There are many reasons why solar panels do not charge batteries, but here are some possible reasons:
Damaged connection
The cable or connector connecting the solar panel to the battery may be damaged or loose, causing the electricity to be transmitted to the battery.
Inverter failure
An inverter is a device that converts the solar energy into usable power. If the inverter fails or is damaged, it is unable to convert the solar energy into the direct current needed for charging.
Charge and discharge controller problem
If there is a charge and discharge controller in the system, the controller may fail or set up errors, leading to the failure to properly manage the solar charging process.
Lack of sunlight
If the solar panels do not get enough sunlight, they can’t generate enough electricity to charge the batteries.
Dirt or shielding
If the surface of the solar panel is covered with dust, leaves and other shielding objects, it will affect the absorption of light and reduce electricity generation.
Low temperature effects
At extreme low temperatures, the performance of solar panels can be affected, resulting in poor functioning.
Other faults
Failure of other components such as fuses and relays may also cause the solar panels to charge the battery.
To solve this problem, it is necessary to gradually check the above possible causes, and find out the specific fault point for repair. If you eliminate the difficulties, please consult a professional for assistance.