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First Solar

First Solar FS-277 (77.5W)

Residential
74
SCORE /100
30 specs
Score this as…
⭐ General / Balanced📐 Max Efficiency (Tight Roof)🛡️ Durability & Warranty🌡️ Hot-Climate Buyer⚡ High-Output / Commercial-Scale🪶 Easy-Install / Older Roof

Score Breakdown

Build & Install 97
Certifications 84
Temperature & Climate Resilience 83
Efficiency & Real-World Performance 62
Power Output 38
Warranty & Durability 38

DC Electrical Characteristics

STC Power Rating
77.5W
PTC Power Rating
74.6W
STC Power per unit of area
10.0W/ft (107.6W/m)
Peak Efficiency
0.1076
Power Tolerances
-5%/+5%
Number of Cells
116
Imp
1.11A
Vmp
69.9V
Isc
1.22A
Voc
90.5V
NOCT
45°C
Temp. Coefficient of Power
-0.25%/K
Temp. Coefficient of Voltage
-0.226V/K
Series Fuse Rating
2A
Maximum System Voltage
600V

Mechanical Characteristics

Type
Cadmium Telluride
Output Terminal Type
Multicontact Connector Type 3
Frame Color
data not available
Backsheet Color
data not available
Length
47.2in (1,200mm)
Width
23.6in (600mm)
Depth
0.3in (7mm)
Weight
26.5lb (12kg)
Installation Method
Rack-Mounted

Warranty and Certifications

80% Power Output Warranty Period
25yrs
90% Power Output Warranty Period
10yrs
Workmanship Warranty Period
5yrs
UL Fire Classification
data not available
Compliances
UL 1703, IEC 61646, IEC 61730
CSI Listed
Yes