6
PV Temperature Sensors
This sensor is designed to attach directly to any solar panel. When
placed on the center back side of the panel, it accurately measures
the temperature of the panel.
Prior to installation of the PV temperature sensor onto the PV panel,
the installation area of the panel back should be thoroughly cleaned.
This cleaning will ensure a good bond between sensor and panel
and allow for accurate panel temperature readings.
After cleaning, peel off the protective adhesive tape on the
temperature sensor and stick it onto the back of the panel. Firmly
press the sensor into place. Refer to the picture on the right. The
cable should be secured within 8 inches of the temperature-sensing
element.
Run the cable back to the weather station unit and connect to the PV
temperature sensor terminals.
If the cable length is insufficient for the installation, additional cable
can be added to the existing cable. If this is done, an accuracy
derating factor must be added to the overall temperature accuracy
of this sensor. For every 100ft of cable added, an accuracy derating
factor of -0.125°C must be taken into account.
Cabling Requirements to Management System
The maximum cable distance between weather station and the SunSpec-compliant management
system is 1000 m (3000 ft).
High-voltage areas of power plants are “electrically noisy” environments so shielded cable is advised
for connection from the weather station to RS485. If outdoor exposure or proximity to a noise source
is a concern, Beldon 1120A or equivalent cabling should be used.
Cables to external sensors are supplied with the sensor.
