Solar Panel Comparison

JA Solar Deep Blue 4.0 N-Type Full Black 450W vs TCL Solar T-Class 440W TOPCon Half-Cut All Black

The Deep Blue 4.0 N-Type Full Black 450W delivers 450W, 10W more than the T-Class 440W TOPCon Half-Cut All Black at 440W.

Both panels share the same 22% efficiency rating.

They use different cell technologies: Deep Blue 4.0 N-Type Full Black 450W uses N-type TOPCon MBB Half-Cell, while T-Class 440W TOPCon Half-Cut All Black uses N-type TOPCon Half-Cut SMB.

Here's how they compare across all key specifications.

Deep Blue 4.0 N-Type Full Black 450W· Higher output

Spec

JA Solar

Deep Blue 4.0 N-Type Full Black 450W

450W

22% efficiency

TCL Solar

T-Class 440W TOPCon Half-Cut All Black

440W

22% efficiency

Full Specification Comparison

SpecDeep Blue 4.0 N-Type Full Black 450WT-Class 440W TOPCon Half-Cut All Black
Performance
Power Output450 W440 W
Efficiency22%22%
Cell TypeN-type TOPCon MBB Half-CellN-type TOPCon Half-Cut SMB
Temp. Coeff.-0.3 %/°C-0.3 %/°C
Number of Cells108108
BifacialYesNo
Electrical
Voc39.3 V—
Vmp32.82 V—
Isc14.48 A—
Imp13.71 A—
Max System Voltage1500 V1500 V
Operating Temp-40 to +85 °C-40 to +85 °C
Physical
Dimensions1762x1134x30 mm1762x1134x30 mm
Weight22 kg—
Frame ColourBlackBlack
Connector TypeStaubli MC4-EVO2MC4
Junction Box IPIP68—
Warranty & Certification
Product Warranty25 years25
Power Warranty30 years linear30 years linear
MCS CertifiedYesYes
CertificationsIEC 61215, IEC 61730, ISO 9001, ISO 14001, ISO 45001IEC 61215, IEC 61730
Pricing (UK)
Retail Price£72.00—
Price per Watt£0.160/W—

Frequently Asked Questions

Which is more efficient, the Deep Blue 4.0 N-Type Full Black 450W or the T-Class 440W TOPCon Half-Cut All Black?

Both the Deep Blue 4.0 N-Type Full Black 450W and T-Class 440W TOPCon Half-Cut All Black have the same efficiency rating of 22%.

Which panel produces more power, the Deep Blue 4.0 N-Type Full Black 450W or the T-Class 440W TOPCon Half-Cut All Black?

The Deep Blue 4.0 N-Type Full Black 450W has a higher rated output at 450W. This means fewer panels would be needed to reach the same system size compared to the T-Class 440W TOPCon Half-Cut All Black.

Which solar panel should I choose for my home — the Deep Blue 4.0 N-Type Full Black 450W or the T-Class 440W TOPCon Half-Cut All 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 N-Type Full Black 450W

450W · 22% efficiency · N-type TOPCon MBB Half-Cell

View full specs →

TCL Solar

T-Class 440W TOPCon Half-Cut All Black

440W · 22% efficiency · N-type TOPCon Half-Cut SMB

View full specs →

More Comparisons

T-Class 440W TOPCon Half-Cut All Black vs HiKu6 440W Mono PERCT-Class 440W TOPCon Half-Cut All Black vs Deep Blue 3.0 Light 410WT-Class 440W TOPCon Half-Cut All Black vs Maxeon 7 475WT-Class 440W TOPCon Half-Cut All Black vs Alpha Pure-R 430WT-Class 440W TOPCon Half-Cut All Black vs Ultra V Pro Mini 445W All BlackT-Class 440W TOPCon Half-Cut All Black vs Maxeon 6 DC 440W

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