heatable — best for transparent fixed pricing

Who it's for: Buyers who prefer to know the cost upfront without sitting through a survey-and-sales visit.

Heatable publishes fixed prices online — a seven-panel system with microinverters from £5,300; panels and battery combined from £7,400. It holds MCS certification, Which? Trusted Trader status, and HIES consumer-code membership, and backs every installation with a 24-month insurance-backed workmanship guarantee. Trustpilot shows 4.8/5 across more than 7,400 reviews — a high score supported by meaningful review volume, not just a handful of recent responses.

Watch out for: Fixed-price online systems work well for straightforward installs. Complex roof geometries, irregular pitches, significant shading, or listed building restrictions may require a bespoke survey and quote.

Octopus Energy Solar — best for existing Octopus customers

Who it's for: Households already with Octopus Energy who want to combine installation with the Outgoing Octopus export tariff (currently 12p/kWh).

Octopus Energy Solar is a subsidiary of Octopus Energy Group and uses a mix of in-house engineers and third-party "Octopus Trusted Partners." Entry pricing starts at £6,163 for a two-panel setup; a more typical eight-panel system with a 5kWh battery runs £8,123–£9,691 (October 2025 prices). Panels are JA Solar with a 25-year product warranty.

One important nuance: the MCS certification picture for Trusted Partners installations has been subject to change. Before signing, confirm explicitly with Octopus whether your installation will produce an MCS certificate — you need one for mortgage lender compliance and most home insurance policies. Our MCS certificate guide explains exactly what to expect and why the certificate matters.

Watch out for: Octopus Flux — the smart time-of-use tariff for solar-plus-battery households — has been paused to new customers since March 2026 with no reopening date announced. Do not factor it into your payback calculation unless it has reopened by the time you read this.

Project Solar UK — best volume track record

Who it's for: Buyers who want a large, established national company with a long installation history.

Founded in 2011 and headquartered in Burton upon Trent, Project Solar UK has completed more than 45,000 residential installations across England, Scotland, and Wales. It holds MCS and RECC consumer-code membership and scores 4.6–4.7/5 on Trustpilot. Pricing is not published publicly; a physical survey is required before any quote is issued — which is the correct approach for a bespoke roof installation.

Wickes Solar — best established brand with group backing

Who it's for: Buyers in mainland Britain who want a company with a verifiable retail presence and FTSE-listed corporate backing.

Solar Fast, founded in 2006 and one of the longest-established solar-specific installers in the UK, was acquired by Wickes Group plc in 2024 and now trades as Wickes Solar (wickes.co.uk/wickes-solar). It holds MCS and HIES consumer-code membership. The Wickes group backing reduces the insolvency risk that has affected several smaller solar companies in recent years. Trustpilot scores have shifted post-rebrand — check the current rating at uk.trustpilot.com before placing weight on any figure you see quoted elsewhere.

Solar Together — best council group-buying scheme

Who it's for: Homeowners in participating council areas who want to reduce installation cost through collective purchasing power, without doing the installer comparison themselves.

Solar Together is a procurement scheme run by Dutch firm iChoosr on behalf of UK local authorities including the Greater London Authority, Wiltshire, and Surrey. Pre-vetted MCS and RECC or HIES-accredited installers submit sealed competitive bids; the lowest price wins and applies to every participant in that council area. Pre-vetted MCS and RECC or HIES-accredited installers compete on price, with the winning bid applied to all participants — participants typically pay less than individual open-market quotes. There is no obligation to proceed after registering. Check solartogether.co.uk for live rounds in your council area.

What you should expect to pay

The Energy Saving Trust puts the average UK solar installation for a typical home at around £6,100 for a 3.5kWp system; larger 4–6kWp systems commonly run £7,000–£10,000 depending on panel brand, inverter type, and roof complexity. All residential solar installations currently attract 0% VAT — a temporary relief scheduled to revert to 5% on 1 April 2027 under current legislation, so the timing of your purchase has a real cost implication for larger installs.

Prices vary by system size, roof type, location, and panel and inverter brands. For a breakdown by system size — from 3kW to 10kW — with payback calculations, see our solar panel costs guide. For what separates a legitimate quote from a misleading one — including red flags like unrealistic payback claims and above-cap deposit requests — see our solar panel scams guide.

How to find a vetted local installer

For regional and independent installers not listed here, the MCS installer search at mcscertified.com/find-an-installer is the authoritative directory. Filter by postcode and technology (Solar PV) to see active-certified companies near you. Always verify an installer's certification status live on the site — not from a certificate they hand you, which may have expired or be counterfeit. MCS has formally issued warnings about fraudsters using fake MCS credentials.

For consumer-code membership, check recc.org.uk or hiesscheme.org.uk. Since 20 January 2026, new complaints about RECC members are handled by Green Homes Dispute Resolution (ghdr.org.uk) — free for consumers, binding on the installer. HIES runs its own mediation and ombudsman process. Either code provides meaningful protection; RECC's staged-payment coverage (up to 60% of contract value) is broader than HIES's £5,000 absolute cap for larger installs.