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Brand range: 67.5W–550W
Thin-Film
First Solar FS-6440
Max Power
440W
Efficiency
17.78%
Operating V
184.7V
Warranty
25Y
Technical Specifications
| Open Circuit Voltage (Voc) | 220V |
| Short Circuit Current (Isc) | 2.55A |
| Voltage at Pmax (Vmp) | 184.7V |
| Current at Pmax (Imp) | 2.38A |
| Temp. Coefficient of Pmax | -0.245%/°C |
| Dimensions | 2021 x 1225 x 35 mm |
| Weight | 30.9kg |
| NOCT | 48.8°C |
| PTC Rating | 420.5W |
📋 Data verified: June 2026
📄 Specs based on STC (1000 W/m², 25°C, AM 1.5)
🏷️ 218 First Solar models in database
FAQ
How long is the warranty for the First Solar FS-6440?
The FS-6440 comes with a 25-year product warranty covering defects and degradation.
How does temperature affect the First Solar FS-6440?
With a temp coefficient of -0.245%/°C, it outperforms the industry average of -0.35 to -0.40%/°C.
What are the dimensions and weight of the First Solar FS-6440?
It measures 2021 x 1225 x 35 mm and weighs 30.9kg.
What is the max power output of the First Solar FS-6440?
The First Solar FS-6440 is rated at 440W under STC (1000 W/m², 25°C, AM 1.5).
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📊 Brand Context
First Solar offers 218 solar panel models from 67.5W to 550W.
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