SunPower SPR-X20-255

Mono-c-Si

255 W Pmax

51.0 V Voc

6.3 A Isc

42.8 V Vmp

5.95 A Imp

20.47 % eff.

0.7926 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	254.66	W
PTC Power	PTC	241.4	W
Open-circuit voltage	V_oc_ref	51.0	V
Short-circuit current	I_sc_ref	6.3	A
Max-power voltage	V_mp_ref	42.8	V
Max-power current	I_mp_ref	5.95	A
Fill factor	FF	0.7926	—
Efficiency (STC)	η	20.47	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.00252	A/°C
Voc temperature coefficient	beta_oc	-0.1224	V/°C
Pmax temperature coefficient	gamma_r	-0.3	%/°C
NOCT	T_NOCT	43.6	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.78245	V
Light-generated current (ref)	I_L_ref	6.30571	A
Saturation current (ref)	I_o_ref	2.32e-12	A
Series resistance	R_s	0.42778	Ω
Shunt resistance (ref)	R_sh_ref	472.248	Ω
Cells in series	N_s	72	—
CEC Adjust factor	Adjust	4.4117	%

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-0.2701	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 72

Module area 1.244 m²

Dimensions 1.559 × 0.798 m

NOCT 43.6 °C

Temp. coefficient of Pmax -0.300 %/°C

Temp. coefficient of Voc -0.240 %/°C

Temp. coefficient of Isc 0.040 %/°C

CEC list Not on the 23 Jun 2026 list

Last listed 16 Nov 2022

Parameters from 16 Nov 2022 list

Annual degradation 0.25%/yr

Measured Data

No measured data yet for this module.

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