First Solar Inc. FS-6425-P-B-2

Thin Film

425 W Pmax

224.827 V Voc

2.656 A Isc

175.439 V Vmp

2.422 A Imp

16.86 % eff.

0.7116 FF

268 cells

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	424.913	W
PTC Power	PTC	403.3	W
Open-circuit voltage	V_oc_ref	224.827	V
Short-circuit current	I_sc_ref	2.656	A
Max-power voltage	V_mp_ref	175.439	V
Max-power current	I_mp_ref	2.422	A
Fill factor	FF	0.7116	—
Efficiency (STC)	η	16.86	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.000871	A/°C
Voc temperature coefficient	beta_oc	-0.508559	V/°C
Pmax temperature coefficient	gamma_r	-0.2292	%/°C
NOCT	T_NOCT	46.8	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	7.28566	V
Light-generated current (ref)	I_L_ref	2.67647	A
Saturation current (ref)	I_o_ref	9.99e-14	A
Series resistance	R_s	11.06973	Ω
Shunt resistance (ref)	R_sh_ref	1436.243	Ω
Cells in series	N_s	268	—
CEC Adjust factor	Adjust	-8.1802	%

Actions

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Module Specifications

Technology Thin Film

Bifacial No

BIPV No

Cells in series 268

Module area 2.52 m²

NOCT 46.8 °C

Temp. coefficient of Pmax -0.229 %/°C

Temp. coefficient of Voc -0.226 %/°C

Temp. coefficient of Isc 0.033 %/°C

CEC list On the 23 Jun 2026 list

Parameters from 23 Jun 2026 list

Measured Data

No measured data yet for this module.

Same Test Data

2 listings with identical nameplate test data, one per frame, color or backsheet version.

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