Topsun Co. Ltd. TOP CLASS 670CH12

Mono-c-Si Bifacial

670 W Pmax

46.29 V Voc

18.52 A Isc

38.48 V Vmp

17.42 A Imp

22.12 % eff.

0.7819 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	670.322	W
PTC Power	PTC	622.5	W
Open-circuit voltage	V_oc_ref	46.29	V
Short-circuit current	I_sc_ref	18.52	A
Max-power voltage	V_mp_ref	38.48	V
Max-power current	I_mp_ref	17.42	A
Fill factor	FF	0.7819	—
Efficiency (STC)	η	22.12	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.00926	A/°C
Voc temperature coefficient	beta_oc	-0.134704	V/°C
Pmax temperature coefficient	gamma_r	-0.386	%/°C
NOCT	T_NOCT	44.8	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.81021	V
Light-generated current (ref)	I_L_ref	18.53519	A
Saturation current (ref)	I_o_ref	1.43e-10	A
Series resistance	R_s	0.13087	Ω
Shunt resistance (ref)	R_sh_ref	159.568	Ω
Cells in series	N_s	66	—
CEC Adjust factor	Adjust	9.9546	%

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-0.3136	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 Yes

BIPV No

Cells in series 66

Module area 3.03 m²

NOCT 44.8 °C

Temp. coefficient of Pmax -0.386 %/°C

Temp. coefficient of Voc -0.291 %/°C

Temp. coefficient of Isc 0.050 %/°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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