How Long Does It Take to Charge a 48V Battery?

Do you have a super73 battery that you want to charge at home? Or maybe you already have one that isn’t charging right. 

Either way, I’m sure you’re wondering about the best way to can charge your battery at home. How long does it take to charge a 48V battery? How can you avoid overcharging it? These are questions you must have. Keep reading because we’ve discussed them below. 

How Long Does It Take to Charge a 48V Battery?

Charging a 48-volt battery can take anywhere from 4 to 20 hours, depending on the charger you use. You need to check the ampere/hour rating of the battery and then the ampere rating of your charger. Then simply divide the amp hours of the battery with the amperes the charger can provide. 

For example, if you’re using a 2 Amp charger and your 48V battery has a 20 Amp rating, it’s going to take you 10 hours to charge it. How long does it take to charge a 48V battery? As we’ve discussed, that depends on both your charger and your battery’s ampere per hours rating. 

If you want faster charging, you can choose a charger with a greater ampere rating. Additionally, when choosing a charger, also be careful of the Voltage rating. For a 48V battery, you need a charger with at least a 52 V rating. 

What Should a 48-Volt Battery Read When Fully Charged?

A 48 V battery should read about 54.6 V when it is fully charged. For any battery, the way to calculate its required final voltage reading is simple. 

Each cell in the battery should be fully charged at 4.2 V. So if a battery has 10 cells, it should be fully charged at 42 V. However, a 48V battery has 13 cells, so it is fully charged at 54.6 V. 

Still, it is perfectly normal for the final voltage reading to be a little off from your calculations. Your voltmeter might not be functioning right or might not be as precise. Additionally, some of the cells might not have been fully charged to 4.2 volts. 

Finally, the voltage will be highest if you measure it right after disconnecting the charger. The reading will decrease the longer you take before measuring. How long does it take to charge a 48 V battery? As long as it takes to reach 54.6 V. 

Can You Overcharge a 48V Deep-Cycle Battery?

Yes, it is possible to overcharge a deep-cycle battery. Deep-cycle batteries are typically lead batteries that are sealed and gelled. If you overcharge these batteries frequently, voids develop in the gel which has serious effects on the batteries’ life. 

To prevent this issue, you can invest in a better charger.  Today, chargers come with special overcharge prevention circuits that read the voltage of the battery as it is charging. As the voltage increases to maximum, the charger automatically cuts off the electricity supply to the battery. This ensures the battery does not overcharge.

Also read: What Happens if You Put Two Batteries in Parallel?

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Arsal Sher — Mud Bike Writer

With an interest in dirt bikes developing from an early age, Arsal now pursues his passion for bikes by restoring old ones. He specializes in vintage collectibles and works hands-on with motorbikes when he has time to spare from his content writing career.


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