Specialty Concepts SC2 - Manual (Page 16)

SOLAR PANEL PROBLEMS :
- Refer to this section to help diagnose potential
problems based on panel performance.
CASE PANELS SEE NOTE(S)
1
→
Less charge than expected See Panel note 1
Panel Note 1 - The panels should generate a charge close to their rated load current as
presented in their specifications. To reach this level assumes that all conditions are ideal. If
the panel performance as measured at the panel inputs on the SC3/30 controller is much
lower, consider the following potential problems.
••
Solar Panels Problem - Panels may be dirty, not aligned or other problem. TEST: Monitor
the "ARRAY CURRENT" reading before and after cleaning of the solar panels and
orientation. Locate panel where no shadows will cross it.
••
Bad Connection to the Solar Panel. TEST: Measure the voltage up at the solar panel, and
then down at the battery itself during a sunny period of maximum charging. These voltage
readings should not be more than 1 to 1.5 volts different. More than that would indicate a
bad connection or other voltage drop in the system. Suspect crimp connections that have
not been soldered.
••
Solar Panels may be defective - TEST: Disconnect the array by switching the array circuit
breaker off, and measure the solar array voltage between the array(+) and the array(-). In
sunny conditions, this should be 18-24 volts (in a 12 volt system). A lower value could
indicate problems with the solar panel.