Tangshan Haitai New Energy Technology Co. Ltd. HTM645DMH8-66(1500)

Mono-c-Si

645 W Pmax

44.75 V Voc

18.04 A Isc

37.68 V Vmp

17.12 A Imp

20.74 % eff.

0.7991 FF

66 cells

Same test data as HTM645MH8-66(1500). CEC lists each frame, color and backsheet version as its own listing.

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	645.082	W
PTC Power	PTC	601.3	W
Open-circuit voltage	V_oc_ref	44.75	V
Short-circuit current	I_sc_ref	18.04	A
Max-power voltage	V_mp_ref	37.68	V
Max-power current	I_mp_ref	17.12	A
Fill factor	FF	0.7991	—
Efficiency (STC)	η	20.74	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.006855	A/°C
Voc temperature coefficient	beta_oc	-0.110085	V/°C
Pmax temperature coefficient	gamma_r	-0.345	%/°C
NOCT	T_NOCT	45.6	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.64202	V
Light-generated current (ref)	I_L_ref	18.04756	A
Saturation current (ref)	I_o_ref	2.61e-11	A
Series resistance	R_s	0.11257	Ω
Shunt resistance (ref)	R_sh_ref	268.714	Ω
Cells in series	N_s	66	—
CEC Adjust factor	Adjust	13.8622	%

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 Pmp0.0156	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 3.11 m²

NOCT 45.6 °C

Temp. coefficient of Pmax -0.345 %/°C

Temp. coefficient of Voc -0.246 %/°C

Temp. coefficient of Isc 0.038 %/°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

2 listings with identical nameplate test data, one per frame, color or backsheet version.

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