I am reading over a solar panel data sheet and I'm having issue converting the Temperature coefficient of Voc as written because it seems exceedingly low to me. I fully understand the panel datasheet might be misleading as well but wanted to ensure my understand of the data provided was correct.
As I understand it most panels should have a temperature coefficient of VOC (open-circuit voltage) of -0.2 to -0.5 closer to absolute 0 being better.
The panel I am reading up on lists the temperature coefficient of VOC as -(80±10)mV/°C which if I am not mistaken means -0.09/°C to -0.07V/°C. Am I reading the data correctly?
The following is the specifications of the panel incase I am missing some aspect. Thank you for your time.
Maximum power (Pmax) 100W
Voltage at Pmax (Vmp) 19.00V
Current at Pmax (Imp) 5.27A
Open-circuit voltage (Voc) 23.50V
Short-circuit current (Isc) 5.67A
Temperature coefficient of Voc -(80±10)mV/°C
Temperature coefficient of Isc (0.065±0.015)%/ °C
Temperature coefficient of power -(0.5±0.05)%/ °C
NOCT (Air 20°C; Sun 0.8kW/m² wind 1m/s) 47±2°C
Operating temperature -40°C to 85°C
Maximum system voltage 1000V DC
Power tolerance ± 3%