Solar Panel Comparison
JA Solar Deep Blue 3.0 420W PERC vs Maxeon / SunPower Maxeon 7 475W
The Maxeon 7 475W delivers 475W, 55W more than the Deep Blue 3.0 420W PERC at 420W.
Maxeon 7 475W has a higher efficiency of 24% 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 Maxeon 7 475W uses IBC (Interdigitated Back Contact) N-type.
Here's how they compare across all key specifications.
Spec
JA Solar
Deep Blue 3.0 420W PERC
420W
21% efficiency
Maxeon / SunPower
Maxeon 7 475W
475W
24% efficiency
Full Specification Comparison
| Spec | Deep Blue 3.0 420W PERC | Maxeon 7 475W |
|---|---|---|
| Performance | ||
| Power Output | 420 W | 475 W |
| Efficiency | 21% | 24% |
| Cell Type | Mono PERC MBB Half-Cell | IBC (Interdigitated Back Contact) N-type |
| Temp. Coeff. | — | -0.27 %/°C |
| Number of Cells | 108 | 120 |
| Bifacial | No | No |
| Electrical | ||
| Voc | — | 44.47 V |
| Vmp | 37.73 V | 38.06 V |
| Isc | — | 13.2 A |
| Imp | — | 12.48 A |
| Max System Voltage | 1000 V | 1000 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1762x1134x30 mm | 1913x1035x35 mm |
| Weight | 20 kg | 21.1 kg |
| Frame Colour | Black | Black |
| Connector Type | MC4 | MC4 compatible |
| Warranty & Certification | ||
| Product Warranty | 12 years | 40 years |
| Power Warranty | 25 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 | £57.81 | — |
| Price per Watt | £0.138/W | — |
Frequently Asked Questions
Which is more efficient, the Deep Blue 3.0 420W PERC or the Maxeon 7 475W?
The Maxeon 7 475W is more efficient at 24%, 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 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 3.0 420W PERC.
Which solar panel should I choose for my home — the Deep Blue 3.0 420W PERC 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 3.0 420W PERC
420W · 21% efficiency · Mono PERC 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.