First Solar Inc. FS-277

Thin Film
77 W Pmax
93.0 V Voc
1.21 A Isc
70.9 V Vmp
1.09 A Imp
10.73 % eff.
0.6868 FF
116 cells
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IV & PV Curves at STC (1000 W/m², 25 °C)
IV Curves at Multiple Conditions

Irradiance sweep at 25 °C

Temperature sweep at 1000 W/m²

Single-Diode Model Parameters

Source: California Energy Commission module list · retrieved via SAM library · energy.ca.gov · All data sources

Parameter Symbol Value Unit
Nameplate (STC)
STC Power STC 77.281 W
PTC Power PTC 74.6 W
Open-circuit voltage V_oc_ref 93.0 V
Short-circuit current I_sc_ref 1.21 A
Max-power voltage V_mp_ref 70.9 V
Max-power current I_mp_ref 1.09 A
Fill factor FF 0.6868 —
Efficiency (STC) η 10.73 %
Temperature Coefficients
Isc temperature coefficient alpha_sc 0.000576 A/°C
Voc temperature coefficient beta_oc -0.220968 V/°C
Pmax temperature coefficient gamma_r -0.1655 %/°C
NOCT T_NOCT 44.9 °C
Single-Diode (De Soto) Parameters
Modified ideality factor a_ref 2.69554 V
Light-generated current (ref) I_L_ref 1.22557 A
Saturation current (ref) I_o_ref 1.17e-15 A
Series resistance R_s 12.4905 Ω
Shunt resistance (ref) R_sh_ref 970.821 Ω
Cells in series N_s 116 —
CEC Adjust factor Adjust -37.1171 %
Additional Model Sources
Source Model type Fit quality Citation
CEC module list (via SAM library) Default CEC / De Soto single-diode — https://www.energy.ca.gov/media/2367
Sandia PVsyst single-diode fit PVsyst single-diode NMBE Pmp4.4498 Sandia National Laboratories — PVsyst single-diode parameter translation. See data/pvsyst_params.README.md. https://pvpmc.sandia.gov/
Actions
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Module Specifications
Technology Thin Film
Bifacial No
BIPV No
Cells in series 116
Module area 0.72 m²
Dimensions 1.2 × 0.6 m
NOCT 44.9 °C
Temp. coefficient of Pmax -0.166 %/°C
Temp. coefficient of Voc -0.238 %/°C
Temp. coefficient of Isc 0.048 %/°C
CEC list On the 23 Jun 2026 list
Parameters from 16 Nov 2022 list
Annual degradation 0.5%/yr
Measured Data
No measured data yet for this module.
Related Models
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