9.2.9. Battery supply issue
For the solar charger to be fully operational as a battery charger, it needs to be connected to a battery.
Although it might look like the solar charger is connected to the battery, it is very well possible that the controller is not receiving
the battery supply, there is no voltage at the battery terminals of the solar charger.
Possible causes can be:
• Loose or missing battery cables.
• Loose cable connections, or badly crimped cable terminals.
• A blown (or missing) fuse in the battery supply cable.
• Open (or faulty) circuit breaker in the battery supply cable.
• Missing or incorrectly wired battery cables.
Battery voltage check
1. Use the VictronConnect app, a connected display or a GX device to find out what the battery terminal voltage of the controller
is. If this is unavailable use a multi meter to measure the battery voltage at the terminals of the controller.
V
OR
2. Use a multi meter to measure the voltage at the battery terminals.
V
3. Compare the two voltages.
4. If the battery voltage and the controller voltage are not the same, then investigate why this is. Follow the path from the
controller to the battery to investigate what could be the cause.
Battery supply check
1. Check and verify that all cabling is connected correctly, and that no wiring mistakes have been made.
2. Check if all cable connections are tight while taking maximum torque levels into consideration.
3. Check if all cable lugs or cable terminals have been crimped correctly.
4. Check fuses and/or circuit breakers.
If a blown fuse is found, first ensure that the battery polarity has been correctly wired before replacing the
fuse. See next paragraph for more information on reverse battery polarity.
9.2.10. PV voltage too high
The PV voltage should never exceed the maximum rated PV voltage of the solar charger. The maximum PV voltage rating is
printed on the front or on the side of the housing of the controller, and in the product specification sheets.
MPPT solar charger manual
Page 50 Troubleshooting and Support
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