Check SP-Series Solar Pack Voltage
In the event of insufficient or unstable battery voltage from an SP-series solar power pack, the output voltage can be measured directly on the UW-6 plug. The pack can be tested both in and out of direct sunlight in order to assess the functionality of the solar panel.
Use a DC Multimeter and measure the potential between Pins 1 (V+) and 3 (GND) of the pack’s UW-6 plug connector.
Healthy operational pack voltages range from 12V to approximately 15.1V, depending on the amount of direct sunlight and the age/health of the installed battery.