Trina Solar Panels Review: Are They Good for Ireland?
Trina Solar is one of the world's top three solar panel manufacturers and a popular choice among Irish installers. Here's our independent review of Trina solar panels, covering the Vertex S+ N-type range, real-world performance in Irish conditions, and how they compare to Jinko and JA Solar.
Quick Answer
Trina solar panels are an excellent choice for Irish homes. The Vertex S+ N-type dual-glass range offers 22.3% efficiency at 445W (up to 23.8% on the newest 475W version), a 25-year product warranty plus 30-year performance warranty, and strong low-light performance. Trina is a Bloomberg Tier 1 manufacturer and widely used by SEAI-registered installers.
Our rating
4.4/5
Matches Jinko and JA Solar on price with slightly higher efficiency and a dual-glass build, so availability through your installer should decide it.
An editorial judgement based on manufacturer datasheets, warranty terms, Irish availability and installed prices, not lab testing. How we rate brands
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 Ireland, Trina solar panels are widely quoted alongside 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 Irish Installers Use
The Vertex S+ is Trina Solar's current flagship residential panel and the model you are most likely to be quoted by an Irish 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, 22.0% efficiency. Standard residential option with excellent value.
High-Power (445W)
TSM-NEG9R.28 series. 445W with 22.3% efficiency. The most common model installed on Irish homes. Same footprint as the 440W.
Commercial (580W+)
Vertex N 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 Ireland.
| Specification | Value |
|---|---|
| Model | TSM-NEG9R.28 / Vertex S+ |
| Wattage | 445W |
| Cell Technology | N-type TOPCon (mono-crystalline) |
| Efficiency | 22.3% |
| Dimensions | 1762 × 1134 × 30mm |
| Weight | 21.0 kg (dual glass) |
| Bifacial | No (dual-glass, monofacial) |
| Temperature Coefficient | −0.29%/°C |
| Product Warranty | 25 years |
| Performance Warranty | 30 years (87.4% output at year 30) |
| Degradation Rate | 0.4% per year (after 1% first year) |
| Cells | 144 cells |
| 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 Ireland?
Two design choices set the Vertex S+ apart on an Irish roof. Its 1/3 cut cells on Trina's 210mm platform reduce resistive losses and improve shade tolerance, which helps where chimneys, dormers or trees shade part of the array. And at 445W it delivers 5W more per panel than the Jinko and JA 440W equivalents, from the same 1762 × 1134mm footprint.
The residential NEG9R.28 is dual-glass but monofacial, so there is no rear-side gain. Ten panels (4.45 kW) can expect roughly 3,900–4,300 kWh a year, depending on orientation and shading.
Trina Solar vs Jinko Solar: Which Is Better?
This is a common comparison for Irish 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 | 22.3% | 22.0% |
| Cell Technology | N-type TOPCon | N-type TOPCon |
| Product Warranty | 25 years | 25 years |
| Performance Warranty | 30 years | 30 years |
| Temperature Coefficient | −0.29%/°C | −0.29%/°C |
| Bifacial | No | No (all-black 440W) |
| Availability in Ireland | Widely stocked | Widely stocked |
| Typical Price (per panel) | €140–€170 | €140–€170 |
Verdict: Trina offers slightly higher efficiency (22.3% vs 22.0%) and wattage (445W vs 440W), and both carry a 25-year product and 30-year performance warranty. 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 Ireland are typically manufactured in China or Southeast Asia. All panels sold in the EU must comply with IEC 61215 and IEC 61730 standards and carry CE marking.
Manufacturing Locations
- • China (multiple facilities — main production)
- • Vietnam
- • Thailand
Certifications
- • IEC 61215 (design qualification)
- • IEC 61730 (safety qualification)
- • CE marking (EU compliance)
- • Meets the IEC standards required for SEAI grant-funded installs (MCS is the UK scheme)
- • 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.
30-Year Performance Warranty
Guarantees the panel will produce at least 87.4% of its rated output after 30 years (1% first-year degradation, then 0.4% a year), the same terms as Jinko.
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 445W offers 22.3% efficiency with a 25-year product warranty and a 30-year performance warranty.
Trina vs Jinko: which is better?
Both are excellent. Trina offers slightly higher efficiency (22.3% vs 22.0%) and wattage (445W vs 440W), and both carry a 25-year product and 30-year performance warranty. Pricing is similar at €140–€170 per panel. The difference is marginal.
How much do Trina solar panels cost in Ireland?
Trina solar panels typically cost €140–€170 per panel as part of a full installation. A 10-panel (4.4 kW) system installed by an SEAI-registered installer typically costs €8,300–€9,000 before the SEAI grant of up to €1,800.
Where are Trina solar panels made?
Trina Solar manufactures panels in China (main production), Vietnam, and Thailand. Panels sold in Ireland comply with EU IEC standards and carry CE marking 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 Ireland.
How long do Trina solar panels last?
The Vertex S+ (NEG9R.28) carries a 25-year product warranty and a 30-year performance warranty guaranteeing 87.4% of rated output at year 30, after 1% loss in the first year and 0.4% a year after that.
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Solar Panel Costs
Full cost breakdown and payback periods.
Sources
- Trina Solar — Vertex S+ Datasheet — trinasolar.com
- Bloomberg NEF — Tier 1 Solar Module Maker List — bnef.com
- SEAI — Solar Energy for the Home — seai.ie
Last updated: October 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the editor of Solar Info and has been covering the Irish solar energy market since 2023. He fact-checks all content against official SEAI data and maintains relationships with SEAI-registered installers across Ireland.
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