Solar Panel Comparison
JA Solar Deep Blue 3.0 420W PERC vs JA Solar DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr
The DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr delivers 430W, 10W more than the Deep Blue 3.0 420W PERC at 420W.
DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr has a higher efficiency of 21.6% versus 21% for the Deep Blue 3.0 420W PERC.
They use different cell technologies: Deep Blue 3.0 420W PERC uses Mono PERC MBB Half-Cell, while DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr uses N-type TOPCon GFI (Gapless) Bifacial Half-Cut.
Here's how they compare across all key specifications.
Spec
JA Solar
Deep Blue 3.0 420W PERC
420W
21% efficiency
JA Solar
DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr
430W
21.6% efficiency
Full Specification Comparison
| Spec | Deep Blue 3.0 420W PERC | DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr |
|---|---|---|
| Performance | ||
| Power Output | 420 W | 430 W |
| Efficiency | 21% | 21.6% |
| Cell Type | Mono PERC MBB Half-Cell | N-type TOPCon GFI (Gapless) Bifacial Half-Cut |
| Temp. Coeff. | — | -0.29 %/°C |
| Number of Cells | 108 | 108 |
| Bifacial | No | Yes |
| Electrical | ||
| Voc | — | 39.68 V |
| Vmp | 37.73 V | 33.53 V |
| Isc | — | 13.74 A |
| Imp | — | 12.83 A |
| Max System Voltage | 1000 V | 1500 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1762x1134x30 mm | 1722x1134x30 mm |
| Weight | 20 kg | 21 kg |
| Frame Colour | Black | Black |
| Connector Type | MC4 | MC4-EVO2 |
| Junction Box IP | — | IP68 |
| Warranty & Certification | ||
| Product Warranty | 12 years | 25 |
| Power Warranty | 25 years linear | 30 years linear (0.4%/yr) |
| MCS Certified | Yes | Yes |
| Certifications | IEC 61215, IEC 61730 | IEC 61215, IEC 61730, UL 61215, UL 61730, ISO 9001, ISO 14001 |
| Pricing (UK) | ||
| Retail Price | £57.81 | — |
| Price per Watt | £0.138/W | — |
Frequently Asked Questions
Which is more efficient, the Deep Blue 3.0 420W PERC or the DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr?
The DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr is more efficient at 21.6%, compared to 21% for the Deep Blue 3.0 420W PERC. Higher efficiency means more power generated per square metre of roof space.
Which panel produces more power, the Deep Blue 3.0 420W PERC or the DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr?
The DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr has a higher rated output at 430W. This means fewer panels would be needed to reach the same system size compared to the Deep Blue 3.0 420W PERC.
Which solar panel should I choose for my home — the Deep Blue 3.0 420W PERC or the DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr?
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 3.0 420W PERC
420W · 21% efficiency · Mono PERC MBB Half-Cell
View full specs →JA Solar
DeepBlue 4.0 GB 430W N-Type TOPCon GFI Bifacial Dual Glass 25yr
430W · 21.6% efficiency · N-type TOPCon GFI (Gapless) Bifacial Half-Cut
View full specs →More Comparisons
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.