Project Solar UK Review 2026
Prices, panels, customer reviews, and how they compare to Octopus, Sunsave, and local installers
Key Takeaways
- Trustpilot: 4.7 stars from 5,300+ reviews
- Installations: 45,000+ systems since 2011
- Pricing: From ~£6,100 (3.5 kW) — higher than average but includes premium panels
- Panels: Evo Max Super (22.18% efficiency) and SunPower Maxeon range
- Warranty: Lifetime panel warranty on select systems, 10-year workmanship
- Accreditations: MCS, NAPIT, HIES, FCA regulated
Project Solar UK is one of the largest residential solar installers in the country, with over 45,000 systems installed since 2011. They operate from more than 20 offices nationwide and hold a 4.7-star rating on Trustpilot.
That said, size and good reviews don't automatically make them the right choice for your home. Their pricing sits above the UK average, and some customers have had trouble getting post-installation support. This review looks at what they actually offer, what it costs, and how the service compares with Octopus Energy and local MCS-certified installers.
Who Are Project Solar UK?
The company (Companies House #07673744) is headquartered in the North West and Midlands, with offices across England, Scotland, and Wales. They've been fitting solar panels since 2011, making them one of the longer-established national installers.
Unlike some competitors who subcontract to local teams, they use their own employed installation crews. The company claims to have prevented over 150,000 tonnes of carbon emissions through its installations, though that figure is hard to verify independently.
Beyond solar panels, the company offers battery storage (their own-brand CURV units), solar roof tiles, and EV charger installation. They also run a grid services programme called Project Solar+, which lets you earn extra income by allowing your battery to support the national grid during peak demand.
Which Solar Panels Do They Install?
The company primarily fits two panel ranges: their own-brand Evo Max Super and the well-regarded SunPower Maxeon series.
| Panel | Wattage | Efficiency | Cell Type | Warranty |
|---|---|---|---|---|
| Evo Max Super | 480W | 22.18% | TOPCon Monocrystalline | Lifetime (select systems) |
| Evolution EVO-490 | 490W | ~22.5% | TOPCon Monocrystalline | 99-year limited product |
| SunPower Maxeon | Up to 440W | 22.8% | IBC Monocrystalline | 40-year |
The Evo Max Super is their standard offering for most installations. At 22.18% efficiency and 480W per panel, it competes well with panels from JA Solar and Trina that many other installers use. The SunPower Maxeon option costs more but offers the highest efficiency ratings available for residential panels.
One thing worth noting: the "99-year limited product warranty" on the EVO-490 sounds impressive, but read the full terms carefully. Limited warranties typically have exclusions around degradation thresholds and transferability if you sell your home.
How Much Does Project Solar Cost?
They don't publish fixed prices — every quote is tailored to your property, roof type, and energy usage. But based on customer reports and industry benchmarks, here's what to expect:
| Package | System Size | Estimated Cost | Best For |
|---|---|---|---|
| Solar only | 3.5 kW (8 panels) | ~£6,100 | 2-3 bed house |
| Solar + battery | 4.5 kW + 5 kWh battery | ~£9,800 | 3 bed house |
| Full package | 6 kW + 10 kWh + EV charger | ~£13,000+ | 4-5 bed house |
These prices are higher than the UK average. The MCS national average for a 3-4 kW system sits at around £7,279 as of early 2026, so Project Solar's pricing for a similar system with battery storage is at a premium.
Part of that premium goes towards their higher-efficiency panels and longer warranty coverage. Whether it represents good value depends on how much you weigh warranty length versus upfront cost. A local MCS installer might offer a comparable system for 10-20% less using different panel brands.
All residential solar installations currently qualify for 0% VAT until March 2027, which applies regardless of which installer you choose.
Want to see what solar would save you? Use our free calculator for a personalised estimate.
Battery Storage Options
Project Solar offers their own-brand battery called the Project CURV in two sizes:
| Battery | Capacity | Best For | Warranty | Features |
|---|---|---|---|---|
| Project CURV 6 | 6 kWh | 1-3 bed homes | 10 years | Expandable, app-controlled |
| Project CURV 12 | 12 kWh | 3-5 bed homes | 10 years | Expandable, app-controlled |
Both CURV batteries can be expanded if your needs change, and they're managed through a smartphone app. The 10-year warranty is standard for the industry — comparable to what you'd get with a Enphase or Fox ESS battery.
Project Solar also installs third-party batteries from SolaX and FoxESS, so you're not locked into their own-brand option. If you want a Tesla Powerwall 3, you'll likely need to look at a different installer — Project Solar doesn't currently offer Tesla products.
For a detailed look at battery options, see our Tesla Powerwall 3 review or home battery guide.
Installation Process
Project Solar follows a fairly standard process for UK solar installations:
- Online quote: Enter your details on their website for an initial estimate
- Phone consultation: A sales advisor discusses your energy usage and system sizing
- Site survey: A technician visits to assess your roof, shading, and electrical setup
- System design: They design a system based on the survey findings
- Installation: Typically completed in one day for standard roof-mounted systems
- DNO notification: They handle the notification to your Distribution Network Operator
- Handover: System testing, MCS certification, and monitoring setup
The company quotes "around two weeks" from consultation to completion, though DNO approvals and complex installations can push that out. One-day installation for a standard system is realistic and in line with what other national installers offer.
What Do Customers Say?
Review Summary
- Trustpilot: 4.7 stars from 5,300+ reviews
- Reviews.io: Listed with additional customer feedback
- Checkatrade: Profile available for local verification
What customers praise
The majority of reviews highlight professional sales consultations with no high-pressure tactics. Customers frequently mention clear communication throughout the process, from initial quote to post-installation. The installation teams receive consistent praise for being efficient and tidy. In a recent industry survey, Project Solar topped three out of four customer satisfaction categories.
What customers complain about
The recurring complaints fall into three categories:
- Post-installation support: Several customers report difficulty reaching the aftercare team, with scaffolding left on-site for weeks after installation in some cases.
- Over-optimistic savings estimates: Some customers found their actual savings fell short of what the sales team projected. One customer reported bills rising from £87 to £270 per month despite being shown projected bills of £2-3.
- Pricing: Multiple reviewers note that Project Solar's quotes came in higher than competing offers for similar system sizes.
These complaints represent a small minority of total reviews, but they're worth knowing about. The savings projection issue in particular is something to watch for — always run your own numbers using an independent calculator before committing.
Pros and Cons
Pros
- ✓ 45,000+ installations — proven track record since 2011
- ✓ 4.7-star Trustpilot rating from 5,300+ verified reviews
- ✓ High-efficiency panels (22%+) with lifetime warranty options
- ✓ Full accreditations: MCS, NAPIT, HIES, FCA regulated
- ✓ Nationwide coverage with 20+ offices
- ✓ Own installation crews (not subcontracted)
- ✓ 10-year workmanship guarantee
- ✓ Grid services programme (Project Solar+) for extra income
Cons
- ✕ Pricing above UK average for comparable system sizes
- ✕ Post-installation support can be slow to respond
- ✕ Some reports of over-optimistic savings projections
- ✕ No Tesla Powerwall option
- ✕ 'Lifetime warranty' terms need careful reading — exclusions apply
- ✕ £325 call-out charges reported for post-install visits
Project Solar UK vs Competitors
How does Project Solar stack up against other major UK solar installers? Here's a side-by-side comparison based on publicly available information:
| Feature | Project Solar | Octopus Energy | British Gas | Local MCS Installer |
|---|---|---|---|---|
| Starting price (3-4 kW) | ~£6,100 | ~£6,163 | ~£7,000 | ~£5,000-6,000 |
| Trustpilot rating | 4.7 stars | 4.8 stars | 3.8 stars | Varies |
| Panel efficiency | 22.18% (Evo Max) | ~21.3% (JA Solar) | ~20-21% | Varies |
| Panel warranty | Lifetime (select) | 25 years | 25 years | 25 years typical |
| Workmanship warranty | 10 years | 10 years | 12 years | 5-10 years |
| Battery options | CURV, SolaX, FoxESS | Fox ESS / Enphase / Tesla | Tesla Powerwall | Varies |
| Export tariff | Project Solar+ | Octopus Flux (up to 31p) | Standard SEG | Any SEG provider |
| MCS certified | Yes | Yes | Yes | Check individually |
| Coverage | Nationwide | Nationwide | Nationwide | Local/regional |
Project Solar vs Octopus Energy
The two are priced similarly for entry-level systems. Octopus has the edge on export tariffs thanks to their Flux tariff, which pays up to 31p/kWh during peak hours — though you'll need a battery and smart meter to benefit. Project Solar counters with higher-efficiency panels and their own grid services programme. If maximising export income matters to you, Octopus probably edges it. If panel quality and warranty length are the priority, Project Solar has the advantage.
Project Solar vs local installers
Local MCS-certified installers typically quote 10-20% less for comparable systems. You lose the nationwide support network and long warranty track record, but you gain a more personal service and often faster response times for any post-installation issues. For many homeowners, getting three quotes from local installers alongside a Project Solar quote is the best approach.
Looking for trusted installers near you? Compare MCS-certified companies in your area.
Is Project Solar UK Worth It?
For homeowners who value a proven track record and premium panel efficiency, this is a solid option. The 4.7-star Trustpilot rating from thousands of reviews shows most customers have a good experience.
The main downside is price. You're paying a premium versus local installers, and some of that premium covers their nationwide office network and marketing rather than the hardware on your roof. The "lifetime warranty" is appealing, but most modern panels last 25-30+ years regardless of warranty length, so the practical difference may be smaller than it appears.
Our advice: get a quote from Project Solar, but also get two or three quotes from local MCS-certified installers through our installer directory. Compare the system specs, not just the price. And always run your own savings estimate using our solar calculator rather than relying solely on a sales team's projections.
Best for
- Homeowners who want a large, established installer with a proven track record
- Those who prioritise panel efficiency and long warranties over lowest price
- Properties in areas where local installer options are limited
Look elsewhere if
- Budget is your primary concern — local installers typically offer better value per watt
- You want a Tesla Powerwall battery — Project Solar doesn't offer them
- You want to maximise export income — Octopus Flux tariff is hard to beat
Frequently Asked Questions
Is Project Solar UK a good company?
Project Solar UK has installed over 45,000 systems since 2011 and holds a 4.7-star Trustpilot rating from 5,300+ reviews. They're MCS certified, NAPIT registered, and HIES approved. While their prices are above average, the combination of premium panels, lifetime warranty options, and nationwide coverage makes them a reputable choice. The main watch-outs are post-installation support response times and ensuring savings projections are realistic.
How much does Project Solar UK charge?
Prices are customised per property, but expect around £6,100 for a 3.5 kW solar-only system, £9,800 for a 4.5 kW system with 5 kWh battery, and £13,000+ for a 6 kW system with 10 kWh battery and EV charger. These sit above the UK average of ~£7,279 for a 3-4 kW system.
Does Project Solar UK offer battery storage?
Yes. They offer their own Project CURV battery in 6 kWh and 12 kWh sizes, both expandable and app-controlled with 10-year warranties. They also install SolaX and FoxESS batteries. Tesla Powerwall is not available through Project Solar.
Is Project Solar UK MCS certified?
Yes. Project Solar holds MCS certification for both solar PV and battery storage through NAPIT. This is essential for claiming Smart Export Guarantee payments and ensures your installation meets recognised industry standards.
How long does Project Solar installation take?
Standard installations take one day on site. The full process from initial consultation to completed system is approximately two weeks, though DNO approvals can extend this.
What warranty does Project Solar UK offer?
Lifetime panel warranty on select systems (Evo Max Super range), 10-year workmanship warranty, Year One Performance Promise, and 10-year battery warranty. Read the full warranty terms for exclusions and transferability conditions.
Can I finance Project Solar panels?
Yes. Project Solar is FCA regulated (FRN 704308) and can arrange finance with monthly payment plans. All residential installations qualify for 0% VAT until March 2027.