Solar Panel Comparison
EcoFlow 400W Rigid Solar Panel All Black vs JA Solar Deep Blue 4.0 N-Type Full Black 450W
The Deep Blue 4.0 N-Type Full Black 450W delivers 450W, 50W more than the 400W Rigid Solar Panel All Black at 400W.
400W Rigid Solar Panel All Black has a higher efficiency of 23% versus 22% for the Deep Blue 4.0 N-Type Full Black 450W.
They use different cell technologies: 400W Rigid Solar Panel All Black uses Mono PERC, while Deep Blue 4.0 N-Type Full Black 450W uses N-type TOPCon MBB Half-Cell.
On price, the Deep Blue 4.0 N-Type Full Black 450W is cheaper by £77.50.
Here's how they compare across all key specifications.
Spec
EcoFlow
400W Rigid Solar Panel All Black
400W
23% efficiency
JA Solar
Deep Blue 4.0 N-Type Full Black 450W
450W
22% efficiency
Full Specification Comparison
| Spec | 400W Rigid Solar Panel All Black | Deep Blue 4.0 N-Type Full Black 450W |
|---|---|---|
| Performance | ||
| Power Output | 400 W | 450 W |
| Efficiency | 23% | 22% |
| Cell Type | Mono PERC | N-type TOPCon MBB Half-Cell |
| Temp. Coeff. | -0.3 %/°C | -0.3 %/°C |
| Number of Cells | — | 108 |
| Bifacial | No | Yes |
| Electrical | ||
| Voc | 37.1 V | 39.3 V |
| Vmp | — | 32.82 V |
| Isc | 13.79 A | 14.48 A |
| Imp | — | 13.71 A |
| Max System Voltage | 1000 V | 1500 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1722x1134x35 mm | 1762x1134x30 mm |
| Weight | 21.8 kg | 22 kg |
| Frame Colour | Black | Black |
| Connector Type | EcoFlow Solar Connector | Staubli MC4-EVO2 |
| Junction Box IP | IP68 | IP68 |
| Warranty & Certification | ||
| Product Warranty | 10 | 25 years |
| Power Warranty | No output warranty stated | 30 years linear |
| MCS Certified | No | Yes |
| Certifications | IEC 60529 IP68 | IEC 61215, IEC 61730, ISO 9001, ISO 14001, ISO 45001 |
| Pricing (UK) | ||
| Retail Price | £149.50 | £72.00 |
| Price per Watt | £0.374/W | £0.160/W |
Frequently Asked Questions
Which is more efficient, the 400W Rigid Solar Panel All Black or the Deep Blue 4.0 N-Type Full Black 450W?
The 400W Rigid Solar Panel All Black is more efficient at 23%, compared to 22% for the Deep Blue 4.0 N-Type Full Black 450W. Higher efficiency means more power generated per square metre of roof space.
Which panel produces more power, the 400W Rigid Solar Panel All Black or the Deep Blue 4.0 N-Type Full Black 450W?
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 400W Rigid Solar Panel All Black.
Is the 400W Rigid Solar Panel All Black or Deep Blue 4.0 N-Type Full Black 450W better value for money?
The Deep Blue 4.0 N-Type Full Black 450W is priced lower at £72.00 per panel, saving £77.50 per panel. However, value depends on the full system cost, efficiency, and warranty — use our solar cost calculator to compare total installation costs.
Which solar panel should I choose for my home — the 400W Rigid Solar Panel All Black or the Deep Blue 4.0 N-Type Full Black 450W?
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.
EcoFlow
400W Rigid Solar Panel All Black
400W · 23% efficiency · Mono PERC
View full specs →JA Solar
Deep Blue 4.0 N-Type Full Black 450W
450W · 22% efficiency · N-type TOPCon MBB Half-Cell
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.