KOSOL ENERGIE PVT. LTD. KE640N

Mono-c-Si

641 W Pmax

57.3 V Voc

13.85 A Isc

48.5 V Vmp

13.21 A Imp

23.13 % eff.

0.8073 FF

78 cells

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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	640.685	W
PTC Power	PTC	609.1	W
Open-circuit voltage	V_oc_ref	57.3	V
Short-circuit current	I_sc_ref	13.85	A
Max-power voltage	V_mp_ref	48.5	V
Max-power current	I_mp_ref	13.21	A
Fill factor	FF	0.8073	—
Efficiency (STC)	η	23.13	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.006094	A/°C
Voc temperature coefficient	beta_oc	-0.128925	V/°C
Pmax temperature coefficient	gamma_r	-0.293	%/°C
NOCT	T_NOCT	43.1	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.98062	V
Light-generated current (ref)	I_L_ref	13.854	A
Saturation current (ref)	I_o_ref	3.75e-12	A
Series resistance	R_s	0.18753	Ω
Shunt resistance (ref)	R_sh_ref	648.96	Ω
Cells in series	N_s	26	—
CEC Adjust factor	Adjust	8.5286	%

The CEC list gives 26 cells in series, which puts 2.20 V on each cell. A silicon cell gives 0.55 to 0.80 V, so PV Ivy uses 78 cells in series for the .PAN file and Similar Modules, found from the CEC count times 3 (it counts one bypass substring).

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Module Specifications

Technology Mono-c-Si

Bifacial No

BIPV No

Cells in series 78 (inferred, CEC lists 26)

Module area 2.77 m²

NOCT 43.1 °C

Temp. coefficient of Pmax -0.293 %/°C

Temp. coefficient of Voc -0.225 %/°C

Temp. coefficient of Isc 0.044 %/°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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