Wuxi Suntech Power Co. Ltd STP285S-20/Wfb

Mono-c-Si

285 W Pmax

38.4 V Voc

9.47 A Isc

31.7 V Vmp

9.0 A Imp

17.61 % eff.

0.7845 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	285.3	W
PTC Power	PTC	259.4	W
Open-circuit voltage	V_oc_ref	38.4	V
Short-circuit current	I_sc_ref	9.47	A
Max-power voltage	V_mp_ref	31.7	V
Max-power current	I_mp_ref	9.0	A
Fill factor	FF	0.7845	—
Efficiency (STC)	η	17.61	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.00536	A/°C
Voc temperature coefficient	beta_oc	-0.126989	V/°C
Pmax temperature coefficient	gamma_r	-0.4466	%/°C
NOCT	T_NOCT	45.0	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.61809	V
Light-generated current (ref)	I_L_ref	9.56981	A
Saturation current (ref)	I_o_ref	4.68e-10	A
Series resistance	R_s	0.2099	Ω
Shunt resistance (ref)	R_sh_ref	393.245	Ω
Cells in series	N_s	60	—
CEC Adjust factor	Adjust	12.0834	%

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-0.5178	Sandia National Laboratories — PVsyst single-diode parameter translation. See data/pvsyst_params.README.md. https://pvpmc.sandia.gov/

Actions

Open in PV Explorer Generate PAN File Datasheet not on file CEC Source Data

Module Specifications

Technology Mono-c-Si

Bifacial No

BIPV No

Cells in series 60

Module area 1.62 m²

NOCT 45.0 °C

Temp. coefficient of Pmax -0.447 %/°C

Temp. coefficient of Voc -0.331 %/°C

Temp. coefficient of Isc 0.057 %/°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.

Same Test Data

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

Similar Modules

Other manufacturers, same technology and cell count, power within 3 %.