Suntech Power STP320-24/Vem

Multi-c-Si

320 W Pmax

45.6 V Voc

9.14 A Isc

37.1 V Vmp

8.63 A Imp

16.5 % eff.

0.7682 FF

72 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	320.173	W
PTC Power	PTC	292.9	W
Open-circuit voltage	V_oc_ref	45.6	V
Short-circuit current	I_sc_ref	9.14	A
Max-power voltage	V_mp_ref	37.1	V
Max-power current	I_mp_ref	8.63	A
Fill factor	FF	0.7682	—
Efficiency (STC)	η	16.5	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.005329	A/°C
Voc temperature coefficient	beta_oc	-0.150754	V/°C
Pmax temperature coefficient	gamma_r	-0.4294	%/°C
NOCT	T_NOCT	44.2	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.87402	V
Light-generated current (ref)	I_L_ref	9.14325	A
Saturation current (ref)	I_o_ref	2.46e-10	A
Series resistance	R_s	0.34233	Ω
Shunt resistance (ref)	R_sh_ref	964.048	Ω
Cells in series	N_s	72	—
CEC Adjust factor	Adjust	6.8066	%

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 Pmp-0.1049	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 Multi-c-Si

Bifacial No

BIPV No

Cells in series 72

Module area 1.94 m²

Dimensions 1.956 × 0.992 m

NOCT 44.2 °C

Temp. coefficient of Pmax -0.429 %/°C

Temp. coefficient of Voc -0.331 %/°C

Temp. coefficient of Isc 0.058 %/°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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