Solair World

Can a Solar Panel Have Voltage but No Current?

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5 kilowatts (5000 watts) are the typical size of a residential solar energy system in the US. This suffices to meet the requirements of the majority of households. But what occurs if solar panels fail to function?

While measuring the voltage and current of your setup, your digital display may inform you that your solar panel has voltage but no amps. So, what happened after you finished installing your newly bought solar power system? This is the result of either human error, solar panels issue or charge controllers.

Without current, a solar panel’s voltage is useless, and vice versa. In this article, we’ll walk you through the steps of diagnosing the issue with your solar power system configuration, pinpointing the root of the issue, and then fixing the issue to get your system back up and running quickly.

Why Do Solar Panels Produce Voltage but No Current?

This impaired voltage and current issue in solar panels are easy to diagnose. Making a diagnosis is a crucial first step in repairing a solar panel with voltage but no amps. A proper diagnosis will enable you to determine which of the numerous causes of this issue is the one that requires a solution.

Check the voltage evaluations of your solar panel as a starting point. Understanding the mechanisms by which your system malfunctions and providing zero amps will help to avoid future problems.

Existing Circuit Configuration Error?

We need to comprehend how current flows to detect this major problem. Usually in a sound circuit, electrical current flows from big to small voltage. Open circuits happen when your circuit is insufficient because you did not configure it correctly.

As a result, your digital display will show that your solar panel has electricity but no amps. This implies that current cannot continue to flow through the circuit as this route has affirmed if the load current is higher compared to your solar panel’s voltage.

There are several causes, including defective equipment, broken charge controllers, reversed final connections, shading of solar panels, etc. Using a higher load voltage compared to the panel voltage is another way for an open circuit to occur.  Ensure that you have a good circuit to resolve this.

Zero Amps from Wrong Measurement?

Maybe everything about the circuit and equipment is okay but you have been measuring it incorrectly the whole time! If you may accidentally set your multimeter to AC or another setting rather than DC amp, you will have no amp by default.

Another issue is messing up the electrical wiring in the multimeter by improperly connecting it to panels while using a broken multimeter. To measure current, some people connect multiple multimeters in parallel. Avoid doing this as it can blow your fuse instantly, in addition to receiving zero amps.

Can Internal Solar Panel Issues Create Zero Current Error?

Zero amps can occasionally be caused by internal issues with solar panels. Your solar panels might not connect at all or only connect partially if their connectors are loose. This may result in voltage in the panels but zero current flow. The mechanism inside the junction box that becomes loose can lead to such issues.

Distorted panels can lead the panel preventing the circuit from carrying current and causing your amp meter to read zero. Cracks in your solar panel can remain unnoticed because they appear to be invisible to the unaided eye.

Does Charge Controller Affect Current Flow?

Solar Charge Controller is one of the most important pieces of technology in your solar panel. Your circuit may be destructed if it is damaged. And the worst-case scenario is that the current flow will halt.

Therefore, despite voltage, there will be no amps. If you’re dealing with zero-current solar panels, troubleshooting the panel charger is a crucial first step. An open circuit will result if this particular piece of equipment malfunctions, breaking your circuit as well.

Avoid using cheap, low-quality solar charge controllers. This Regulator occasionally needs to be replaced after becoming damaged. The charge controller may experience several issues such as the moon error sign, display freezing, and no power, which can also lead to issues like zero amps.

How to Repair a Solar Panel with Voltage but No Amps?

Now we can categorize the causes into 3 main groups: open or flawed circuits, issues with solar panels and charge controllers, and incorrect measurement techniques. Each of these issues has solutions with additional advice and safeguards to take.

After testing your solar panel, you now wonder how you got into the zero amps situation and how to get out of it. Let’s examine the various remedies for internal issues.

  • Open circuit repair:Make sure your solar panel receives enough sunlight and the system’s wiring is done properly with the clean terminals. Take preventative measures toward things that could hurt your system to stop physical damage.
  • Fixing internal solar panel:Firstly, loosen the plug’s back gland using a screw. Pull the MC4 connector, if it comes out, it is probably loose. So, push it in until a click is heard. Verify that the connector is completely seated and adjust the errant gland.
  • Repair charge controller error:The solar panel’s failure to charge the battery can easily be fixed with a quick restart. The charge controller will restart once you press the soft reset button. Simultaneously press the power and reset buttons, with 4 buttons on the others. Try a hard reset if it’s not working.

For accurate measurement using the voltage method, join your multimeter and your load in parallel. There is a good chance that you have blown the circuit breaker in your multimeter if you set it in another direction by accident while assessing amps. If so, you need to swap out the fuse.


We’ll go over some common issues a solar panel might run into. It will produce less current the more shade it is exposed to. Temperature, faulty panels, and poor connections are additional factors that result in low output.

Most of the time, it does not imply that your solar panels are completely inoperable. By correctly identifying the problem and applying the suggested information, you should be able to solve this issue. In some cases, this issue might still be present, in such cases get in touch with experts!