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Brand range: 67.5W–550W
Thin-Film
First Solar FS-390
Max Power
90W
Efficiency
12.5%
Operating V
49.2V
Warranty
25Y
Technical Specifications
| Open Circuit Voltage (Voc) | 61V |
| Short Circuit Current (Isc) | 2.04A |
| Voltage at Pmax (Vmp) | 49.2V |
| Current at Pmax (Imp) | 1.83A |
| Temp. Coefficient of Pmax | -0.183%/°C |
| Dimensions | 1200 x 600 x 35 mm |
| Weight | 9.0kg |
| NOCT | 48.4°C |
| PTC Rating | 87.1W |
📋 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-390?
This panel has 12.5% efficiency, which is standard for commercial solar panels.
What is the max power output of the First Solar FS-390?
The First Solar FS-390 is rated at 90W under STC (1000 W/m², 25°C, AM 1.5).
What are the dimensions and weight of the First Solar FS-390?
It measures 1200 x 600 x 35 mm and weighs 9.0kg.
How long is the warranty for the First Solar FS-390?
The FS-390 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 →