Solar Panel Comparison

JA Solar Deep Blue 4.0 440W N-Type Bifacial vs Trina Solar Vertex S+ 450W Dual Glass Full Black

The Vertex S+ 450W Dual Glass Full Black delivers 450W, 10W more than the Deep Blue 4.0 440W N-Type Bifacial at 440W.

Both panels share the same 22.5% efficiency rating.

They use different cell technologies: Deep Blue 4.0 440W N-Type Bifacial uses N-type Bycium+ MBB Half-Cell, while Vertex S+ 450W Dual Glass Full Black uses N-type i-TOPCon Triple-Cut.

Here's how they compare across all key specifications.

Vertex S+ 450W Dual Glass Full Black· Higher outputVertex S+ 450W Dual Glass Full Black· Lighter

Spec

JA Solar

Deep Blue 4.0 440W N-Type Bifacial

440W

22.5% efficiency

Trina Solar

Vertex S+ 450W Dual Glass Full Black

450W

22.5% efficiency

Full Specification Comparison

SpecDeep Blue 4.0 440W N-Type BifacialVertex S+ 450W Dual Glass Full Black
Performance
Power Output440 W450 W
Efficiency22.5%22.5%
Cell TypeN-type Bycium+ MBB Half-CellN-type i-TOPCon Triple-Cut
Temp. Coeff.-0.29 %/°C-0.29 %/°C
Number of Cells108144
BifacialYesYes
Electrical
Voc39.38 V52.9 V
Vmp33.37 V44.6 V
Isc13.85 A10.74 A
Imp13.18 A10.09 A
Max System Voltage1500 V1500 V
Operating Temp-40 to +85 °C-40 to +85 °C
Physical
Dimensions1722x1134x30 mm1762x1134x30 mm
Weight21.5 kg21 kg
Frame ColourBlackBlack
Connector TypeMC4-EVO2—
Junction Box IPIP68—
Warranty & Certification
Product Warranty12 years25 years
Power Warranty30 years linear30 years (87.4% yr30, 0.4%/yr)
MCS CertifiedYesYes
CertificationsIEC 61215, IEC 61730IEC 61215, IEC 61730, IEC 62804, IEC TS 63209
Pricing (UK)
Retail Price£53.41—
Price per Watt£0.121/W—

Frequently Asked Questions

Which is more efficient, the Deep Blue 4.0 440W N-Type Bifacial or the Vertex S+ 450W Dual Glass Full Black?

Both the Deep Blue 4.0 440W N-Type Bifacial and Vertex S+ 450W Dual Glass Full Black have the same efficiency rating of 22.5%.

Which panel produces more power, the Deep Blue 4.0 440W N-Type Bifacial or the Vertex S+ 450W Dual Glass Full Black?

The Vertex S+ 450W Dual Glass Full Black has a higher rated output at 450W. This means fewer panels would be needed to reach the same system size compared to the Deep Blue 4.0 440W N-Type Bifacial.

Which solar panel should I choose for my home — the Deep Blue 4.0 440W N-Type Bifacial or the Vertex S+ 450W Dual Glass Full Black?

The right choice depends on your priorities. If maximising energy generation per panel is key, consider efficiency and wattage. If budget is your main concern, compare price per watt. Both panels have their merits — use our Solar Estimator to see how each would perform in your specific home setup.

JA Solar

Deep Blue 4.0 440W N-Type Bifacial

440W · 22.5% efficiency · N-type Bycium+ MBB Half-Cell

View full specs →

Trina Solar

Vertex S+ 450W Dual Glass Full Black

450W · 22.5% efficiency · N-type i-TOPCon Triple-Cut

View full specs →

More Comparisons

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See how these panels perform in your home

Use our Solar Estimator to calculate system size, installation cost, and payback period — with either of these panels as a starting point.

Solar EstimatorEstimate Installation Cost