manjoeYour devices are connected to an inverter charger and everything is working perfectly until one day you notice your solar inverter is not charging the battery. What might be the cause? This is usually the first question that comes to our mind.
Anyways, when you notice this, you don’t need to panic or start looking for technical support. One of the reasons might be a low voltage caused by faulty wiring or a dead battery. If replacing or repairing the wiring and battery and still, the battery does not charge, then it may be the inverter circuit may be damaged.
This guide explains the common reasons why Your Solar inverter doesn’t charge your battery and also how to fix them.
Let’s look at some more possible reasons why an inverter fails to charge batteries.
Dead Battery
Deep-cycle batteries do not live forever; they will eventually stop working, whether they have been charged too many times or have grown old.Batteries have a charge cycle limit, which refers to the number of times they can be fully charged and drained.
This typically spans from 500 to 2000 cycles, depending on battery quality. Furthermore, batteries typically have a shelf life of about six years. If either of these is the case, it’s time to replace the battery!
And, of course, there’s always the possibility that it will be damaged in another way. Traditional lead-acid batteries, for example, might be harmed if discharged completely. You may be unable to recharge a completely flat lead-acid battery.
So, if you haven’t used or charged your battery in months or years, it could be completely dead. To keep the battery from running out of charge, utilize a trickle charger.
What is the solution? Replace your dead battery.
Burn Out Rectify
The rectifier plays an important role in battery charging. Its function in transformers is to convert AC to DC while reducing voltage.Without a working rectifier, your charger will not function.
This is because the mains energy is 120V AC (alternating current). AC electricity cannot be stored in a battery; therefore, it must be transformed into DC (Direct Current) for storage. Furthermore, battery voltage is typically significantly lower, at 12V or 24V.
If the cooling system fails and the system overheats, your rectifiers will quickly burn out.
What is the solution? Replace the rectifiers in the charger.
Blown fuse
Fuses are used in almost every electronic device. They aid in defending against power surges and short circuits. They are intended to blow or burn out in this situation to protect electrical circuits.
A fuse may be damaged as a result of problems like reverse polarity or short circuiting. Fortunately, replacing a fuse is usually a simple and inexpensive process. Your inverter or charger’s user handbook may have instructions for this. Some inverter chargers even come with spare fuses because this is a typical occurrence.
What is the Solution? Replace the blown fuse.Poor cable connection.
Loose cable connections
When you first install your charger, the connection may be snug, but it can come loose over time.This is fairly frequent in vehicles like RVs, vans, trucks, and boats. Vibrations from engines and driving might cause work connections to fail over time.
As you may expect, if the contact between cables and terminals fails, current cannot flow properly. A dip in voltage from your charger is a clear indication of loose cables.
What is the solution? Check, clean, and tighten all connections between the charger and battery.
Power Supplies
The charging current is too low.If you’ve got a new setup or have recently added batteries to your system, ensure sure your charging current is enough. This is particularly problematic if you have many inverter batteries linked in parallel.
You may discover that the amperage produced by your charger is insufficient to charge your battery bank. It is recommended that the charging current be no more than 12 times the capacity of the battery.
For example, if your charger offers 12A, your battery should not be more than 120Ah.
What is the solution? Upgrade to a larger capacity charger or reduce the size of your battery.
Lack of Battery Water
It’s surprising to imagine that many lead-acid batteries require watering. Power supplies combine battery acid and distilled water. This water evaporates over time, and without enough water, the battery cannot charge or transfer energy effectively.
You should be able to check the water level on this sort of battery to confirm that it is completely submerged or flooded. It is advisable to examine this every couple of months.
What is the solution? Fill the battery with pure water.
Tips and Warnings
These tips and workarounds assume you are experienced with inverter setups and have handled power before. If not, contact your inverter manufacturer for help.
- Check the inverter circuitry: Inverters have advanced, resulting in more complex circuitry. These components may cause issues if they are not installed correctly or if the system has other problems.
- Look up the other system components: So, if your system is connected to the grid, ensure that the other wires and components are in functioning order.
- Check the charge controller: If your inverter is not connected to the grid, the problem may be with the charge controller. A charge controller acts as a battery regulator, preventing it from being overloaded. A defective controller-inverter connection may prevent the battery or inverter from getting any charge. In this scenario, you need to repair or replace the charge controller.
- Check the solar panels: A typical off-grid solar system is configured as follows: solar panels charge the battery bank via a charge controller, guaranteeing no overload. When the battery is fully charged, the inverter starts up and will power whatever electrical load is applied to it. If there is insufficient solar power, the system will not operate. Everything is dependent on the amount of solar electricity available for the system.
Final Words
I hope this information helps you solve your problems with an inverter battery that is not charging. Problems with power supplies can be devastating, especially for those who rely on their inverter for work or survival.
Usually, there is a simple explanation for the problem, such as a faulty cable connection or a blown fuse.
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