Solar Panel Comparison
Perlight Solar Black Grid 500W All-Black TOPCon Single Glass vs Perlight Solar Delta 425W Total Black Mono PERC
The Black Grid 500W All-Black TOPCon Single Glass delivers 500W, 75W more than the Delta 425W Total Black Mono PERC at 425W.
Black Grid 500W All-Black TOPCon Single Glass has a higher efficiency of 26% versus 21.4% for the Delta 425W Total Black Mono PERC.
They use different cell technologies: Black Grid 500W All-Black TOPCon Single Glass uses N-type TOPCon, while Delta 425W Total Black Mono PERC uses Mono PERC.
On price, the Delta 425W Total Black Mono PERC is cheaper by £808.61.
Here's how they compare across all key specifications.
Spec
Perlight Solar
Black Grid 500W All-Black TOPCon Single Glass
500W
26% efficiency
Perlight Solar
Delta 425W Total Black Mono PERC
425W
21.4% efficiency
Full Specification Comparison
| Spec | Black Grid 500W All-Black TOPCon Single Glass | Delta 425W Total Black Mono PERC |
|---|---|---|
| Performance | ||
| Power Output | 500 W | 425 W |
| Efficiency | 26% | 21.4% |
| Cell Type | N-type TOPCon | Mono PERC |
| Temp. Coeff. | -0.3 %/°C | -0.35 %/°C |
| Number of Cells | 120 | 108 |
| Bifacial | No | No |
| Electrical | ||
| Voc | 42 V | — |
| Vmp | 35.91 V | — |
| Isc | 11.55 A | — |
| Imp | 10.66 A | — |
| Max System Voltage | 1500 V | 1500 V |
| Operating Temp | -40 to +85 °C | -40 to +85 °C |
| Physical | ||
| Dimensions | 1908x1134x30 mm | 1812x1096x30 mm |
| Weight | — | 20.8 kg |
| Frame Colour | Black | Black |
| Connector Type | MC4 | MC4 |
| Warranty & Certification | ||
| Product Warranty | 30 | 30 |
| Power Warranty | 30 years (87.4% at yr30) | 30 years linear (2% yr1, 0.55%/yr) |
| MCS Certified | No | Yes |
| Certifications | IEC 61215, IEC 61730, IEC 61701, IEC 62716 | IEC 61215, IEC 61730 |
| Pricing (UK) | ||
| Retail Price | £895.00 | £86.39 |
| Price per Watt | £1.790/W | £0.203/W |
Frequently Asked Questions
Which is more efficient, the Black Grid 500W All-Black TOPCon Single Glass or the Delta 425W Total Black Mono PERC?
The Black Grid 500W All-Black TOPCon Single Glass is more efficient at 26%, 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 Black Grid 500W All-Black TOPCon Single Glass or the Delta 425W Total Black Mono PERC?
The Black Grid 500W All-Black TOPCon Single Glass has a higher rated output at 500W. This means fewer panels would be needed to reach the same system size compared to the Delta 425W Total Black Mono PERC.
Is the Black Grid 500W All-Black TOPCon Single Glass or Delta 425W Total Black Mono PERC better value for money?
The Delta 425W Total Black Mono PERC is priced lower at £86.39 per panel, saving £808.61 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 Black Grid 500W All-Black TOPCon Single Glass or the Delta 425W Total Black Mono PERC?
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
Black Grid 500W All-Black TOPCon Single Glass
500W · 26% efficiency · N-type TOPCon
View full specs →Perlight Solar
Delta 425W Total Black Mono PERC
425W · 21.4% efficiency · Mono PERC
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.