What stops a solar battery from charging?

An inability to charge a solar battery might be caused by simple wear and tear. Sulfation, which happens when the solar battery is unable to reach a full charge for an extended period of time, is one of the most prevalent issues with lead acid batteries. Solar battery charging problems

How can you tell whether a solar panel is replenishing a battery?

To check if your solar panel is charging, follow these three easy steps:

You should first gauge the solar panel's own voltage.

The voltage at the point where the solar panel is linked to the battery should then be measured.

Next, while the wires are still disconnected, you can check the voltage of the battery itself.