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TROUBLESHOOTING GUIDE
Troubleshooting Guide
Please note:
• Solar panels and controller are maintenance free.
• There are no user service parts in this unit.
• If you have any problems, please contact Thunder. See back of booklet for
details.
The charge LED doesn’t glow green
• Ensure the panels are exposed to sunlight.
• Ensure all panel cables are free from damage and are connected correctly.
• Ensure the cables from the controller to the battery are free from damage
and connected correctly.
• Check the battery voltage. If the battery voltage is less than 8V, the
controller will not work.
• Check the fuse. The fuse will typically be blown for the following reasons:
- Battery poles +/- are reversed or a short circuit occurred.
- Solar controller output current over 10A.
• Inspect and test the battery. Check if the battery is in good condition.
There is no voltage output from the panel
• Check if the output cables are connected to the battery correctly.
• The panel is fitted with a SMART controller that will not allow any output if
the panel is not connected. This protects the solar panel.
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