![]() ![]() It’s uncommon for a solar panel to fail as they’re meant to last 25 years in the field. If your system was professionally wired, chances are that you may not experience this problem, but it is worth checking for. You can use a multi-meter to check the voltage levels at various points to find out the point beyond which the problem of low voltage begins. If the modules are not overheated, the best bet for you will be to check for a bad connection. Also, make sure that there’s sufficient air circulation beneath the panels and that this open space is not blocked in any way. Adding more modules in series, and therefore increasing the string voltage, will eliminate this problem. The higher the temperature, the lower will be the power output. ![]() It has been scientifically proven that the voltage drop rises with the rise in temperature. If shading is not an issue, most likely it will be the higher than normal operating temperature of the solar panels. Conducting a bi-annual survey of the installation site is a good idea. Keep in mind that a solar systems lasts for more than 25 years and trees grow over time. Ensure that there are no trees around and that the solar panels are not blocked by shadow at any time during the day. This is possibly the most common cause of low voltage. The factors that could contribute to a low power problem are: Shading This is the most common type of problem and a few, quick, troubleshooting steps will help you find the source of the problem. If your solar system is not delivering sufficient power for which it is rated for, the resulting situation is called a low power situation. As the pv modules are connected in series, one failing pv module will shut down the entire system. It’s also possible that one solar panel in your pv array failed. Zero output is a common problem and in nine out of ten cases, it is due to a faulty inverter or charge controller. These two conditions which may require troubleshooting are: There are two failure modes which the solar system maybe experience. Two common problems that require troubleshootingĪs mentioned above, most of the problems are caused by the inverter and charge controller. However nearly every pv manufacturer has seen defects in solar panels over the past years, and I’ll also describe common quality issues that might shut down a pv module. For that reason, it’s most likely that a problem is caused by a defect in system components other than the panels, such as the solar inverter, charge controller, wiring or batteries. Quality solar panels are built and guaranteed to produce power for 25 years. Troubleshooting a solar (pv) systemīelow I will describe basic steps in troubleshooting a PV array. Common issues are zero power and low voltage output. This article describes how you can troubleshoot a solar system in basic steps. ![]()
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