First Solar Inc. FS-270

Thin Film
73 W Pmax
89.0 V Voc
1.19 A Isc
67.9 V Vmp
1.07 A Imp
10.09 % eff.
0.686 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 72.653 W
PTC Power PTC 67.2 W
Open-circuit voltage V_oc_ref 89.0 V
Short-circuit current I_sc_ref 1.19 A
Max-power voltage V_mp_ref 67.9 V
Max-power current I_mp_ref 1.07 A
Fill factor FF 0.686 —
Efficiency (STC) η 10.09 %
Temperature Coefficients
Isc temperature coefficient alpha_sc 0.00058 A/°C
Voc temperature coefficient beta_oc -0.224102 V/°C
Pmax temperature coefficient gamma_r -0.1672 %/°C
NOCT T_NOCT 45.9 °C
Single-Diode (De Soto) Parameters
Modified ideality factor a_ref 2.59963 V
Light-generated current (ref) I_L_ref 1.20562 A
Saturation current (ref) I_o_ref 1.5e-15 A
Series resistance R_s 12.0794 Ω
Shunt resistance (ref) R_sh_ref 920.01 Ω
Cells in series N_s 116 —
CEC Adjust factor Adjust -39.2099 %
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 Pmp3.4134 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 45.9 °C
Temp. coefficient of Pmax -0.167 %/°C
Temp. coefficient of Voc -0.252 %/°C
Temp. coefficient of Isc 0.049 %/°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
All First Solar Inc. modules →

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