How to Charge Car Battery Using Home Electricity

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How to charge a battery with home electricity

The battery turned dead all of a sudden? Anyone who hears that is unlucky, of course.

A battery can die for a variety of causes, but let’s avoid getting into that since I know you’re here to discover a solution.

As long as you don’t seek assistance, an uncharged battery shouldn’t keep you stranded at home.

How to Charge Car Battery Using Home Electricity

We’ll reveal a terrific getaway strategy here: charge your automobile battery using energy from your home.

Can you Charge a Car Battery Indoors?

The two most well-liked and practical techniques can be used to recharge your automobile battery at home. Either a home inverter or a 12V battery charger can be used to do this.

These techniques are as simple as they seem, yet failing to use them correctly can have disastrous results.

Therefore, what we’ll be doing here is a step-by-step guide for both methods. In the end, you can choose whatever looks more workable to you.

Method 1: Using 12V Battery Charger

To execute this method for charging your car battery, you’ll need to get your hands on a high-quality charger.

Make sure this charger is compatible with the battery by checking its voltage/power ratings; otherwise, it will do no good.

Once you’re done with the purchase, prep yourself for starting the process

  1. Make sure the area is dry around you and the battery.
  2. No flammable objects around
  3. Wear electricity-resistant gloves.
  4. Wear safety goggles or a face protection shield.

You can now begin the charging procedure after passing all the safety inspections.

1. Disconnect the battery from your car

To do so, remove the negative (black) terminal of the battery.

Next, unplug the positive (red) connector of the battery. Now take out the battery from the car and safely place it on a dry surface.

2. Clean the battery

At this point, cleaning the battery is essential because you wouldn’t do it frequently otherwise.

To clean your battery, grab a wet cloth dabbed with baking soda or sandpaper and remove all the dust and grime from the storm.

Read More: How to Clean Car Battery Corrosion

3. Make connections

Get the battery charger now, and start making connections.

Firstly, connect the battery’s negative (black) wire to the black/negative port on the charger, and then click the positive (red) wire to the positive/red port of the charger. 

Note: While making these connections avoid connecting the battery charger to a power source.

4. Connect to a power outlet

Once all the connections have been made, you can finally connect the charger to a power outlet and let your battery charge in peace.

The battery will give you an indicator or alarm when fully charged. Aside from that, once the battery is charged, the charger shuts off automatically.

Read More: Best Car Batteries For Cold Weather

Method 2: Using Home Inverter

If you’re in a hurry, you can use this method to charge a car battery more quickly than with a battery charger. However, frequent use of this method can damage the car battery.

You can use this method once in a while. So let’s see how you can achieve a fully charged battery with a home inverter.

Any 12V-rated home inverter can easily charge 12-14V automobile batteries. As mentioned earlier, take care of all the safety precautions while executing this method.

Safety should always come first because any carelessness could have fatal results!

1. Open the hood of your car and start disconnecting the battery. The method is the same as mentioned earlier; remove the black negative and cheerful red wire of the storm

2. Take the battery out of the car, place it on a dry surface and clean any dirt or debris from its surface

3. Now connect the (black) negative terminal wire of the battery to the black output port of the inverter. Likewise, the positive red wire of the battery to the red port of the inverter.

Before making these connections, remember to disconnect the inverter from the power source.

4. Carefully check all the connections and connect the inverter to the power supply.

5. That’s it! Your battery will be charged within 1-3 hours.

Frequently Asked Questions

Can a car battery charger be left on overnight?

Overcharging a battery is never a good idea; that’s no secret.

However, most high-quality car battery chargers turn off automatically once the charging is complete, and in that case, you don’t have to worry about leaving it on overnight.

But since we recommend you always be on the safe side, do not leave the battery connected to a charger for more than 24 hours.

How do you charge an empty car battery?

A car’s alternator cannot recharge a dead battery, unfortunately.

As a result, you’ll need to use alternative methods like the ones stated above, such as a home inverter or a car battery charger.

Safety Tips for Battery’s Good Health

You need to take a few steps to make sure your battery is in good condition if you want to avoid having a dead battery.

  1. If you don’t use your car much, your battery is more likely to die. To avoid a dead battery, take your car out for a 5-6 hour drive once every week. 
  2. Once the engine is shut off, don’t forget to turn off all the battery-operated appliances, including the radio.
  3. Use the car regularly to keep the alternator functional for charging the battery. 
  4. Keep the battery clean and regularly remove any grime or dirt build-ups from it.


You can safely recharge your automobile battery using either of the aforementioned techniques if, by chance, it has become dead.

It takes a battery charger 6 to 12 hours to fully charge, but it is safer. A home inverter may charge your battery within 1-3 hours but is not recommended for frequent use.

Read More:

Does Dash Cam Work When Car is Off

How to Fix a Leaking Car Battery?

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