Trina Solar Vertex S+ Series

Trina Solar Vertex S+ Series Review – Advanced N-Type Residential Solar Panels

Trina Solar has long been a leader in solar technology, consistently ranking among the top global manufacturers for both residential and utility-scale panels. With its Vertex series, Trina set new benchmarks for high-power, high-efficiency solar using large-format M10 wafers.

The Vertex S+ Series is Trina’s next-generation residential and small commercial offering, building on the success of the Vertex S by integrating N-type i-TOPCon cells. This upgrade brings higher efficiency, lower degradation, and better temperature performance—making the Vertex S+ one of the most competitive premium residential panels on the market.

In this review, we’ll cover everything you need to know about the Trina Solar Vertex S+ Series:

• Technical specifications and features

• Advantages of N-type TOPCon over PERC

• Pros and cons

• Real-world performance insights

• Customer and installer feedback

• Pricing and availability

• Competitive comparisons with SunPower, REC, Canadian Solar, and Qcells

• FAQs

• Final verdict and recommendations

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Introduction to the Trina Vertex S+ Series

The Vertex S+ Series is designed for residential and small commercial rooftops, where efficiency, reliability, and warranty coverage are critical. Unlike the original Vertex S, which used P-type PERC cells, the Vertex S+ upgrades to N-type TOPCon (Tunnel Oxide Passivated Contact) cells.

This change gives homeowners:

• Higher module efficiencies (over 22%)

• Lower degradation rates (~0.4%/year)

• Better temperature performance in hot climates

• Stronger warranty coverage (up to 30 years in some markets)

The panels are available in both black-frame/white backsheet versions for maximum performance, and all-black versions for premium aesthetics.

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Technical Specifications

Here are the typical specifications for the Trina Solar Vertex S+ Series (values vary slightly by wattage model):

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Key Features of the Vertex S+

1. N-Type TOPCon Technology

Compared to PERC, N-type cells are more efficient, degrade slower, and perform better in heat. The Vertex S+ delivers up to 22.5% efficiency, putting it among the best residential panels available.

2. High Power Density

With up to 450W outputs in residential-sized panels, the S+ delivers more energy per square foot than many mainstream modules.

3. Low Degradation

Thanks to N-type cells, the Vertex S+ degrades at only 0.4% per year, ensuring higher long-term energy yield.

4. Improved Temperature Performance

With a -0.29%/°C coefficient, these panels outperform PERC modules in hot climates.

5. Strong Warranty Coverage

Up to 30 years product and performance warranty, putting it in line with top competitors like REC Alpha and Canadian Solar HiHero.

6. Aesthetic Options

Available in sleek all-black designs for homeowners prioritizing curb appeal.

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Pros and Cons

Pros

• High efficiency (up to 22.5%) with N-type TOPCon cells.

• Low annual degradation (~0.4%).

• Improved temperature performance (-0.29%/°C).

• 25–30 year warranties for long-term peace of mind.

• All-black option for premium aesthetics.

• Competitive pricing compared to SunPower or REC.

• Strong Trina brand reputation for bankability and quality.

Cons

• Not as efficient as SunPower Maxeon (22.8%).

• Pricing above PERC panels, making it less budget-friendly.

• All-black models run hotter, reducing efficiency in very hot climates.

• Availability can vary by market and installer.

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Real-World Performance

In Hot Climates

The Vertex S+ excels with its low -0.29%/°C coefficient, retaining more output than PERC panels under extreme heat.

In Snowy/Cold Regions

Excellent durability and snow load certification make it reliable in cold climates. The black-frame versions help panels shed snow faster under sunlight.

In Coastal Areas

Certified for salt-mist resistance, ensuring reliability in seaside environments.

Shading

The half-cell design improves shading tolerance compared to full-cell modules.

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Customer Feedback

Positive Experiences

• Homeowners love the sleek design of the all-black version.

• Many report higher-than-expected yields, especially in hot climates.

• Buyers appreciate the long warranty coverage.

Concerns

• Some customers mentioned higher upfront costs compared to standard PERC modules.

• Limited availability in some regions slowed project timelines.

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Installer Insights

Installers note that:

• The Vertex S+ installs similarly to Vertex S, making handling familiar.

• Panels are compatible with common residential inverters.

• Long warranties are a major selling point for homeowners.

• Installers sometimes position it as a mid-premium option, between Qcells G10+/Trina Vertex S and ultra-premium REC/SunPower.

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Pricing & Availability

Trina Vertex S+ is priced in the upper mid-range of residential panels:

• Panel-Only Cost: ~$0.55 – $0.70 per watt.

• Installed System Cost: ~$2.60 – $3.25 per watt (U.S. averages).

This makes it cheaper than REC Alpha Pure or SunPower Maxeon, while more expensive than budget panels like JA Solar or Canadian Solar HiKu6.

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Competitive Comparison Table

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FAQs about Trina Vertex S+

1. Is the Vertex S+ better than the Vertex S?
Yes. The S+ uses N-type TOPCon cells, giving it higher efficiency, lower degradation, and longer warranties than the PERC-based Vertex S.

2. How efficient are Vertex S+ panels?
They achieve up to 22.5% efficiency, making them some of the best residential panels available.

3. How long do they last?
With 25–30 year warranties and low degradation, homeowners can expect 30+ years of reliable production.

4. Are they cheaper than REC or SunPower?
Yes. While less expensive than REC Alpha or SunPower Maxeon, the S+ offers similar performance for better value.

5. Who should buy the Vertex S+?
Homeowners who want a premium solar panel with strong efficiency and warranties, but without paying SunPower prices.

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Final Verdict & Recommendation

The Trina Vertex S+ Series is a major step forward for residential solar, bringing N-type TOPCon technology, high efficiency, low degradation, and long warranties into an affordable premium package.

While it doesn’t quite match the extreme longevity of SunPower Maxeon or the boutique style of REC Alpha Pure, the Vertex S+ offers one of the best balances of performance, aesthetics, and cost in today’s market.

Best For:

• Homeowners who want high efficiency at a fair price.

• Roofs with limited space, where power density matters.

• Buyers seeking premium warranties and durability without overspending.

If you’re looking for a panel that combines advanced technology, sleek design, and great long-term value, the Trina Solar Vertex S+ Series is an excellent investment.