S SOLARSPECS
First Solar is the largest American solar panel manufacturer and the only major producer of thin-film CdTe modules. Designed for distributed generation projects, the First Solar FS-6440A-P-B-2 combines 440W power output with 17.46% efficiency in a Thin-Film form factor.
🏭View all 218 First Solar models→ Brand range: 67.5W–550W
Thin-Film

First Solar FS-6440A-P-B-2

Max Power
440W
Efficiency
17.46%
Operating V
178.5V
Warranty
25Y
First Solar FS-6440A-P-B-2 logo
Technical Specifications
Open Circuit Voltage (Voc)226.8V
Short Circuit Current (Isc)2.68A
Voltage at Pmax (Vmp)178.5V
Current at Pmax (Imp)2.46A
Temp. Coefficient of Pmax-0.229%/°C
Dimensions2039 x 1236 x 35 mm
Weight31.5kg
NOCT46.99°C
PTC Rating423.3W
📋 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-6440A-P-B-2?

This panel has 17.46% efficiency, which is standard for commercial solar panels.

How does temperature affect the First Solar FS-6440A-P-B-2?

With a temp coefficient of -0.229%/°C, it outperforms the industry average of -0.35 to -0.40%/°C.

What is the max power output of the First Solar FS-6440A-P-B-2?

The First Solar FS-6440A-P-B-2 is rated at 440W under STC (1000 W/m², 25°C, AM 1.5).

How long is the warranty for the First Solar FS-6440A-P-B-2?

The FS-6440A-P-B-2 comes with a 25-year product warranty covering defects and degradation.

Compare This Panel

Add this First Solar FS-6440A-P-B-2 to compare specs side-by-side with other commercial solar panels.

📄 Download

Save this datasheet as PDF for offline reference.

Share

Advertisement
📊 Brand Context

First Solar offers 218 solar panel models from 67.5W to 550W.

Browse all First Solar models →
⚡ 0 to Compare