A typical residential rooftop array – choosing the right installer matters as much as the panels themselves.

The 2026 Shortlist at a Glance

Before we get stuck into the detail, here's the quick version. The UK market is increasingly fragmented, with strong regional specialists carving out reputations, whilst the US market is dominated by a handful of national giants alongside scrappier challengers offering more flexible deals. The names below kept appearing across credible review aggregators, accreditation registers and trade body recommendations.

The Best UK Solar Installers in 2026

The UK industry has matured enormously in the past three years, and the result is that you've got more genuinely competent installers than ever to choose from. The flip side is that the market is now noisy, and a lot of national-sounding outfits are actually lead-generation shells subcontracting to whoever's nearest. The companies below all have substance behind the marketing.

UK rooftop solar adoption has accelerated sharply, putting pressure on installers to keep quality high.

Glow Green – Best Overall UK Installer

Glow Green takes the top spot for 2026 on the strength of a genuinely well-rounded offer: competitive pricing, MCS and NICEIC accreditations, and a sensible panel line-up that leans on respected brands like Perlight and DMEGC. They also offer flexible financing, which matters because solar is still very much a five-figure purchase for most households. They're not the flashiest name on the list, but they consistently deliver the boring, dependable stuff that actually matters when you're entrusting someone with your roof.

Solar4Good – Best for Customer Service

Founded in 2020, Solar4Good has rocketed to a 4.9-star Trustpilot rating, completing roughly 1,500 projects a year. Three customisable residential packages start at £5,500 for ten panels and climb past £9,000 for a sixteen-panel system paired with 8.7kWh of battery storage. They supply panels from JA Solar, Jinko, Trina Solar, Qcells and Fox ESS, hold MCS accreditation, and operate a Price Match Guarantee. The turnaround from quote to installation can be as quick as two weeks, which is genuinely impressive in a market where eight to twelve weeks is closer to the norm.

Sunsave – The Subscription Innovator

Sunsave is doing something genuinely different: it's the only UK installer offering a true solar subscription, called Sunsave Plus, which bundles maintenance and 24/7 monitoring into a single monthly fee. Alongside that sits the Sunsave Guarantee, which covers free replacement parts, downtime cover, insurance and hands-on support with manufacturer warranty claims. For households who want solar without becoming amateur electrical engineers, it's a compelling proposition.

Project Solar – Best for Long Warranties

Project Solar is one of the largest independent installers in the UK and has built its reputation on long warranty coverage and clear, jargon-free paperwork. Pricing is competitive, finance options are easy to navigate, and turnaround times tend to be quicker than industry average. If you're the sort of buyer who reads every line of a warranty document before signing, this is the company most likely to make you smile.

Geo Green Power – Best for Commercial

If you've ever pulled into a Moto motorway services and noticed the solar canopy, there's a good chance Geo Green Power put it there ' they've delivered more than a dozen of those sites. Their client list also includes Mercedes Benz, JCB and Savoy Cinemas, and they back installations with a ten-year workmanship warranty. For business owners considering commercial rooftop solar or carports, they're the natural first call.

Other UK Names Worth Knowing

The Accreditations You Absolutely Must Insist On

This is the bit most buyers skim, and it's the bit that causes the most regret three years down the line. The UK solar industry is self-regulated, which is a polite way of saying nobody is going to stop a dodgy operator from putting up a website. Your protection is the alphabet soup of accreditations below.

The Best US Solar Installers in 2026

The US market is structurally different from the UK. Federal tax credits, state-level incentives and a much bigger appetite for leasing arrangements mean the conversation often centres on how you pay rather than what you buy. There are also more national-scale operators, which has its own pros and cons.

Battery storage doubles the value of a domestic solar install — but the inverter brand matters as much as the cells.

Sunrun – Best Overall US Solar Company

Sunrun stood out as the best US solar company overall after analysis of thousands of customer reviews, equipment options, payment plans and warranties. It's one of the largest residential solar providers in the country, offering rooftop solar systems, battery storage and broader home energy services. The defining feature is flexibility: customers can choose between four main routes ' a lease, a Power Purchase Agreement (PPA), a solar loan, or an outright system purchase. Most customers pick a lease or PPA precisely because the upfront cost is so low. Their Brightbox battery is the in-house storage option, and installation is delivered through a mix of in-house teams and certified third-party partners.

Freedom Power Solar – Most Flexible Payment Options

If Sunrun's leases don't quite fit and you'd rather have more granular control over how you finance the system, Freedom Power Solar has built its reputation on offering the most adaptable payment structures in the market. That flexibility is especially valuable for buyers with unusual income patterns or those who plan to sell within a few years.

Project Solar (US) – Most Transparent Pricing

Not to be confused with the UK installer of the same name, the US-based Project Solar has carved out a niche as the company most willing to publish prices upfront ' a refreshing change in an industry notorious for opaque, sales-driven quotes. If you're tired of high-pressure salespeople and want to know what you're paying before someone arrives at your kitchen table, this is the route in.

The Other US Names – A Quick Note of Caution

SunPower was historically a premium choice both as a panel manufacturer and as an installer network, but the company filed for bankruptcy in August 2024 and new installations through SunPower itself have halted. Existing customers retain their hardware warranties via the manufacturer side of the business, but if you're starting from scratch in 2026, SunPower is no longer a route to buy. Blue Raven Solar, which operated as a SunPower-affiliated dealer, continues to score well on customer satisfaction independently. Tesla Solar remains a viable option particularly for buyers attracted to the solar roof shingles and the tight integration with the Powerwall battery.

Head-to-Head: Top Three UK Installers

The numbers below pull together the differentiators that genuinely matter when you're choosing between the strongest UK contenders. Treat it as a starting point for your shortlist conversations rather than the final word.

The Panel Brands These Companies Actually Install

You'll notice the same handful of panel manufacturers keep coming up across multiple installers, and that's not a coincidence ' these are the brands with the strongest track records on efficiency, warranty enforcement and supply reliability. Knowing who makes the kit on your roof is just as important as knowing who screwed it down.

Premium tier-one panel brands dominate the supply chains of the best installers.

How These Companies Actually Score

Translating accreditations and review counts into something visual makes it easier to see where each company is genuinely strong and where it's just average. The bars below reflect my read of the UK market based on customer feedback, accreditation depth, transparency and warranty strength.

The Honest Pros and Cons of Going Solar Right Now

Even the best installer can't compensate for unrealistic expectations about what solar can and can't do. Here's the balanced view, free of the usual evangelism.

Solar Kits and Power Stations You Can Actually Buy Today

A full domestic install is a months-long process, but there is no reason to wait if you want to start playing with solar now. A modern portable solar generator pairs a lithium-iron-phosphate battery with a high-efficiency inverter and a USB-C/AC output mix — useful for camping, garden offices, blackout backup, and (frankly) understanding how solar generation actually behaves before you commit to a roof install.

Four picks worth your shortlist:

Jackery Explorer 1000 v2 — Best All-Rounder

1,070Wh capacity, 1,500W pure-sine AC output, with around a two-hour full recharge from the matching 200W folding panel. The default choice for most UK buyers — well supported, five-year warranty, refined companion app. Pair it with a 100W folding panel and you have a credible "off-grid weekend" kit.

See Jackery Explorer 1000 v2 on Amazon UK

EcoFlow DELTA 2 — Best for Home Blackout Backup

1,024Wh capacity but a chunky 1,800W AC inverter (X-Boost pushes to 2,200W), making this the one to choose if you want to keep a kettle and a small fridge running through a power cut. LFP cells rated 3,000 cycles to 80% capacity, and the modular battery can stack to 3,072Wh with the add-on pack.

See EcoFlow DELTA 2 on Amazon UK

Anker SOLIX C1000 — Best Compact 1kWh Unit

1,056Wh in a notably smaller chassis than the Jackery and EcoFlow rivals — Anker's compact engineering shows. 1,800W AC output (2,400W surge), six AC outlets, and a quick 58-minute full recharge from the wall. The compromise: a smaller maximum solar input (600W) than the EcoFlow.

See Anker SOLIX C1000 on Amazon UK

ECO-WORTHY 200W Solar Panel Kit — Best DIY Starter

If you are more interested in the panels than a battery box, ECO-WORTHY's 200W twin-panel kit comes with a charge controller, cables and mounting brackets — the cheapest way to learn whether DIY solar suits you before paying an installer. Roof-mountable but most buyers use it for sheds, garden offices and caravans.

See ECO-WORTHY 200W Solar Panel Kit on Amazon UK

Costs, Quotes and How to Get the Best Deal

Solar pricing is one of the more variable purchases you'll encounter, because every roof is genuinely different. That said, Solar4Good's published package pricing gives you a useful anchor for residential systems in the UK.

My standard advice is to get three written quotes from MCS-accredited installers, ensure each quote specifies panel brand and model, inverter brand, battery brand (if applicable), expected annual generation in kWh, and total system cost including scaffolding and electrical work. If a quote is missing any of those, push back. The good installers will respect you for asking.

Which Solar Company is Right for You?

Matching the right installer to your priorities is the single most important decision in the process.

My Overall Verdict on the 2026 Solar Installer Market

Frequently Asked Questions

Done right, solar is a twenty-five-year asset – choose the installer with the same care you'd choose the roof itself.