Solar Panel Scams in the UK: The 2026 Field Guide

If a stranger knocks on your door claiming your roof has been “selected” for free solar panels, or a caller says a “government grant” will cover your whole system before it “expires this week”, you are looking at the modern face of solar mis-selling. The good news is that after several boom-and-bust cycles, the UK solar industry is more consumer-protected than ever — MCS certification, a proper ombudsman route, and 0% VAT until March 2027 have made honest solar genuinely good value. The bad news is that scammers know this too, and they’ve adapted their scripts to sound exactly like the real thing. This guide sets out what to watch for in 2026, how to check a company before you sign anything, and where to go if something has already gone wrong.

Why solar scams are having a moment again

Solar has never been more mainstream. The MCS reported a record 257,397 UK installations in 2025 — up 32% on the year before — with roughly 21.6 GW of capacity now deployed, supplying around 6.4% of UK electricity. That kind of growth always drags a tail of opportunists behind it. Genuine 0% VAT on residential solar and battery storage (in place until 31 March 2027, after which it’s scheduled to revert to 5%) is a real and valuable incentive — but it’s also the perfect hook for a script that says “the grant runs out Friday, sign today.” There is no such grant. VAT relief is a tax treatment applied automatically by a VAT-registered installer at the point of sale; it doesn’t require an application, it doesn’t “run out” on a random weekday, and no legitimate company needs you to sign under time pressure to access it.

Red flag #1: the “government scheme” that doesn’t exist

This is the single most common lie in solar sales. There is no universal free-solar grant for English homeowners. The schemes that genuinely exist are narrow and means-tested:

• ECO4 and Warm Homes support low-income households in low-EPC-rated homes — not a general solar giveaway, and eligibility is tightly defined.
• Home Energy Scotland offers interest-free loans (not grants) toward solar and battery for Scottish homeowners.
• The Boiler Upgrade Scheme pays £7,500 towards an air source heat pump — it does not fund solar PV at all, despite what some doorstep callers imply.
• Farm-scale solar in England can access the Improving Farm Productivity grant (around 25% of eligible cost) — not “40%”, and not a residential scheme.

If someone tells you the government will pay for your panels outright, or quotes a scheme name you can’t find on GOV.UK, that’s your cue to end the call. For a plain-English breakdown of what’s actually available and what it’s worth in cash terms, thecostofsolar.co.uk’s guide to UK solar costs is a useful sanity check before you speak to anyone.

Red flag #2: pressure, urgency and “today-only” pricing

Legitimate solar quotes don’t expire in 24 hours. A genuine installer wants you to compare quotes, check their MCS number, and make an informed decision — because a well-informed customer is far less likely to cancel or complain later. Classic pressure tactics include:

• “This price is only valid if you sign today.”
• “We’ve got a crew free this week, but only if we book now.”
• A rep who won’t leave, or repeatedly calls back the same evening.
• Quotes with no itemised breakdown — just one lump sum for “the system.”

Under the Consumer Contracts Regulations, if you buy at home or over the phone (off-trade-premises) you have a statutory 14-day cooling-off period to cancel, in writing, no reason needed. Any installer who tells you otherwise, or who asks you to waive that right to get a “discount,” is not someone you want a 25-year relationship with. A proper quote takes time — a site survey, a shading assessment, and a design based on your actual roof, not a script read off a call centre floor.

Red flag #3: deposit theft and the “pay in full up front” trap

This is where real money is lost. The pattern is depressingly consistent: a company (sometimes newly incorporated, sometimes trading under a rebranded name after a previous entity collapsed owing customers) takes a large deposit or full payment up front, then either disappears, delays for months citing “supply issues,” or installs a botched system and vanishes before snagging.

Practical protections:

• Never pay the full amount up front. A reasonable structure is a modest deposit, a stage payment, and a final balance on satisfactory completion and commissioning.
• Pay by credit card where possible for purchases over £100 — Section 75 of the Consumer Credit Act makes the card provider jointly liable if the goods or services aren’t delivered.
• Check Companies House for how long the company has existed and whether directors have a history of dissolved companies in the same trade.
• Ask for the MCS certificate number before you pay anything, and verify it independently on the MCS website — don’t just trust a logo on a PDF quote. MCS certification is also the gateway to Smart Export Guarantee payments, so an uncertified installer isn’t just a scam risk, it locks you out of getting paid for the electricity you export.
• Get everything in writing — brand and model of panels, inverter make and warranty terms, exact kWp size, and the payment schedule — before any deposit changes hands.

Reputable regional installers are generally happy to talk through payment terms without pushback. Firms like FLD Electrical in Swansea or Hazell Electrical in West Kent work on staged payment structures precisely because it protects both sides — you’re not funding a company’s cash flow, and they’re not chasing a customer who’s had second thoughts. If a company balks at a staged arrangement, that’s informative in itself.

Red flag #4: inflated savings and fantasy payback periods

Some sales decks still promise “your panels pay for themselves in 3 years” or “you’ll never pay an electricity bill again.” Treat both claims as a warning sign. Realistic figures for 2026 look more like this:

UK yields average around 850 kWh per installed kWp per year, rising to 1,050+ kWh/kWp in the sunniest parts of the south. With import electricity at roughly 25p/kWh (Ofgem price cap, varies by tariff) and export rates typically 12–20p/kWh depending on supplier — there’s no single fixed export tariff, so be suspicious of anyone quoting one flat rate as guaranteed — genuine payback for a well-sized system usually lands somewhere in the 6–12 year range, not 3. Add a battery (typically £4,000–£8,000 installed, or around £8,500–£10,500 for a 13.5kWh Tesla Powerwall 3) and the sums shift again, usually lengthening payback slightly while improving self-consumption. If a salesperson’s numbers beat this by a wide margin, ask them to show their working — line by line, not a glossy graph. thecostofsolar.co.uk’s payback period tool is a good independent second opinion on any quote you’ve been given.

Genuinely good modern panels (N-type TOPCon, HJT or ABC cells) degrade at only around 0.4% a year and are commonly warrantied for 25–30 years; string inverters typically last 10–15 years and cost £500–£1,000 to replace when they do. Anyone promising zero maintenance and zero future costs for three decades is glossing over the one component that will need attention. If you already own a system and want it checked over rather than sold to, national specialists like Solar Maintenance Solutions exist specifically to service and audit existing installs — a useful independent check if you’re worried a system was mis-installed.

Red flag #5: fake or borrowed accreditation

Some rogue traders lift another company’s MCS number, use a stock photo of a “team,” or claim membership of a trade body they’ve never joined. Before any money changes hands:

1. Search the company name and the individual quoting you — separately.
2. Check the MCS database directly rather than trusting a badge on their website.
3. Ask for their NICEIC or equivalent electrical competency registration if the job involves consumer unit or grid-connection work.
4. Look for a fixed business address and landline, not just a mobile number and a Gmail address.
5. Ask how long they’ve been trading under this exact company name — not a “sister brand” or “new division” of something that folded last year.

Established regional installers generally have nothing to hide here. Companies such as ecoaim in Livingston, Greenlinc Renewables in Lincolnshire, or Premier Electrical Renewables will readily point you to their MCS listing and past installs because it’s their strongest sales tool, not something to obscure.

What to do if you think you’ve been scammed

• Stop payment immediately if a card or bank transfer is still processing — contact your bank’s fraud team.
• Report it to Action Fraud (actionfraud.police.uk) — this is the UK’s national reporting centre for fraud and cybercrime, and creates the paper trail other agencies act on.
• Use the MCS Certified Consumer Protection route if the installer was MCS-certified — this can escalate to warranty and workmanship issues even if the company has since gone bust, depending on the insurance-backed guarantee in place at the time.
• Complain to your local Trading Standards via the Citizens Advice consumer helpline, especially for doorstep or cold-call sales, which fall under stricter cancellation-right rules.
• If you paid partly by credit card, raise a Section 75 claim with your card issuer regardless of what the installer says — this is a statutory right, not a favour.
• Check for an ombudsman route — many reputable installers are members of a redress scheme as a condition of trade body membership; ask which one covers your contract before you sign, not after there’s a dispute.

The honest version of solar is still a good deal

None of this should put you off solar itself — the underlying economics, backed by 0% VAT until March 2027 and genuinely durable modern hardware, are sound when done properly. The defence against scams isn’t scepticism about solar as a technology, it’s ordinary consumer diligence: no all-cash-up-front, no invented grants, no 24-hour deadlines, and an MCS number you’ve checked yourself. If you want a broader primer on how panels perform in UK conditions before you even start getting quotes, The British Solar Blog’s guide to whether solar actually works here and our notes on choosing panels are good starting points. And if in doubt about a specific installer’s claims, a second quote from an established regional firm — whether that’s Solent Solar in Hampshire or Energy Concerns in Leicester — costs nothing and will quickly tell you whether the first one was fair.

Take your time, get it in writing, pay in stages, and check the accreditation yourself. That’s the whole defence, and it works.