How to Charge Car Battery Using Home Electricity 2022

The battery turned dead all of a sudden? That’s terrible news for anyone, of course. Multiple reasons can cause a battery to go dead but let’s not get into that because I know you’re here to find a way out.

A battery failure shouldn’t mean that you’re stuck at home as long as you don’t get help. Charging your car battery using home electricity is an amazing escape plan that we’ll be sharing right here.

Yes, you can charge your car battery at home by using the two most popular and feasible methods. You can do so either by a 12V battery charger or using a home inverter. 

These methods are as easy as they sound, however, not executing them properly can lead to risky consequences. Therefore, what we’ll be doing here is a step by step guide for both methods. At 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 car battery charger. Make sure this charger is compatible with the battery by checking its voltage/power ratings; otherwise, the charger will do no good.

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

  1. Ensure that the surface around you and the battery is not wet.
  2. No flammable objects around
  3. Wear electricity-resistant gloves.
  4. Wear safety goggles or a face protection shield.

As soon as all the safety checks are done, you can finally start the charging process.

1. Disconnect the battery from your car

To do so, remove the negative (black) terminal of the battery. Next, remove the positive (red) terminal from the battery. Now take out the battery from the car and safely place it on a dry surface.

2. Clean the battery

Cleaning the battery at this point is a must because you don’t do that often otherwise. To clean your battery, grab a wet cloth dabbed with baking soda or a piece of sandpaper and remove all the dust and grime from the battery.

3. Make connections

Now grab the battery charger and form connections. Firstly, connect the negative (black) wire of the battery to the black/negative port on the charger and then connect the positive (red) wire to the positive/red port of the charger. 

Note: While making these connections, do not connect the battery charger to a power supply. 

4. Connect to 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. In most cases, when the battery is fully charged, it’ll give you an indicator or alarm. Apart from that, the charger turns off itself once the battery is charged.

Method 2: Using Home Inverter

Charging a car battery with a home inverter happens faster than a battery charger, and you can employ this method if you’re in a hurry. 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 home inverter with a 12V rating can easily charge 12-14V car batteries.

As mentioned earlier, take care of all the safety precautions while executing this method as well. Any negligence can cause disastrous consequences, so safety should come first!

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

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.

Note: Disconnect the inverter from the power supply before forming these connections.

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

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

Is it safe to leave a car battery charger 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 to 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. Therefore, you’ll need to employ alternative ways like the ones mentioned above, i.e., using a car battery charger or a home inverter.

Safety Tips for Battery’s Good Health

If you want to stay clear of a dead battery, you have to take a few measures to ensure that your battery is in good health. 

  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. Don’t forget to switch off all the battery-operated devices such as headlights, radio once the engine has been turned off.
  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.


If, by any chance, your battery has gone dead, you can safely use either of the methods mentioned above to recharge your car battery. A battery charger takes a good 6-12 hours for a complete charge, but it is safer. A home inverter may charge your battery within 1-3 hours but is not recommended for frequent use.

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