Solar Panel Manufacturers: A UK Buyer's Guide

When you're choosing solar for a UK home, the panel brand is one of the first decisions you'll face, yet most buyers have no clear picture of who actually makes the modules going on British roofs. This independent guide answers the questions people search for most about solar panel manufacturers: who makes solar panels, which firms are the biggest, where panels are really made, what they're built from, and what the much-quoted Tier 1 label does and doesn't tell you. Smart Solar Homes doesn't manufacture panels or fit them; we're a neutral guide, so the aim here is to help you shortlist brands sensibly rather than sell you one.

Who makes solar panels?

The global market is dominated by a handful of very large manufacturers, almost all headquartered in China. According to InfoLink Consulting's full-year 2025 module shipment ranking, the biggest module makers by volume were JinkoSolar and LONGi (effectively tied at the top), followed by Trina Solar and JA Solar, then names such as Tongwei (TW Solar), Astronergy, DAS Solar and Canadian Solar. Combined shipments from the ranked suppliers reached roughly 536 GW in 2025, with the top four holding around 58% of that volume. These rankings shift year to year, and Jinko and LONGi regularly swap the number-one spot, so treat any precise order as a snapshot rather than a permanent league table.

Hanwha Qcells is another familiar name on UK roofs, popular for its consistent track record, though it sits below the very top tier on raw shipment volume. For a steer on which of these brands suit which roof, see our honest best solar panels UK guide, and our review of the Canadian Solar range if that maker is on your shortlist.

Where are solar panels made?

The vast majority of the world's solar panels are made in China. The International Energy Agency's 2022 report on solar PV global supply chains found that China's share of every key manufacturing stage, from polysilicon and ingots through to wafers, cells and finished modules, exceeds 80%, and for polysilicon, ingots and wafers it was set to approach 95% based on capacity then under construction. The IEA also noted that Xinjiang province alone accounted for roughly 40% of global polysilicon production. That concentration is why almost every mainstream brand sold here, whatever its corporate badge, relies heavily on a Chinese supply chain.

This matters for buyers mainly in terms of bankability and warranty support rather than day-to-day performance: a panel's quality depends on the maker's engineering and quality control, not simply on its country of assembly.

Are any solar panels made in the UK?

Genuine British module manufacturing is rare and small-scale; almost every panel installed in the UK is imported. Sharp once ran a solar module assembly plant in Wrexham, but closed it in 2014, citing uncompetitive European panel prices against cheaper imports. Today a few small British makers and assemblers exist, such as Solar Capture Technologies in Northumberland and GB-Sol in South Wales, but they operate at a tiny fraction of the scale of the Chinese majors. If buying British-made is important to you, it's worth asking installers directly, but expect limited choice and a price premium. For most homeowners the more useful question isn't where a panel is assembled but whether the manufacturer is large and stable enough to honour a 25-year warranty.

What are solar panels made of?

Around 95% of panels on the market are built around crystalline silicon cells. A typical module is a layered sandwich: monocrystalline silicon cells (with silver paste contacts and copper interconnects) laminated between a tempered low-iron glass front and a polymer backsheet, using EVA encapsulant, all held in an aluminium frame with a junction box on the rear. The U.S. Department of Energy confirms crystalline silicon as the industry-standard cell technology, and it has held roughly 90 to 95% of the global market for around two decades. The main alternative, thin-film, is rare on UK homes; we cover where it does fit in our thin-film solar panels guide.

The headline number most people focus on is efficiency, the share of sunlight a panel turns into electricity, which for current residential modules sits in the low-to-mid 20s percent. Our solar panel efficiency explainer sets out why that figure is only part of the story, and our guide to solar cell types covers the differences between PERC, TOPCon and back-contact designs.

What does Tier 1 actually mean?

Tier 1 is a measure of bankability, not quality. The Tier 1 list is compiled by BloombergNEF, and a manufacturer earns a place by having supplied its own-brand, own-manufacture products to at least six different projects that were financed, on a non-recourse basis, by six different commercial banks in the previous two years (counting only project financings above 10 MW). In other words, it reflects whether banks are willing to lend against a maker's panels, which is a useful proxy for financial stability. BloombergNEF is explicit that the list should not be used as a measure of product quality and that a Tier 1 listing is not a recommendation for a company or its products. So treat Tier 1 as a sign a manufacturer is established and likely to still be around to honour warranties, not as proof its panels are the best performing. We unpack the distinction further in our guide to Tier 1 vs Tier 2 solar panels.

How to choose a manufacturer for your home

For a UK household, the sensible filters are straightforward. Pick a maker large and financially stable enough to stand behind a long warranty (bankability), check the product and performance warranty terms rather than just the brand name, and weigh efficiency mainly if your roof space is tight. Beyond that, the panel choice usually matters less than the quality of the installation. The UK's Microgeneration Certification Scheme (MCS) certifies installations and accredits installers, and a record 267,032 rooftop solar installations were certified in 2025, taking the cumulative total past 1.85 million. Choosing an MCS-certified installer, then picking from the quality panels they fit regularly, tends to serve buyers better than fixating on a single badge. To turn a shortlist into firm figures, our guide to solar panel cost and savings sets realistic expectations.