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Brand range: 67.5W–550W
Thin-Film
First Solar FS-6420
Max Power
420W
Efficiency
16.97%
Operating V
180.4V
Warranty
25Y
Technical Specifications
| Open Circuit Voltage (Voc) | 218.5V |
| Short Circuit Current (Isc) | 2.54A |
| Voltage at Pmax (Vmp) | 180.4V |
| Current at Pmax (Imp) | 2.33A |
| Temp. Coefficient of Pmax | -0.245%/°C |
| Dimensions | 2021 x 1225 x 35 mm |
| Weight | 30.9kg |
| NOCT | 48.8°C |
| PTC Rating | 401.4W |
📋 Data verified: June 2026
📄 Specs based on STC (1000 W/m², 25°C, AM 1.5)
🏷️ 218 First Solar models in database
FAQ
How efficient is the First Solar FS-6420?
This panel has 16.97% efficiency, which is standard for commercial solar panels.
What are the dimensions and weight of the First Solar FS-6420?
It measures 2021 x 1225 x 35 mm and weighs 30.9kg.
How does temperature affect the First Solar FS-6420?
With a temp coefficient of -0.245%/°C, it outperforms the industry average of -0.35 to -0.40%/°C.
How long is the warranty for the First Solar FS-6420?
The FS-6420 comes with a 25-year product warranty covering defects and degradation.
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📊 Brand Context
First Solar offers 218 solar panel models from 67.5W to 550W.
Browse all First Solar models →