ET SOLAR POWER HONGKONG LIMITED ET-N778TBH660GB

Mono-c-Si

660 W Pmax

57.69 V Voc

14.03 A Isc

49.37 V Vmp

13.37 A Imp

23.57 % eff.

0.8155 FF

78 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	660.077	W
PTC Power	PTC	627.4	W
Open-circuit voltage	V_oc_ref	57.69	V
Short-circuit current	I_sc_ref	14.03	A
Max-power voltage	V_mp_ref	49.37	V
Max-power current	I_mp_ref	13.37	A
Fill factor	FF	0.8155	—
Efficiency (STC)	η	23.57	%
Temperature Coefficients
Isc temperature coefficient	alpha_sc	0.006131	A/°C
Voc temperature coefficient	beta_oc	-0.127322	V/°C
Pmax temperature coefficient	gamma_r	-0.2974	%/°C
NOCT	T_NOCT	43.4	°C
Single-Diode (De Soto) Parameters
Modified ideality factor	a_ref	2.0127	V
Light-generated current (ref)	I_L_ref	14.03387	A
Saturation current (ref)	I_o_ref	4.96e-12	A
Series resistance	R_s	0.13924	Ω
Shunt resistance (ref)	R_sh_ref	505.102	Ω
Cells in series	N_s	78	—
CEC Adjust factor	Adjust	13.1207	%

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Module Specifications

Technology Mono-c-Si

Bifacial No

BIPV No

Cells in series 78

Module area 2.8 m²

NOCT 43.4 °C

Temp. coefficient of Pmax -0.297 %/°C

Temp. coefficient of Voc -0.221 %/°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.

Same Test Data

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

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