Imagine buying newsolar lights for your flower garden only or not lighting up after installation. The frustration and lack of knowledge about solar lights might lead you to spend more money trying to fix a problem you don't know. In this article, we will help you diagnose and fix your solar lights issue. One of the main. Apart from defective solar lights equipment, the solar panel might be the issue when your solar battery is not charging. However, you. One way of testing Is your battery charger is not working is by using a multimeter. Connect the battery to the solar panel when the sun is hot and. You can do a hard reset on your battery by; Step 1: Start by taking off the controller from the wall. Step 2: Disconnect the four wires behind the controller. Step 3: Next, disconnect both the battery positive and the panel negative. Step. As said before, all batteries deteriorate from the first time you start using them. Once the battery is drained enough, it stops being effective. A solar panel can therefore not charge a dead battery.