Trina Solar Panels Review: Are They Good for the UK?
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.
Trina Solar is one of the world's top three solar panel manufacturers and a popular choice among UK installers. Here's our independent review of Trina solar panels, covering the Vertex S+ N-type range, real-world performance in UK conditions, and how they compare to Jinko and JA Solar.
Quick Answer
Trina solar panels are an excellent choice for UK homes. The Vertex S+ N-type range offers 22.5% efficiency — the highest among the top three UK brands — a 25-year product warranty plus 25-year performance warranty, and strong low-light performance. Trina is a Bloomberg Tier 1 manufacturer and the third most popular brand used by MCS-certified installers.
Who Are Trina Solar?
Trina Solar was founded in 1997 and is headquartered in Changzhou, China. They are one of the world's top three solar panel manufacturers, having shipped over 170 GW of panels globally. Trina Solar is listed on the Shanghai Stock Exchange and is a consistent member of the Bloomberg NEF Tier 1 list.
In the UK, Trina solar panels are the third most commonly quoted brand after Jinko and JA Solar. The Vertex S+ N-type range offers slightly higher wattage and efficiency than its main competitors, making it a strong all-rounder.
1997
Founded
170+ GW
Shipped globally
Tier 1
Bloomberg NEF
Top 3
Global manufacturer
Trina Vertex S+: The Panel UK Installers Use
The Vertex S+ is Trina Solar's current flagship residential panel and the model you are most likely to be quoted by a UK installer. It uses N-type TOPCon cell technology — the current industry standard that replaced older P-type PERC panels.
The Vertex S+ is built on Trina's 210mm cell platform with innovative 1/3 cut cell technology (rather than standard half-cut cells). This design reduces resistive losses and improves shade tolerance, giving the Vertex S+ a slight edge in partially shaded conditions.
Standard (440W)
TSM-NEG9R.28 series. 440W output, 22.3% efficiency. Standard residential option with excellent value.
High-Power (445W)
TSM-NEG9R.28 series. 445W with 22.5% efficiency. The most common model installed on UK homes. Same footprint as the 440W.
Commercial (580W+)
Vertex S+ commercial series. 580W+ bifacial panels for commercial and farm installations. Larger format for ground mounts and flat roofs.
Trina Vertex S+ Specifications
These are the key specifications for the Trina Vertex S+ 445W (TSM-NEG9R.28), the most commonly installed Trina panel in the UK.
| Specification | Value |
|---|---|
| Model | TSM-NEG9R.28 / Vertex S+ |
| Wattage | 445W |
| Cell Technology | N-type TOPCon (mono-crystalline) |
| Efficiency | 22.5% |
| Dimensions | 1762 × 1134 × 30mm |
| Weight | 21.8 kg |
| Bifacial | Yes (bifacial gain up to 25%) |
| Temperature Coefficient | −0.29%/°C |
| Product Warranty | 25 years |
| Performance Warranty | 25 years (87.4% output at year 25) |
| Degradation Rate | 0.4% per year (after 1% first year) |
| Cells | 54 cells (1/3 cut cell technology) |
| Cell Size | 210mm (large format) |
| Tier Status | Bloomberg NEF Tier 1 |
Source: Trina Solar Vertex S+ datasheet (TSM-NEG9R.28 series). Specifications may vary by exact model variant.
How Do Trina Solar Panels Perform in the UK?
With approximately 900–1,200 kWh/m² of annual solar irradiance, the UK has more than enough sunlight for solar to work well. Trina panels suit UK conditions for three reasons:
Low-Light Performance
N-type TOPCon cells perform better in diffuse (cloudy) light than older P-type panels. The 1/3 cut cell design further improves shade tolerance.
Higher Wattage
At 445W, the Vertex S+ delivers 5W more per panel than Jinko and JA Solar equivalents. Over 10 panels, that's 50W extra — modest but measurable.
Bifacial Gain
The Vertex S+ is bifacial, capturing reflected light from the rear. Best gains on ground-mounted or flat roof systems with light-coloured surfaces.
A typical UK home with 10 × Trina 445W panels (4.45 kW system) can expect to generate approximately 3,500–4,300 kWh per year, depending on location, orientation, and shading.
Trina Solar vs Jinko Solar: Which Is Better?
This is a common comparison for UK homeowners. Both are Tier 1 N-type TOPCon manufacturers. Here is a head-to-head comparison:
| Feature | Trina Vertex S+ | Jinko Tiger Neo |
|---|---|---|
| Wattage | 445W | 440W |
| Efficiency | 22.5% | 22.3% |
| Cell Technology | N-type TOPCon | N-type TOPCon |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 25 years | 30 years |
| Temperature Coefficient | −0.29%/°C | −0.29%/°C |
| Bifacial | Yes | Yes |
| UK Market Share | #3 | #1 |
| Typical Price (per panel) | £150–£300 | £150–£300 |
Verdict: Trina offers slightly higher efficiency (22.5% vs 22.3%) and wattage (445W vs 440W), but Jinko has a longer performance warranty (30 years vs 25). Both are excellent — the difference is marginal. Choose whichever your installer stocks.
Where Are Trina Solar Panels Made?
Trina Solar manufactures panels primarily in China, with additional facilities in Vietnam and Thailand. Panels installed in the UK are typically manufactured in China or Southeast Asia. All panels must comply with IEC 61215 and IEC 61730 standards and carry MCS certification for the UK market.
Manufacturing Locations
- • China (multiple facilities — main production)
- • Vietnam
- • Thailand
Certifications
- • IEC 61215 (design qualification)
- • IEC 61730 (safety qualification)
- • MCS certified (UK)
- • Bloomberg NEF Tier 1
Trina Solar Warranty: What's Covered?
Trina Solar offers a dual warranty structure:
25-Year Product Warranty
Covers manufacturing defects, including cell degradation beyond normal limits, delamination, junction box failure, and frame defects. Trina will repair or replace defective panels.
25-Year Performance Warranty
Guarantees the panel will produce at least 87.4% of its rated output after 25 years. Note: this is 5 years shorter than Jinko's 30-year performance warranty.
Note: Warranty claims are made through Trina Solar's European office. Your installer should assist with any warranty claim.
Trina Solar Panels: Frequently Asked Questions
Are Trina solar panels good?
Yes. Trina Solar is a Bloomberg Tier 1 manufacturer and one of the world's top three panel makers. The Vertex S+ N-type panels offer 22.5% efficiency — the highest among the top three brands used in the UK — with a 25-year product and performance warranty.
Trina vs Jinko: which is better?
Both are excellent. Trina offers slightly higher efficiency (22.5% vs 22.3%) and wattage (445W vs 440W), but Jinko has a longer performance warranty (30 years vs 25). Pricing is similar at £150–£300 per panel installed. The difference is marginal.
How much do Trina solar panels cost in the UK?
Trina solar panels typically cost £150–£300 per panel as part of a full installation. A 10-panel (4.45 kW) system installed by an MCS-certified installer typically costs £5,500–£8,000. Solar and battery installations benefit from 0% VAT until March 2027.
Where are Trina solar panels made?
Trina Solar manufactures panels in China (main production), Vietnam, and Thailand. Panels sold in the UK comply with IEC standards and carry MCS certification regardless of factory location.
What is the Trina Vertex S+?
The Vertex S+ is Trina Solar's current flagship residential panel using N-type TOPCon cell technology on a 210mm cell platform with 1/3 cut cell technology. The 445W model is the most commonly installed version in the UK.
How long do Trina solar panels last?
Trina solar panels are warranted for 25 years (both product and performance at 87.4% output). In practice, modern N-type panels are expected to last 30–35 years, producing useful electricity well beyond the warranty period.
Is Trina Solar a Tier 1 manufacturer?
Yes. Trina Solar holds Bloomberg NEF Tier 1 bankability status and is one of the world's top three solar panel manufacturers by shipment volume. Major financial institutions will finance projects using Trina panels.
Do Trina panels work well in the UK climate?
Yes. Trina Vertex S+ panels use N-type TOPCon cells with good low-light performance, which is ideal for UK conditions. The temperature coefficient of -0.29%/°C means less output loss on warm summer days. Annual output for a 4.45kW system in the UK is typically 3,800–4,200 kWh.
Trina vs JA Solar: which is better?
Both are excellent Tier 1 options. Trina offers slightly higher wattage (445W vs 440W) and the same 22.4–22.5% efficiency. JA Solar may have better low-light performance. Pricing is very similar. Either is a strong choice — the difference is marginal.
Do I need MCS certification for Trina panels?
Your installer should be MCS-certified. MCS certification is required for Smart Export Guarantee (SEG) eligibility, which pays you for surplus solar electricity exported to the grid. Trina panels themselves are MCS-listed products.
Related Guides
Sources
- Trina Solar — Vertex S+ Datasheet — trinasolar.com
- Bloomberg NEF — Tier 1 Solar Module Maker List — bnef.com
- MCS — Microgeneration Certification Scheme — mcscertified.com
Last updated: April 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.
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