Venus Energy Limited VE-645-66IIMK

Mono-c-Si

645 W Pmax

45.46 V Voc

17.87 A Isc

37.89 V Vmp

17.03 A Imp

20.68 % eff.

0.7943 FF

66 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	645.267	W
PTC Power	PTC	605.1	W
Open-circuit voltage	V_oc_ref	45.46	V
Short-circuit current	I_sc_ref	17.87	A
Max-power voltage	V_mp_ref	37.89	V
Max-power current	I_mp_ref	17.03	A
Fill factor	FF	0.7943	—
Efficiency (STC)	η	20.68	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.005397	A/°C
Voc temperature coefficient	beta_oc	-0.116787	V/°C
Pmax temperature coefficient	gamma_r	-0.3587	%/°C
NOCT	T_NOCT	43.1	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.67326	V
Light-generated current (ref)	I_L_ref	17.8726	A
Saturation current (ref)	I_o_ref	2.83e-11	A
Series resistance	R_s	0.13964	Ω
Shunt resistance (ref)	R_sh_ref	960.62	Ω
Cells in series	N_s	66	—
CEC Adjust factor	Adjust	9.8854	%

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 Pmp0.0036	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 66

Module area 3.12 m²

NOCT 43.1 °C

Temp. coefficient of Pmax -0.359 %/°C

Temp. coefficient of Voc -0.257 %/°C

Temp. coefficient of Isc 0.030 %/°C

CEC list On the 23 Jun 2026 list

Parameters from 23 Jun 2026 list

Measured Data

No measured data yet for this module.

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