How To Charge Car Battery With Home Electricity?

Last Updated on July 21, 2023 by Henry T. Hawkins

You can charge your car battery with home electricity by using a car battery charger that’s compatible with your car. First, connect the black wire to the charger’s negative side port. Next, take the red wire and attach it to the charger’s positive side port.

Double-check that they’re secure; if not, it could cause a fire. Next, find an outlet to plug your car battery into. Once it begins charging, don’t touch any of the wires attached to it.

In this article, we will thoroughly explain how to charge a car battery with home electricity, how many ways you can change your car battery with home electricity, and how to do all of these things in the simplest way possible.

We will give you some tips on how to get the most out of your charging experience. So, what are you waiting for? Let’s get started!

How To Charge Car Battery With Home Electricity

How to charge a car battery with home electricity?

Charging a car battery with home electricity is an easy process, provided you have the right equipment. Before trying to charge your car battery at home, make sure it is compatible with the type of charger you are using and that it is safe to do so.

The steps on How to Charge a Car Battery using Home Electricity are listed below.

  1. Purchase a quality charger that meets your requirements. You’ll need to buy a charger that can deliver enough power, depending on the size of your car battery and how much electricity you use.
  2.  Connect the charger to both the positive terminal on your car battery and a grounded metal surface (such as an engine block). Most chargers come with color-coded clamps that make it easy to tell the difference between positive and negative.
  3. Make sure your charger is set to the correct voltage for your car battery before turning it on. This is typically located in the owner’s manual or on the battery’s side.
  4. Allow your charger to charge the battery for at least two hours, checking periodically to ensure that it is functioning properly.
  5. The charger should be turned off after the battery has finished charging, and the battery terminal clamps should be removed.
  6. It’s important to wait for your car battery to cool down after a charge before trying to start it again.

This will ensure that your car’s battery process works at optimum efficiency. 

Also read: Can a weak car battery cause electrical problems

How many ways can I charge a car battery with home electricity?

There are two ways to charge a car battery with home electricity.

Method 1: Using a Home Inverter

You can charge your car battery at home using a household inverter. A household inverter is a device that provides power to electric appliances, similar to how a battery consumes and transfers power when needed.

Nowadays, home inverters are more affordable and much more powerful than they were in the past. Typically, a home inverter has a 12V lead-acid battery.

Even though a home inverter is 12V, it can be compatible with other voltages. A car battery will take less time to charge if you use a charger designed for homes. Keep in mind that household inverters are not made for charging car batteries though.

You should not charge your car battery at home with an inverter on a regular basis even if it is more convenient. If you do so, your car battery’s voltage may become unstable.

However, in times of emergency, this process will be easy and accessible to follow.

Step 1: Setup The Connection

– Do not connect your home inverter to the power supply before setting up the connection. You will need to safely connect it to the power supply after making sure all other connections are secure. If you do connect it prematurely, it can damage or harm your battery.

– After you check the home inverter, connect the battery’s ground or negative cable to the black wire of the inverter. If needed, test your battery cables.

– Now connect the battery’s positive cable to the red port of the home inverter’s output.

Step 2: Supply The Power From The Home Inverter

You must ensure that all connections between the car battery and home inverter are secure before turning on the power supply. To do this, simply check each connection carefully. Once you have done that, plug the inverter into any available power outlet in your home.

Step 3: Let The Battery Get Fully Charged

After making sure all the cables are properly plugged in and connecting the inverter, you only need to wait for it to recharge. Your car battery will be fully recharged within 1.5 or 2 hours with this method.

As you know a home inverter or household inverter is a powerful device, so it can help you charge your car battery faster than other methods.

Method two: Using A Car Battery Charger

Step 1: Prepare your car battery for the charge.

Before you begin charging your car battery with a charger, a few preparation steps are necessary to ensure safety and compatibility.

First, confirm that the surface on which you will be placing the battery is clean and dry. Next, get to know your charger by reading the user manual.

Step 2: Remove The Car Battery And Clean

Fortunately, removing the car battery is not a difficult task. If you own a car, I trust that you know how to remove its battery. If you don’t know how to remove the battery from your car, this guide is for you.

It’s important to keep your car battery clean and free of dirt and grime. If you haven’t cleaned it in a while, take some time to do so now.

There are a few ways to clean your battery surface:

– Rub the surface with sandpaper for an easy solution.

– For a natural cleaning option, mix baking soda and water then apply it to the battery with a cloth or toothbrush.

– Use a commercial battery cleaner available at auto parts stores.

Step 3: Connect The Charger To The Battery

Once you have the battery removed from your car, it’s time to connect the charger. Take a look at the instructions that came with your charger for detailed setup instructions.

Once everything is connected properly, plug in the charger and turn it on. You should see lights on the charger indicating that it is working correctly.

Step 4: Monitor The Charge And Disconnect When Done

Now all you need to do is wait for the charge to complete. Depending on how depleted your battery was when you started charging, this could take anywhere from 30 minutes to several hours. Make sure to monitor your charge closely and disconnect the charger once it has finished its job.

After a successful charge, you can reinstall the battery in your car and be on your way!

Remember to always consult the user manual of your charger before using it. With proper care, you should get many years of service from your car battery charger.

Step 5: Turn On The Ignition And Test It Out

Once you have reconnected the battery and are sure that it’s properly charged, turn on the ignition to test out your new charge. You don’t need to start the car just yet; simply make sure the lights, audio system, or other electrical components work as expected.

If everything works correctly, then congratulations! Your battery was successfully charged with a car battery charger.

Also read: Does Walmart recycle car batteries

How do you properly charge a car battery?

How do you properly charge a car battery

To properly charge a car battery follow the steps below so you don’t damage your battery.

1. Buying a Quality Jump/starter kit

To charge your car battery, you will need to purchase and use a quality charger/jump starter kit.

2. Deciding the Terminal

Start by connecting the red cable to the positive terminal of the dead battery, then connect the black cable to the negative terminal.

3. Take all necessary precautions

Make sure that all connections are secure and correct before proceeding.

Next, plug in the charger/jump starter kit and follow its instructions for charging your battery.

4. Disconnect the charger

After it has finished charging, disconnect it from your vehicle’s battery, then start up your engine and let it sit for several minutes to ensure that the charging was successful.

5. A thorough examination of the car

Check on your car’s electrical system to make sure everything is functioning properly.

Following these steps will help you maintain a fully charged car battery and keep your vehicle running smoothly.

Is it possible to use a home inverter to charge a car battery?

Yes, it is possible to charge a car battery using an inverter. The average home Inverter is designed for 12 Volt batteries and has a charging circuit that recharges the battery at 13-14 Volts. Car batteries are also rated at 12 volts and are charged by car alternators providing 13-14 volts.

In general, you can use an inverter to charge a car battery by using either a 12V DC charger or an AC charger that is powered by 120V home electricity.

When deciding which sort of charging system is best for you, keep in mind that some cars need specialized chargers in order to ensure the proper functioning and prevent damage to delicate components.

Once you have chosen the appropriate charging system for your car’s battery, it is important to take precautions when connecting an inverter to the car battery. Inverters can produce large amounts of current that may damage sensitive components or cause electrical shorts if not connected properly.

Is it safe to charge a car battery with a home inverter?

Yes, it is generally safe to charge a car battery with a home inverter. However, there are some important considerations that you need to take into account first.

– The inverter should have enough power output to handle the load of the car battery and should also have adequate surge protection such as a fuse or circuit breaker.

– In addition, it’s important to make sure the car’s charging system can handle the voltage the inverter supplies.

– Finally, in order to prevent damage or a fire threat from sparking or losing connections, the inverter and battery connections must be safe.

What are the electricity costs for charging a car battery at home?

The average U.S. household spends about 15 cents per kWh, which would mean spending around $59 monthly to charge an electric car.

However, an electric car charge typically costs between $0.13 and $0.32 per kilowatt-hour (kWh). The cost varies depending on the size of the battery, the type of charger used, and the cost of the power outlet in your area.

A normal EV battery requires 30 to 50 kWh of energy to fully charge, so if you’re paying 15 Cents Per KWh for power, a full charge would cost you between $4.5 and $7.5.

Of course, this cost could be lower or higher depending on how much energy is required and what kind of deal you have with your power outlet company.

It’s also important to remember that charging your electric vehicle at home does not require you to pay for gas, so the costs related to driving an Electric vehicle are usually lower than those associated with a conventional car.

Some EV chargers charge a fee for their services in addition to the cost of electricity. Therefore, while calculating the cost to charge your car battery at home, it’s important to keep this in mind as well.

With careful budgeting and planning, you can keep your car’s battery charged while keeping costs low.

What safety precautions should I take when charging a car battery at home?

You can take the following safety precautions when charging a car battery at home:

Wear protective eyewear, gloves and clothing

The electrolyte in flooded lead-acid batteries is sulfuric acid. If the concentrated form touches your skin, it will cause burns; if diluted, it can still damage clothes. What should you do if you come into contact with battery acid? Wash and flush the affected area with water immediately. If any gets in your eyes, wash them out for 15 minutes with water and go to see a doctor as soon as possible.

Make sure the area is well-ventilated and free of flammable or combustible materials

The fumes from charging a car battery can be hazardous. If there is not enough ventilation, the hydrogen gas that is produced can accumulate and become an explosive hazard.

Turn off all electrical equipment

It’s important to make sure all power sources such as lights, electric motors, etc. are turned off while you are working on the battery to avoid any electric shock or sparks.

Use a charger designed for vehicle batteries

Using chargers not specifically designed for automotive use can cause sparks and other problems that could potentially damage the battery or start a fire.

Disconnect the negative cable first

When connecting or disconnecting cables to your car battery, always do so in the reverse order in which you connected them. This is to avoid a spark from occurring when disconnecting the negative cable.

Monitor the battery temperature

Make sure to keep an eye on the battery’s temperature during charging and take it out of the charger if it starts to overheat. Overheated batteries can cause damage to both your car and home.

Always read and follow the safety instructions that come with your charger

Follow all safety warnings and guidelines provided by the manufacturer when operating a car battery charger. Doing so will ensure that your charging process is safe, efficient, and successful.

Use caution when removing a lead-acid battery

Make sure that the battery is disconnected from all power sources and allowed to cool before you attempt to remove it. Lead-acid batteries can be extremely heavy and difficult to move, so make sure you have the proper safety equipment and know how to safely lift them.

Maintain electrolytes at proper levels

Never fill batteries with a garden hose; only use distilled or deionized water in a watering pitcher, caddy, or automated system. Never fill battery cells above the level indicator.

If the electrolyte is below the plates before charging, add enough water to cover them. After fully recharging, bring the water level up to approximately ¼ inch from the bottom of well indicator. Never fill a low cell all the way to the fill well indicator before charging.

By following these precautions carefully, you can be sure that charging your car battery at home is done safely and correctly.


Is it cheaper to charge a car battery with home electricity rather than at a gas station?

Yes, charging a car battery with home electricity is cheaper than at a gas station. The monthly average to charge an electric car is $55.70, and the yearly average is $668.40 when only charging at home. In general, charging an EV per mile costs around 3.5 times cheaper than fueling a gas-powered car would cost you.

What’s the difference between a home Inverter battery and a car battery?

One of the main differences between an Inverter battery and a car battery is capacity. A typical car battery has a capacity of 50Ah, while an Inverter battery capacity is typically rated at 120 Ah.
Other differences also exist, and they are-
A house inverter battery is made to hold electricity and supply power for a long time. On the other hand, a car battery is made to deliver little bursts of electricity, typically to start the engine.
The major difference between the two types of batteries is in their design, home Inverter batteries are meant for longer-term use, while car batteries are designed for short, high-powered needs.
Another difference between a home Inverter battery and a car battery is their size and weight. Home Inverter batteries tend to be much larger and heavier than car batteries due to their capacity and the need to store more energy. Similarly, car batteries are much smaller and lighter as they don’t need to store as much energy.

Wrapping up

We appreciate you reading the post on “How to charge a car battery using home electricity?” and we hope you’ve got the information you needed.

Finally, we’d like to highlight that “charging a car battery with home energy” is not as difficult as the majority of you think it is. The only concern is to take precautions when conducting it.

The final thing to remember is to make sure you have the necessary information before doing any kind of car-related electrical work at home. Then you’re good to go!

Please share it with your friends and family members who have queries regarding this topic. Thanks again!

Happy charging! 🙂

Sharing is caring!

Leave a Comment