Solar Panel Comparison
JA Solar Deep Blue 3.0 420W PERC vs JA Solar DeepBlue 4.0 Pro 580W Bifacial
The DeepBlue 4.0 Pro 580W Bifacial delivers 580W, 160W more than the Deep Blue 3.0 420W PERC at 420W.
DeepBlue 4.0 Pro 580W Bifacial has a higher efficiency of 22.5% 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 Pro 580W Bifacial uses N-type TOPCon 182mm.
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 Pro 580W Bifacial
580W
22.5% efficiency
Full Specification Comparison
| Spec | Deep Blue 3.0 420W PERC | DeepBlue 4.0 Pro 580W Bifacial |
|---|---|---|
| Performance | ||
| Power Output | 420 W | 580 W |
| Efficiency | 21% | 22.5% |
| Cell Type | Mono PERC MBB Half-Cell | N-type TOPCon 182mm |
| Temp. Coeff. | — | -0.3 %/°C |
| Number of Cells | 108 | 144 |
| Bifacial | No | Yes |
| Electrical | ||
| Voc | — | 51.3 V |
| Vmp | 37.73 V | 43.03 V |
| Isc | — | 14.36 A |
| Imp | — | 13.48 A |
| Max System Voltage | 1000 V | 1500 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1762x1134x30 mm | 2278x1134x30 mm |
| Weight | 20 kg | 31.8 kg |
| Frame Colour | Black | Silver |
| Connector Type | MC4 | MC4 |
| Junction Box IP | — | IP68 |
| Warranty & Certification | ||
| Product Warranty | 12 years | 12 years |
| Power Warranty | 25 years linear | 30 years linear (0.4%/yr) |
| MCS Certified | Yes | Yes |
| Certifications | IEC 61215, IEC 61730 | IEC 61215, IEC 61730, IEC 61701, IEC 62716, CE, TUV SUD, TUV NORD |
| 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 Pro 580W Bifacial?
The DeepBlue 4.0 Pro 580W Bifacial is more efficient at 22.5%, 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 Pro 580W Bifacial?
The DeepBlue 4.0 Pro 580W Bifacial has a higher rated output at 580W. 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 Pro 580W Bifacial?
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 Pro 580W Bifacial
580W · 22.5% efficiency · N-type TOPCon 182mm
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.