Project Solar UK Review: Prices, Trustpilot Scores & Alternatives
Project Solar UK describes itself as the UK's largest residential solar installer, with over 50,000 installations completed since the company was incorporated in 2011. The review picture is genuinely split: around 80% of its Trustpilot reviewers give five stars, praising tidy one-day installs and clear communication, while roughly one in ten gives one star, and the recurring themes there are aftercare response times and the sales process.
The two things to understand before you book a survey: the “lifetime” guarantee is a 99-year warranty on the panels themselves, not on workmanship or batteries (both 10 years), and prices are bespoke rather than published, so the only way to know if your quote is fair is to compare it against independent local quotes for the same kit.
Quick Answer
Project Solar UK is a legitimate, MCS-certified national installer with a 4.5-star Trustpilot rating from over 6,700 reviews. Customers consistently praise installation quality; criticism centres on sales tactics (same-day discount offers) and aftercare. Their 99-year panel warranty is real but covers the panel product only; workmanship and batteries carry 10-year cover. Quotes are bespoke and forum reports suggest they often come in above the independent market, so always compare against 2-3 local MCS installer quotes before signing.
Last updated June 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
Who are Project Solar UK?
Project Solar UK Limited (Companies House number 07673744) was incorporated on 17 June 2011 and is headquartered at Lakes Court, Lancaster Park, Burton-on-Trent, Staffordshire. The company sells and installs solar panels, battery storage, and EV chargers nationwide across England, Scotland and Wales, with its customer support team based in Manchester. In 2026 the company announced Grand Designs presenter Kevin McCloud as brand ambassador.
The company
Active UK company trading since 2011. Claims over 50,000 residential installations completed as of July 2025 and describes itself as the UK's largest residential solar installer, a claim echoed by The Eco Experts' installer guide. Sister company Project Better Energy Limited shares the same Burton-on-Trent base.
What they install
Own-brand “Evolution” panels (flagship Evo Max Super, 480W, with a 99-year product warranty), battery storage via their CURV range, and Fox ESS inverters and batteries, for which they are a Fox ESS Premier Partner. EV chargers are sold as an add-on.
Accreditations
MCS certified via NAPIT (certificate NAP-17166), HIES approved, CTSI Consumer Code member, and an FCA-regulated credit broker (FRN 704308) offering finance through Tandem. MCS certification means installs qualify for the Smart Export Guarantee.
Things to know before reading on
- Project Solar sells to owner-occupied houses only; their quote form does not accept flats or rented properties
- Quotes are bespoke from an in-home or video survey; there is no public price list
- Finance is available including a buy-now-pay-later product (4 months deferred, then 8.9% APR via Tandem); 8.9% APR over a long term adds substantially to the total cost
- Their advertised average first-year saving is £1,032, based on their own customer data; treat any saving projection as an estimate, not a promise
Project Solar UK reviews: what customers actually say
Project Solar UK holds a 4.5-star “Excellent” Trustpilot rating from more than 6,700 reviews as of June 2026. That headline number is genuinely strong for a high-volume national installer, but the distribution tells you more than the average: when last fully captured (October 2025, 6,046 reviews), 80% were five stars and 10% were one star, with very little in between. People either have a smooth experience or a frustrating one.
What the positive reviews say
- Professional, tidy installation teams
- Most installs completed in a single day
- Clear explanations of the system and app
- Good communication up to installation day
What the critical reviews say
- Difficulty reaching aftercare once the install is done
- Scaffolding left up for weeks after completion
- Savings coming in below the sales projection
- Repeated sales calls and pressure to sign on the day of the survey
Themes above are drawn from Trustpilot reviews and MoneySavingExpert forum threads; individual experiences vary, and the company replies to the large majority of negative reviews. As with any installer, weight recent reviews more heavily than old ones.
The 99-year “lifetime” warranty, explained
The lifetime guarantee is Project Solar's headline differentiator, and it is real, but it covers less than the marketing shorthand suggests. The company's own claims page sets it out precisely: panels carry a 99-year manufacturer product warranty as standard, while batteries and workmanship are covered for 10 years.
| Component | Project Solar Cover | Typical Industry Cover |
|---|---|---|
| Panels (product warranty) | 99 years | 12–25 years |
| Workmanship (the installation) | 10 years | 2–10 years |
| Battery storage | 10 years | 10–12 years |
How to read a 99-year warranty
A panel product warranty pays out when a panel itself fails, which is rare: panels are the most reliable component of any solar system. The faults that actually generate callouts (inverters, wiring, roof fixings) fall under the 10-year workmanship and component warranties, the same territory most established independent installers cover. The 99-year figure is also only as good as the companies behind it over that timescale. It is a genuine extra, just not the part of the paperwork that will matter most in practice. Our solar panel repair guide explains which warranty covers which fault.
Separately, Project Solar offers a Year One Performance Guarantee: if your system generates less than its personalised first-year projection, the company says it will cover the shortfall. Keep your projection document and your generation data so you can hold them to it.
How much does Project Solar UK cost?
Project Solar does not publish prices; every quote follows a survey. Third-party review sites that have collected customer quotes report figures of roughly £6,100 for a 3.5 kW solar-only system, £9,800 for 4.5 kW with a 5 kWh battery, and £13,000+ for 6 kW with a 10 kWh battery and EV charger. Quotes reported on the MoneySavingExpert forum run higher, including £15,900 (offered as a same-day price, against £19,700 otherwise) for a 12-panel system with an 8.6 kWh battery; several forum threads describe quotes well above what posters were subsequently quoted elsewhere.
| System | Project Solar (reported) | Independent Market Range |
|---|---|---|
| 3–3.5 kW solar only | ~£6,100 | £5,700–£7,000 |
| 4 kW solar only | Not published | £6,600–£8,500 |
| 4–4.5 kW + ~5 kWh battery | ~£9,800 | £9,600–£13,000 |
| 6 kW + ~10 kWh battery + EV charger | £13,000+ | £14,500–£19,000 |
Reported figures from solaradvice.co.uk, topgreendeals.co.uk and ecocosts.com (2026); independent market ranges from our UK solar panel cost guide. Because Project Solar quotes are bespoke, your number may land anywhere relative to these.
The honest read on pricing
The collected quotes range from competitive to well above market, which is exactly what you'd expect from survey-priced selling: the price flexes to the customer. That makes comparison quotes more important with Project Solar than with an installer who publishes fixed package prices. Get your Project Solar quote in writing, then put the identical spec (panel wattage, battery size, inverter brand) in front of two or three local MCS-certified installers and compare totals.
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Compare Quotes ↓The sales process: what to expect
Project Solar sells through booked surveys, in-home or by video, followed by a quote presented at or shortly after the survey. The most consistent criticism across forums and review platforms concerns this stage: multiple MoneySavingExpert threads describe discounts conditional on signing the same day, and persistent follow-up calls after an initial enquiry.
None of this is unique to Project Solar, and a same-day discount is not in itself improper. But it is worth knowing your statutory position and the simple counter-move: a fair price today is still a fair price next week.
Your protections
- 14-day statutory cooling-off period on contracts signed at home or remotely; cancelling within it costs you nothing
- HIES / CTSI consumer code membership gives you a formal complaints and dispute resolution route
- Finance through an FCA-regulated broker comes with Section 75-style credit protections on eligible agreements
Before you sign anything
- Get the full spec in writing: panel model and wattage, inverter brand, battery make and usable capacity
- Ask for the cash price and the financed total side by side
- Treat “today only” discounts as a prompt to pause, not to hurry
- Collect at least two independent quotes for the same spec before deciding
Project Solar UK vs independent installers
| Factor | Project Solar UK | Independent MCS Installers |
|---|---|---|
| Pricing | Bespoke quotes; reported range competitive to high | Typically £6,600–£8,500 for 4 kW; many publish prices |
| Panel warranty | 99-year product warranty (own-brand panels) | 12–25 years (major brands) |
| Workmanship warranty | 10 years | 2–10 years |
| Equipment choice | Own-brand Evolution panels, CURV / Fox ESS storage | Wide choice of panel and battery brands |
| Sales approach | Surveyed quotes; same-day incentives reported | Varies; typically quote-and-wait |
| Aftercare | National support team; mixed reviews | Direct line to the installer; varies by firm |
| Company scale | 50,000+ installs, trading since 2011 | Varies; check trading history and reviews |
Our verdict
Project Solar UK is an established, properly accredited installer with installation quality that reviewers rate highly, and the long panel warranty is a real (if overweighted) extra. The caution flags are commercial, not technical: bespoke pricing that demands comparison shopping, and a sales process that rewards customers who refuse to be hurried. If you like their survey and their kit, there is nothing wrong with buying from them; just do it at a price you have verified against the local market, ideally with quotes from independent MCS-certified installers in your county.
Project Solar UK Reviews FAQ
Is Project Solar UK legitimate?
Yes. Project Solar UK Limited (Companies House 07673744) has traded since 2011 from its Burton-on-Trent headquarters, is MCS certified via NAPIT, HIES approved, a CTSI consumer code member, and an FCA-regulated credit broker. It claims over 50,000 residential installations and is widely described as the UK's largest residential solar installer.
Are Project Solar UK reviews good?
Mostly, with a polarised tail. The company holds a 4.5-star Trustpilot rating from over 6,700 reviews; around 80% are five stars, praising tidy one-day installations and clear communication, while roughly 10% are one star, most often citing aftercare response times, scaffolding delays, and sales pressure.
Is the Project Solar lifetime guarantee real?
Yes, but read it precisely: it is a 99-year manufacturer product warranty on the panels themselves. Workmanship and batteries are covered for 10 years, which is in line with good independent installers. Panel failure is rare; most real-world faults (inverters, wiring, fixings) fall under the 10-year cover, not the 99-year warranty.
How much does Project Solar UK cost?
There is no public price list; every quote follows a survey. Third-party review sites report roughly £6,100 for 3.5 kW solar-only and £9,800 for 4.5 kW with a 5 kWh battery, while MoneySavingExpert forum posters report substantially higher quotes, including £15,900 to £19,700 for a 12-panel system with an 8.6 kWh battery. Compare any quote against the independent market (£6,600 to £8,500 for a 4 kW system) before signing.
Does Project Solar UK pressure you to sign on the day?
Multiple MoneySavingExpert forum threads and critical Trustpilot reviews report discounts conditional on signing during or straight after the survey, plus persistent follow-up calls. A same-day discount is legal, but you have a 14-day statutory cooling-off period on contracts signed at home, and no fair price evaporates in a week. Take the quote away and benchmark it.
What panels and batteries does Project Solar UK install?
Their own Evolution panel range (flagship Evo Max Super, 480W) carrying the 99-year product warranty, battery storage from their CURV range, and Fox ESS inverters and batteries, for which Project Solar is a Fox ESS Premier Partner. EV chargers are available as an add-on.
Does Project Solar UK cover Scotland and Wales?
Yes. The company describes itself as nationwide, actively markets in Scotland, and its MCS registration covers all UK regions including Scotland, Wales and Northern Ireland. Note they install for owner-occupied houses only, not flats or rental properties.
What are the alternatives to Project Solar UK?
The main alternative is getting two or three quotes from independent MCS-certified installers in your county, who typically install equivalent tier-one equipment at £6,600 to £8,500 for a 4 kW system. National alternatives include Octopus Energy and EON Next, though both also carry brand premiums. Comparing quotes for an identical spec is the only reliable way to find the best value.
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Sources
- Companies House: Project Solar UK Limited (07673744)
- Trustpilot: Project Solar UK
- Project Solar UK: Our Claims Explained
- MoneySavingExpert Forum: Project Solar UK threads
- MCS: Microgeneration Certification Scheme
Review scores and reported prices captured June 2026. Project Solar UK Ltd holds NAPIT certification NAP-17166 in the MCS installer dataset used for our directory. This page is an independent editorial review; we have no commercial relationship with Project Solar UK.
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.
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