First Solar
FS-6440
TIER 2
Thin-Film
440
Pmax (W)
17.78%
Efficiency
—
Voc
25Y
Warranty
Technical Specifications
| Brand | First Solar |
| Model | FS-6440 |
| Max Power (Pmax) | 440W |
| Efficiency | 17.78% |
| Cell Type | Thin-Film |
Below-Average Efficiency: At 17.78% efficiency, this module prioritises affordability. Efficiency can be offset by lower cost per watt.
📋 Data verified: June 2026
📄 Specs based on STC (1000 W/m², 25°C, AM 1.5)
🏷️ 218 First Solar models in database
FAQ
What are the dimensions and weight of the First Solar FS-6440?
Dimensions vary by configuration.
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).
How efficient is the First Solar FS-6440?
This panel has 17.78% efficiency, which is below-average efficiency for commercial solar panels.
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.