Wuxi Suntech Power Co. Ltd STP345S-A21/Wfhb

Mono-c-Si

345 W Pmax

42.7 V Voc

10.08 A Isc

36.4 V Vmp

9.48 A Imp

19.95 % eff.

0.8017 FF

60 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	345.072	W
PTC Power	PTC	321.7	W
Open-circuit voltage	V_oc_ref	42.7	V
Short-circuit current	I_sc_ref	10.08	A
Max-power voltage	V_mp_ref	36.4	V
Max-power current	I_mp_ref	9.48	A
Fill factor	FF	0.8017	—
Efficiency (STC)	η	19.95	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.005443	A/°C
Voc temperature coefficient	beta_oc	-0.114009	V/°C
Pmax temperature coefficient	gamma_r	-0.341	%/°C
NOCT	T_NOCT	45.5	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.61537	V
Light-generated current (ref)	I_L_ref	10.0862	A
Saturation current (ref)	I_o_ref	3.27e-11	A
Series resistance	R_s	0.12948	Ω
Shunt resistance (ref)	R_sh_ref	210.84	Ω
Cells in series	N_s	60	—
CEC Adjust factor	Adjust	11.7776	%

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 Pmp0.0194	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 Mono-c-Si

Bifacial No

BIPV No

Cells in series 60

Module area 1.73 m²

NOCT 45.5 °C

Temp. coefficient of Pmax -0.341 %/°C

Temp. coefficient of Voc -0.267 %/°C

Temp. coefficient of Isc 0.054 %/°C

CEC list On the 23 Jun 2026 list

Parameters from 16 Nov 2022 list

Annual degradation 0.55%/yr

Measured Data

No measured data yet for this module.

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