Solar Panel Comparison
JA Solar Deep Blue 4.0 440W N-Type Bifacial vs Maxeon / SunPower Maxeon 7 475W
The Maxeon 7 475W delivers 475W, 35W more than the Deep Blue 4.0 440W N-Type Bifacial at 440W.
Maxeon 7 475W has a higher efficiency of 24% versus 22.5% for the Deep Blue 4.0 440W N-Type Bifacial.
They use different cell technologies: Deep Blue 4.0 440W N-Type Bifacial uses N-type Bycium+ MBB Half-Cell, while Maxeon 7 475W uses IBC (Interdigitated Back Contact) N-type.
Here's how they compare across all key specifications.
Spec
JA Solar
Deep Blue 4.0 440W N-Type Bifacial
440W
22.5% efficiency
Maxeon / SunPower
Maxeon 7 475W
475W
24% efficiency
Full Specification Comparison
| Spec | Deep Blue 4.0 440W N-Type Bifacial | Maxeon 7 475W |
|---|---|---|
| Performance | ||
| Power Output | 440 W | 475 W |
| Efficiency | 22.5% | 24% |
| Cell Type | N-type Bycium+ MBB Half-Cell | IBC (Interdigitated Back Contact) N-type |
| Temp. Coeff. | -0.29 %/°C | -0.27 %/°C |
| Number of Cells | 108 | 120 |
| Bifacial | Yes | No |
| Electrical | ||
| Voc | 39.38 V | 44.47 V |
| Vmp | 33.37 V | 38.06 V |
| Isc | 13.85 A | 13.2 A |
| Imp | 13.18 A | 12.48 A |
| Max System Voltage | 1500 V | 1000 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1722x1134x30 mm | 1913x1035x35 mm |
| Weight | 21.5 kg | 21.1 kg |
| Frame Colour | Black | Black |
| Connector Type | MC4-EVO2 | MC4 compatible |
| Junction Box IP | IP68 | — |
| Warranty & Certification | ||
| Product Warranty | 12 years | 40 years |
| Power Warranty | 30 years linear | 40 years (92% yr25, 0.25%/yr) |
| MCS Certified | Yes | No |
| Certifications | IEC 61215, IEC 61730 | IEC 61215, IEC 61730 |
| 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 Maxeon 7 475W?
The Maxeon 7 475W is more efficient at 24%, compared to 22.5% for the Deep Blue 4.0 440W N-Type Bifacial. Higher efficiency means more power generated per square metre of roof space.
Which panel produces more power, the Deep Blue 4.0 440W N-Type Bifacial or the Maxeon 7 475W?
The Maxeon 7 475W has a higher rated output at 475W. 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 Maxeon 7 475W?
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 →Maxeon / SunPower
Maxeon 7 475W
475W · 24% efficiency · IBC (Interdigitated Back Contact) N-type
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.