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Updated April 2026

Best Solar Panels UK (2026)

We compared 6 solar panels on efficiency, price, warranty, and real-world UK performance. Here are the ones worth installing.

See the Comparison

Disclosure: This page contains affiliate links. We may earn a commission at no extra cost to you. All opinions are our own and based on independent research.

Quick Answer: Which Panels Should You Buy?

Best Overall

JA Solar Deep Blue 4.0 (445W) — 22.4% eff.

Best Value

Canadian Solar HiKu7 (450W) — £0.24–£0.33/W

Best Budget

Jinko Tiger Neo (440W) — £0.24–£0.32/W

£5,000–£8,000

System Cost (4kW)

Installed, 0% VAT

3,000–3,400 kWh

Annual Output (4kW)

UK average

22–24%

Top Efficiency

N-type / IBC

25–40 years

Performance Warranty

87–88% at end

Solar Panel Comparison Table

PanelWattageEfficiencyCost/Panel£/WattWarrantyRating
JA Solar Deep Blue 4.0 (445W)445W22.4%£120–£160£0.27–£0.3615 years / 30 years (87.4%)4.7
LONGi Hi-MO 7 (440W)440W22.5%£130–£175£0.30–£0.4015 years / 30 years (88.9%)4.6
Canadian Solar HiKu7 (450W)450W22.0%£110–£150£0.24–£0.3315 years / 30 years (87.4%)4.5
SunPower Maxeon 7 (430W)430W24.0%£280–£380£0.65–£0.8840 years / 40 years (88.3%)4.4
Trina Vertex S+ (445W)445W22.3%£115–£155£0.26–£0.3515 years / 30 years (87.4%)4.5
Jinko Tiger Neo (440W)440W22.3%£105–£140£0.24–£0.3212 years / 30 years (87.4%)4.3

Detailed Reviews

#1

JA Solar Deep Blue 4.0 (445W)

Best overall — performance, availability, and value

4.7/5

£120–£160/panel

Wattage

445W

Efficiency

22.4%

Cost/Watt

£0.27–£0.36

Technology

N-type TOPCon Monocrystalline

Pros

  • Excellent efficiency at 22.4% — among the best in class
  • N-type TOPCon technology with very low degradation
  • Widely available from UK installers — no supply issues
  • Strong 30-year performance warranty
  • Good low-light and high-temperature performance

Cons

  • Not the cheapest panel available
  • Larger panel size may not suit all roofs
  • Less well-known brand name than SunPower
View on JA Solar
#2

LONGi Hi-MO 7 (440W)

Best technology — HPBC cells with industry-leading degradation

4.6/5

£130–£175/panel

Wattage

440W

Efficiency

22.5%

Cost/Watt

£0.30–£0.40

Technology

HPBC Monocrystalline

Pros

  • HPBC (Hybrid Passivated Back Contact) cell technology
  • Industry-leading low degradation — 88.9% at year 30
  • 22.5% efficiency — marginally best-in-class
  • LONGi is the world's largest solar manufacturer
  • Excellent shade tolerance

Cons

  • Slight price premium over JA Solar
  • HPBC technology is newer with less long-term field data
  • Limited UK installer availability compared to JA Solar
View on LONGi
#3

Canadian Solar HiKu7 (450W)

Best value — highest wattage at the lowest cost per watt

4.5/5

£110–£150/panel

Wattage

450W

Efficiency

22.0%

Cost/Watt

£0.24–£0.33

Technology

N-type TOPCon Monocrystalline

Pros

  • Lowest cost per watt of any premium panel
  • 450W — highest wattage in this comparison
  • Tier 1 bankability — trusted by commercial installers
  • Strong 30-year performance warranty
  • Good availability across UK installer networks

Cons

  • Slightly lower efficiency than JA Solar or LONGi
  • Heavier panel at 22.5 kg
  • Less cutting-edge cell technology than LONGi HPBC
View on Canadian Solar
#4

SunPower Maxeon 7 (430W)

Best premium — highest efficiency, longest warranty, small roofs

4.4/5

£280–£380/panel

Wattage

430W

Efficiency

24.0%

Cost/Watt

£0.65–£0.88

Technology

IBC (Interdigitated Back Contact)

Pros

  • 24.0% efficiency — highest of any residential panel
  • Industry-leading 40-year warranty (product and performance)
  • Smaller panel size — ideal for limited roof space
  • IBC cells with no front busbars — sleek all-black design
  • Best shade performance due to back-contact architecture

Cons

  • Significantly more expensive — nearly 2x the cost per watt
  • Maxeon (spun off from SunPower) has faced financial uncertainty
  • Limited installer network in the UK
  • 40-year warranty only meaningful if manufacturer survives
View on SunPower/Maxeon
#5

Trina Vertex S+ (445W)

Best all-rounder — balanced specs with strong installer support

4.5/5

£115–£155/panel

Wattage

445W

Efficiency

22.3%

Cost/Watt

£0.26–£0.35

Technology

N-type TOPCon Monocrystalline

Pros

  • Strong balance of price, efficiency, and availability
  • Trina is a top-3 global manufacturer with excellent bankability
  • Wide UK installer availability
  • N-type TOPCon with low degradation
  • Lightest panel in this comparison at 21.3 kg

Cons

  • Very similar specs to JA Solar — hard to differentiate
  • Slightly lower efficiency than JA Solar
  • Brand less well-known to UK homeowners than SunPower
View on Trina Solar
#6

Jinko Tiger Neo (440W)

Best budget — lowest cost panel from a Tier 1 manufacturer

4.3/5

£105–£140/panel

Wattage

440W

Efficiency

22.3%

Cost/Watt

£0.24–£0.32

Technology

N-type TOPCon Monocrystalline

Pros

  • Cheapest Tier 1 panel available in the UK
  • Jinko is the world's #1 panel manufacturer by volume
  • N-type TOPCon technology at budget pricing
  • Good 30-year performance warranty
  • Widely available — used in large-scale UK solar farms

Cons

  • Only 12-year product warranty (vs 15 for competitors)
  • Perceived as 'budget' option despite strong technology
  • Customer support primarily through installers
View on Jinko Solar

How to Choose the Right Panels for Your Roof

If you have a large roof

Roof space isn't a constraint — choose on value. Canadian Solar HiKu7 or Jinko Tiger Neo give you the most watts per pound.

Our pick: Canadian Solar HiKu7

If you have a small roof

Maximise output per square metre. SunPower Maxeon 7 at 24% efficiency generates the most power from limited space, though at a premium price.

Our pick: SunPower Maxeon 7

Best all-round choice

JA Solar Deep Blue 4.0 offers the best balance of efficiency (22.4%), price, and availability. It's what most UK installers recommend.

Our pick: JA Solar Deep Blue 4.0

If you're adding a battery

Pair solar panels with a home battery to store excess generation. Any panel works, but higher-wattage panels mean fewer panels and lower installation costs.

See our battery comparison →

Solar Panel System Costs (2026)

Component3kW (7 panels)4kW (9 panels)6kW (14 panels)
Panels£800–£1,100£1,000–£1,400£1,500–£2,200
Inverter£500–£800£600–£1,000£800–£1,200
Mounting & wiring£400–£600£500–£700£700–£1,000
Installation labour£800–£1,200£1,000–£1,400£1,200–£1,800
Scaffolding & DNO£400–£600£400–£600£500–£800
Total installed£3,500–£5,000£5,000–£7,000£7,000–£10,000
Annual generation~2,500 kWh~3,400 kWh~5,100 kWh
Annual savings£500–£700£700–£950£1,000–£1,400

Prices based on UK installer quotes as of Q1 2026. Includes 0% VAT (home solar is VAT-exempt until March 2027). Southern England yields; Scotland ~10% lower.

Pair Your Panels with a Battery

Without a battery, you only use 30–40% of the electricity your panels generate. A 5kWh battery boosts self-consumption to 70–80%, saving an extra £400–£700/year.

Best Home Batteries UK 2026

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Frequently Asked Questions

Frequently Asked Questions

Individual panels cost £105–£380 each depending on brand and technology. A full residential system (10–12 panels, 4–5kW) costs £5,000–£8,000 installed for standard panels, or £9,000–£14,000 for premium SunPower Maxeon panels. VAT is 0% on home solar installations until March 2027.
N-type TOPCon panels (JA Solar, Trina, Jinko) and HPBC panels (LONGi) perform best in UK conditions. They have superior low-light performance compared to older P-type PERC panels, generating more electricity on cloudy days. SunPower's IBC technology also excels in shade.
For 2026, anything above 21% is considered good, above 22% is excellent. Most N-type TOPCon panels now achieve 22-22.5%. SunPower Maxeon 7 leads at 24% but at a significant price premium. Higher efficiency means more power per square metre — important if you have limited roof space.
A typical 3-bed UK home uses 3,000–4,000kWh per year and needs a 3.5–4.5kW system (8–10 panels at 440W each). A larger 4-bed home may need 5–6kW (12–14 panels). If you have an EV, add 1.5–2kW (3–5 panels) to your system size.
Yes, but at reduced output. UK solar panels generate roughly 60% of their annual output between April and September, with December–January being the lowest months. A 4kW system generates approximately 3,400kWh per year in southern England, or 3,000kWh in Scotland.
N-type TOPCon (Tunnel Oxide Passivated Contact) is the latest mainstream solar cell technology, replacing older P-type PERC cells. Benefits include higher efficiency (22%+ vs 20%), lower degradation (0.4% per year vs 0.55%), better shade performance, and lower temperature coefficient. All recommended panels in our comparison use N-type technology.
For most UK homes with adequate roof space, mid-range panels (JA Solar, Trina) offer the best return on investment. Premium SunPower panels only make financial sense if you have very limited roof space and need maximum output per panel. The ROI difference between a £6,000 mid-range system and a £12,000 premium system is rarely justified.
Modern solar panels are warrantied for 25–40 years and are expected to produce electricity for 30–40 years. After 25 years, panels typically still produce 85–90% of their original output. The inverter (which converts DC to AC power) typically lasts 10–15 years and costs £500–£1,000 to replace.

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