Who are Leapton?

Leapton Energy was founded in 2012 in Kobe, Japan. It opened a sales and engineering office in Shanghai the same year, a Tokyo branch in 2015, and its main panel factory in Changshu, China, in 2017. Today it sells in more than 70 countries, keeps a European warehouse in Rotterdam, and also makes home batteries and inverters. It owns more than 60 solar power stations in Japan, so it is a user of its own panels as well as a maker.

Three things matter for a UK homeowner:

• It’s a mid-sized maker. Leapton reported a production capacity of about 3GW a year at the end of 2024. Jinko, the largest, can make well over 100GW. Smaller isn’t worse, but it does mean less of a cushion if the market turns.
• It has an independent testing record. Kiwa PVEL puts panels through accelerated stress tests for heat, damp, freezing, mechanical load and hail. Leapton was named a Top Performer in both the 2024 and 2025 scorecards. We couldn’t confirm a 2026 result.
• It sells through importers, not its own local offices. In Australia, Leapton opened an office in 2021 and later closed it, leaving warranty claims to go through the importers. We couldn’t find a UK office either. That’s common for smaller brands, and it’s why the installer matters so much with this one.

In the UK, Leapton is a budget-conscious choice. Most installers default to JA, Jinko, Trina or Aiko, and Leapton turns up mainly on keenly priced quotes and in European wholesalers’ catalogues.

Where are Leapton solar panels made?

In China, in Jiangsu province. Leapton opened its first factory in Jiangyin in 2015 and its second, larger one in Changshu in 2017. The company is Japanese-owned and says its panels are built to Japanese industry standards, which is why you’ll sometimes see Leapton described as a Japanese panel. The design and ownership are Japanese. The manufacturing is Chinese.

That’s the same as almost every mainstream panel fitted in the UK. What matters is the panel’s testing record, the warranty and who stands behind it, not the country on the box (best solar panels UK).

The Leapton range in 2026

For a house, you want one of the N-type TOPCon panels in the first three rows. N-type cells are more efficient, cope better with heat and age more slowly than the older PERC cells. If you’re quoted an LP166 or a panel with “MH” in its code in 2026, it’s usually older PERC technology and should be priced accordingly (types of solar panels).

Leapton model codes decoded

Take LP182*182-M-54-NB-440W:

• LP is Leapton’s prefix.
• 182*182 is the size of each cell in millimetres. 182*210 means a taller cell.
• M means monocrystalline.
• 54 is the number of full cells, cut into 108 halves. That’s the standard home size.
• N means N-type. B means bifacial with glass on both sides. H marks the standard single-glass version.
• 440W is the power.

Which wattage is which?

People search for Leapton panels by wattage, so here’s a quick guide. 400W to 415W panels are older PERC models. 430W to 455W are the current home panels. 460W is usually an older, longer 60-cell panel. 500W, 600W and 650W are large commercial panels, over two metres long and too big for most house roofs (solar panel sizes).

Leapton 440W solar panels: a closer look

The Leapton 440W is the model most often quoted in the UK and Europe, usually in its all-black, glass-on-both-sides version.

Two points on the build. Bifacial means the back of the panel can also generate from reflected light. On a house roof, where the panel sits a few centimetres above the tiles, that adds next to nothing, so don’t pay extra for it. The real benefit is the second sheet of glass, which protects the cells better than a plastic backsheet and should help the panel last. The cost is weight: 24kg against 21kg for the single-glass version, which is fine for a normal roof but worth knowing (panel types compared, solar panel maintenance).

Our scores

Efficiency and real-world UK output

Leapton’s home panels run from 22.0% efficiency at 430W to 23.0% at 450W. That’s in line with the mainstream at 22–23%, and a step behind the best panels at about 24–25% (most efficient solar panels). The temperature coefficient is -0.30% per °C, which is good. It means the panel loses less output on a hot roof than older PERC panels did.

In practice, one 440W Leapton panel on a south-facing UK roof generates roughly 400–450kWh a year depending on where you live. Nine of them make a 4kW system producing about 3,600–4,100kWh a year, worth roughly £700–£790 a year at October 2026 electricity prices if you use half of it at home. You’d get almost exactly the same from a Jinko, JA or Trina panel of the same wattage. At this level, the differences between brands are in the warranty and the company, not the output. See solar panel efficiency, solar panel output and solar panel payback.

The size is standard too. At 1,722mm long, it fits the same roof layouts and mounting rails as its rivals (how many panels fit your roof).

Leapton solar panel warranty

On paper, this is as good as the big brands. The question is how easy it would be to use. Leapton has no UK office that we could find, so a claim would go through your installer to whoever imported the panels. If both are still trading, that works. If your installer has closed, you’d be dealing with a company based in Japan and China through a Dutch warehouse.

That isn’t a reason to avoid Leapton. It’s a reason to protect yourself the usual way:

• Choose an installer that has traded for several years and is MCS-certified.
• Make sure the workmanship guarantee is insurance-backed, so it survives if the installer doesn’t.
• Keep the datasheet, the warranty document and the panel serial numbers with your handover pack.
• Remember that panels rarely fail. The inverter is far more likely to need attention (how long inverters last, solar inverters explained).

More in solar panel warranties explained.

Is Leapton Tier 1? Test results and ranking

Tier 1

Tier 1 is BloombergNEF’s list of panel makers whose products banks are willing to finance on large projects. It measures financial standing, not quality. Leapton says it has been Tier 1 ranked for many years in a row, and several review sites repeat that. But the published copy of the list for the second quarter of 2026 that we checked had 42 makers on it, and Leapton wasn’t one of them.

Makers move on and off this list from quarter to quarter, so that isn’t a red flag in itself. If Tier 1 status matters to you, ask the installer for evidence that’s dated this year.

Independent testing

This is Leapton’s strongest card. Kiwa PVEL named Leapton a Top Performer in its PV Module Reliability Scorecard in both 2024 and 2025. The scorecard is the best-known independent test of how panels hold up to years of heat, damp, frost, wind load and hail, and not every brand makes it. We couldn’t confirm whether Leapton appears in the 2026 edition.

Where Leapton ranks

By size, Leapton is well outside the world’s top ten panel makers. By quality, the evidence puts it in the same band as the mainstream brands. In our own rankings it sits just below the big four, held back by company size and UK support, not by the panel. See best solar panels UK for the full list.

Leapton solar panels price in the UK

Leapton’s main selling point is price. In October 2026, one European trade marketplace listed the 450W all-black panel at about €0.13 per watt, or roughly €60 a panel, in small quantities from stock in Germany. UK guides put the single-panel retail price at about £120–£200. Installers buying by the pallet pay much nearer the trade figure. Mainstream panels from Jinko, JA and Trina typically cost installers £70–£120 each, and Leapton usually comes in below that.

Keep that saving in proportion. Panels are only about a sixth of the cost of a fitted system, so even a big discount on the panel takes a few hundred pounds off the bill, not thousands. What you’ll pay for a complete installation is much the same whichever mainstream panel goes on the roof:

A quote using Leapton panels should sit in the lower half of those ranges. If it’s at the top, you’re paying a premium-brand price for a value-brand panel. Prices include fitting, scaffolding, the inverter and 0% VAT, which applies until 31 March 2027 (VAT on solar panels). For the full breakdown, see solar panel cost, the 4kW solar system guide and 4kW solar with a battery.

Leapton solar panels vs Jinko, JA Solar and Trina

Leapton vs Jinko is the comparison most people want. On the roof you wouldn’t notice a difference in output between two panels of the same wattage. Jinko wins on company size, UK stock and the ease of finding a matching panel in ten years. Leapton wins on price. If the Leapton quote is a few hundred pounds cheaper for the same system, that’s a fair trade. If the two quotes are within £100 or so, take the Jinko.

Read our reviews of Jinko, JA Solar, Trina, LONGi, Aiko and the Aiko Neostar, and of other value brands such as Risen, DMEGC and Suntech.

Pros & cons

Leapton solar panels: frequently asked questions

Going Solar UK is an introduction service, not an installer, and has no connection with Leapton. Company details are from Leapton Energy’s website, checked in October 2026. Specifications are from Leapton datasheets as listed by ENF Solar and European distributors. Efficiency for the 440W double-glass model is calculated from its rated power and size. Kiwa PVEL results are from the PVEL scorecard site, and we could not confirm a 2026 listing. Tier 1 status is from a third-party copy of the BloombergNEF list for the second quarter of 2026. The trade price is from one European marketplace listing in October 2026 and will vary. The note on Leapton’s Australian office is as reported by SolarQuotes. Competitor figures are typical for current ranges. Installed prices are typical 2026 UK estimates. Always confirm the exact model, datasheet and warranty with an MCS-certified installer.