Solar Panel Comparison
Perlight Solar Delta 425W Total Black Mono PERC vs REC Group Alpha Pure-R 430W
The Alpha Pure-R 430W delivers 430W, 5W more than the Delta 425W Total Black Mono PERC at 425W.
Alpha Pure-R 430W has a higher efficiency of 22.3% versus 21.4% for the Delta 425W Total Black Mono PERC.
They use different cell technologies: Delta 425W Total Black Mono PERC uses Mono PERC, while Alpha Pure-R 430W uses HJT (Heterojunction).
On price, the Delta 425W Total Black Mono PERC is cheaper by £55.61.
Here's how they compare across all key specifications.
Spec
Perlight Solar
Delta 425W Total Black Mono PERC
425W
21.4% efficiency
REC Group
Alpha Pure-R 430W
430W
22.3% efficiency
Full Specification Comparison
| Spec | Delta 425W Total Black Mono PERC | Alpha Pure-R 430W |
|---|---|---|
| Performance | ||
| Power Output | 425 W | 430 W |
| Efficiency | 21.4% | 22.3% |
| Cell Type | Mono PERC | HJT (Heterojunction) |
| Temp. Coeff. | -0.35 %/°C | -0.24 %/°C |
| Number of Cells | 108 | 80 |
| Bifacial | No | No |
| Electrical | ||
| Voc | — | 59.4 V |
| Vmp | — | 50 V |
| Isc | — | 8.91 A |
| Imp | — | 8.4 A |
| Max System Voltage | 1500 V | 1000 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1812x1096x30 mm | 1730x1118x30 mm |
| Weight | 20.8 kg | 21.5 kg |
| Frame Colour | Black | Black |
| Connector Type | MC4 | MC4 |
| Warranty & Certification | ||
| Product Warranty | 30 | 20 years |
| Power Warranty | 30 years linear (2% yr1, 0.55%/yr) | 25 years (92% min, 0.25%/yr) |
| MCS Certified | Yes | Yes |
| Certifications | IEC 61215, IEC 61730 | IEC 61215, IEC 61730, RoHS |
| Pricing (UK) | ||
| Retail Price | £86.39 | £142.00 |
| Price per Watt | £0.203/W | £0.330/W |
Frequently Asked Questions
Which is more efficient, the Delta 425W Total Black Mono PERC or the Alpha Pure-R 430W?
The Alpha Pure-R 430W is more efficient at 22.3%, compared to 21.4% for the Delta 425W Total Black Mono PERC. Higher efficiency means more power generated per square metre of roof space.
Which panel produces more power, the Delta 425W Total Black Mono PERC or the Alpha Pure-R 430W?
The Alpha Pure-R 430W has a higher rated output at 430W. This means fewer panels would be needed to reach the same system size compared to the Delta 425W Total Black Mono PERC.
Is the Delta 425W Total Black Mono PERC or Alpha Pure-R 430W better value for money?
The Delta 425W Total Black Mono PERC is priced lower at £86.39 per panel, saving £55.61 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 Delta 425W Total Black Mono PERC or the Alpha Pure-R 430W?
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.
Perlight Solar
Delta 425W Total Black Mono PERC
425W · 21.4% efficiency · Mono PERC
View full specs →REC Group
Alpha Pure-R 430W
430W · 22.3% efficiency · HJT (Heterojunction)
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.