REC Solar REC640AA Pro M

Mono-c-Si

640 W Pmax

44.9 V Voc

17.89 A Isc

37.1 V Vmp

17.26 A Imp

23.12 % eff.

0.7972 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	640.346	W
PTC Power	PTC	610.7	W
Open-circuit voltage	V_oc_ref	44.9	V
Short-circuit current	I_sc_ref	17.89	A
Max-power voltage	V_mp_ref	37.1	V
Max-power current	I_mp_ref	17.26	A
Fill factor	FF	0.7972	—
Efficiency (STC)	η	23.12	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.007514	A/°C
Voc temperature coefficient	beta_oc	-0.103719	V/°C
Pmax temperature coefficient	gamma_r	-0.239	%/°C
NOCT	T_NOCT	46.0	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.43333	V
Light-generated current (ref)	I_L_ref	17.89	A
Saturation current (ref)	I_o_ref	4.45e-13	A
Series resistance	R_s	0.17402	Ω
Shunt resistance (ref)	R_sh_ref	849254.655	Ω
Cells in series	N_s	60	—
CEC Adjust factor	Adjust	-13.5547	%

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Module Specifications

Technology Mono-c-Si

Bifacial No

BIPV No

Cells in series 60

Module area 2.77 m²

NOCT 46.0 °C

Temp. coefficient of Pmax -0.239 %/°C

Temp. coefficient of Voc -0.231 %/°C

Temp. coefficient of Isc 0.042 %/°C

CEC list On the 23 Jun 2026 list

Parameters from 23 Jun 2026 list

Measured Data

No measured data yet for this module.

Same Test Data

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