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Solar Panel has Voltage but No Amps

By Benjamin Strusnik April 13, 2022

Solar Panel has Voltage but No Amps

So you finished setting up your newly-purchased solar power system only for your digital display to tell you that your solar panel has voltage but no amps when you try to measure the voltage and current (amps) of your setup? 

Have no fear, for this is a fairly common solar panel problem and can usually be attributed either to human error or a problem with your solar panel or charge controllers themselves.

Fortunately for you, Shop Solar Kits specializes in all things solar power and we’ll employ our expertise to help you to resolve any worrying issues like this. 

In this article, we’ll guide you through the process of diagnosing this problem with your solar power system setup, identifying the cause of the problem, and finally, remedying the problem to ensure that your system is up and running again in no time.

Diagnosing the Cause of the Problem

Diagnosing this problem is fairly simple. That being said, diagnosis is an essential step in the process of fixing a solar panel that has voltage but no amps. 

This is because a correct diagnosis will help you identify which of the number of causes of this problem is the cause that you will have to remedy. 

As a point of departure, you’ll need to check the standard voltage and current ratings of your solar panel. 

solar panels has voltage but no amps

This will ensure that you know what to compare the readings of your voltmeter (which measures the volts the solar panel is putting out) and multimeter (which measures the amps that your solar panel is putting out) to. 

Next, you’ll need to set up your solar panels in a place that receives optimum sunlight to ensure that you get the best and clearest readings possible for this experiment. 

If you’ve completed these first two steps and your digital display tells you that your solar panel has voltage but no amps there are several things that could have gone wrong. So let’s take a look at these causes.  

Open Circuits

Open circuits occur where you have not configured your circuit properly and, as a result, your circuit is incomplete. This means that your current is unable to flow through our circuit, hence your digital display will tell you that your solar panel has voltage but no amps. 

Current always flows from a low voltage to a high voltage. 

With this in mind, it should be clear that if your load voltage (the voltage of the equipment your panel is connected to) is higher than your solar panel’s voltage, then your current will have nowhere to flow as this path has been reversed. 

In other words, if the voltage of your battery (the load) is higher than that of your solar panel, then your solar charge controller will not allow the current to flow from your solar panel back to your battery to charge it because the circuit is open. 

Thus, your display will indicate that your solar panel has voltage but no amps. 

There are other factors that may cause this problem which we’ll look at below.

Errors on Your Solar Charge Controller

Troubleshooting your solar panel charge controller is an important step if you’re facing a currentless solar panel. 

The solar charge controller is a piece of equipment that’s integrated into your solar power system that regulates the voltage and current of your system to prevent your batteries from overcharging. This is why if your charge controller isn’t working properly it will damage your battery. 

When Solar Panel has Voltage but No Amps

If this piece of equipment malfunctions and is broken, it will in turn break your circuit as well leading to an open circuit. This means that once again, no current will flow through your circuit. 

This is a problem that’s common in solar charge controllers that are cheap and of poor quality

Internal Problems of Your Solar Panel

There are three types of internal problems that your solar panel might have that could prevent your circuit from carrying current and thus reading no amps. These include:

Loose Connectors

This is the most common internal problem in this regard. 

If the connecting cables of your solar panel are partially connected, or not even connected at all, there will be a breach in your circuit and so, no current will be able to flow through your circuit.

A Loose Junction Boxes

A junction box is the component of your solar panel that accommodates the linking up of all the electrical wires of your solar panel, where their currents merge into one stream to be passed on to your battery. 

Sometimes in the shipping or even installation process, one of the wires connected in your junction box, or even the junction box itself, could be dislodged which will also break your circuit. 

If such a breach of circuit occurs, the current will be unable to flow through your circuit and so, once again, your solar panel has voltage but no amps.

Cracked Panels

Sometimes, cracks on your solar panel are seemingly invisible to the naked eye and as a result, they will be left unnoticed and unattended. Weather conditions or mishandling your solar panel may play a role in your solar panel degradation factor

What if Solar Panel has Voltage but No Amps

This may be problematic as even the smallest of cracks on the surface of your solar panel may allow water to seep into the interior of your solar panels, blowing its circuits and ultimately breaking the flow of current from your solar panel to your battery.

Incorrect Measurement Methods

This is a classic example of human error. Sometimes, despite the fact that your solar panels are connected properly and your solar power system is in perfect working condition, you’ll still find that your solar panel has voltage but no amps. 

The root of this problem is simply that you’ve been measuring your current and voltage the wrong way. For example, if you have set your multimeter only to measure the voltage of your solar power system, then obviously it will only give you a voltage reading and no current reading.

Remedies

Having addressed the number of factors that may cause your solar power system to give you a voltage reading but not current reading, let’s take a look at the various ways to fix these problems. 

Close the Circuit

Closing an open circuit can be both simple and complicated. Sometimes it could only require you to analyze your wiring and make sure that everything in your circuit is connected properly. 

However, sometimes the issues with your wiring may be more complicated in which case we recommend sending your solar power system to professionals to resolve the problem. 

Never hesitate to contact us here at Shop Solar Kits for assistance with these problems. Be it guidance or simple referrals to experts in the field, we’ll be happy to offer our assistance in resolving this problem.

Resolve the Solar Charge Controller Error

Here you’ll find that the remedy is as simple as resetting your solar charge controller so that it reboots to its default settings. 

Never underestimate the power of a reboot. Sometimes you may have accidentally hit a button that initializes a different setting to the setting you require. 

solar panels has voltage and no amps

However, if this problem persists even after a number of reboots, it could be that your solar charge controller is broken. 

Unfortunately, resolving this problem will cost you money as you’ll probably need to send your solar charge controller in for maintenance or even replace your current one with a new and better quality one.

Fix Your Solar Panel’s Internal Problem

As we mentioned earlier, there are three types of internal problems with your solar panels that will lead to a zero amp reading on your digital display. Let’s take a look at the different solutions to these individual internal problems.

Loose Connectors

This problem can be resolved fairly simply by ensuring that all your connector cables are connected properly. We recommend disconnecting all of them first and then reconnecting them all one by one, ensuring a solid connection.

A Loose Junction Boxes

The solution to this problem is also straightforward. The junction box is located at the back of your solar panel, so you’ll just need to open up your solar panel and ensure that your junction box is screwed in properly.

Cracked Panels

If this is the root of the problem, you will simply need to fix the cracks on your solar panel by means of solar panel repair or replace the panel altogether. 

Unfortunately, there is no easy or cheap way around this problem, so we hope for your part that this isn’t the case.

Correct Your Measurement Method

The solution to this problem simply entails ensuring that your solar charge controller is on the right setting to measure both the voltage and current of your circuit. 

If the problem persists, consult your solar system’s manual and follow the neatly laid out installation steps in a precise and orderly fashion. 

if Solar Panel has Voltage but No Amps

In the event that you are still having trouble with your current readings, do not hesitate to contact either us (Shop Solar Kits) or the manufacturer of your solar power system, where qualified professionals will be able to guide you through this complicated process.

Conclusion

Overall, it should be clear that if a solar panel has voltage but no amps, it is by no means a train smash. More often than not, it does not mean that your solar panels are not working altogether. 

Using the steps and information that we’ve laid out above, you’ll be able to get to the bottom of this problem by diagnosing the correct cause of the problem and remedying it appropriately. 

Sometimes, this problem may still persist in which case we advise you never to be afraid to contact professionals who are capable of guiding you through the process of fixing this problem.

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