Trina Solar TSM-645DEG21C.20

Mono-c-Si Bifacial

646 W Pmax

45.3 V Voc

18.31 A Isc

37.5 V Vmp

17.23 A Imp

20.98 % eff.

0.779 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	646.125	W
PTC Power	PTC	608.7	W
Open-circuit voltage	V_oc_ref	45.3	V
Short-circuit current	I_sc_ref	18.31	A
Max-power voltage	V_mp_ref	37.5	V
Max-power current	I_mp_ref	17.23	A
Fill factor	FF	0.779	—
Efficiency (STC)	η	20.98	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.006225	A/°C
Voc temperature coefficient	beta_oc	-0.104643	V/°C
Pmax temperature coefficient	gamma_r	-0.303	%/°C
NOCT	T_NOCT	44.6	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	1.56737	V
Light-generated current (ref)	I_L_ref	18.3355	A
Saturation current (ref)	I_o_ref	5.04e-12	A
Series resistance	R_s	0.16579	Ω
Shunt resistance (ref)	R_sh_ref	118.995	Ω
Cells in series	N_s	66	—
CEC Adjust factor	Adjust	6.0216	%

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-0.1987	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 3.08 m²

NOCT 44.6 °C

Temp. coefficient of Pmax -0.303 %/°C

Temp. coefficient of Voc -0.231 %/°C

Temp. coefficient of Isc 0.034 %/°C

CEC list On the 23 Jun 2026 list

Parameters from 16 Nov 2022 list

Annual degradation 0.55%/yr

Measured Data

No measured data yet for this module.

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