Bidirectional EV Chargers: Power on the Road and at Home

Your electric vehicle is already an efficient way to get around, but what if it could do more than just drive? With a large battery holding significant energy, your EV is a powerful, mobile resource that might become a two-way power source for your home. 

This emerging technology is called bidirectional charging. It lets your EV provide critical backup power during an outage, or even to the electricity grid, helping you save money on energy bills. 

Bidirectional EV chargers aren’t yet the norm. In this article, we’ll break down how bidirectional charging works, which EVs support it, and the costs involved, so you can see if this revolutionary technology is the right next step for your home's energy independence.

What is a bidirectional EV charger?

A bidirectional electric vehicle (EV) charger charges an electric vehicle and can send power from your vehicle back to your home or the grid. It enables that two-way flow of electricity.

Compared to traditional chargers that can only send power to an EV’s battery, a bidirectional charger allows EV owners to discharge electricity from their vehicle to use onsite, share, or sell.

How bidirectional EV charging works

Bidirectional EV charging works in several different ways that can benefit homeowners, travelers, businesses, communities recovering from natural disasters, and the energy grid. 

Vehicle-to-home (V2H) and vehicle-to-building (V2B) charging

Vehicle-to-home charging, also known as vehicle-to-building charging, allows your EV to function as a backup generator for your home.

Whether the grid has a temporary power outage due to severe weather conditions or utility rates are at their highest due to local demand, V2B and V2H chargers help you pivot from grid-supplied electricity and power your property with your vehicle’s battery reserve. 

Vehicle-to-grid (V2G) 

With the proper equipment and local utility agreements, bidirectional EV chargers may be used as vehicle-to-grid chargers. With V2G charging, power is exported from your EV’s battery reserve and sent to the electricity grid.

Vehicle-to-load (V2L)

Some vehicles have bidirectional charging capability built in that allows you to directly power home appliances, camping equipment, mobile workstations, large electronic devices, power tools, and more.

Unlike V2H and V2G charging, V2L does not require a bidirectional charger, as the EV uses an integrated inverter to send AC power directly to the device.

Vehicle-to-vehicle (V2V)

Some EVs can use stored power to charge another EV. It can be a useful feature if you need to rescue someone who’s run out of charge.

Vehicle-to-everything (V2X)

While the early iterations of bidirectional charging are designed to work with either your home, the grid, or a specific electric load, many manufacturers are looking to adapt their bidirectional charging systems to work with anything, integrating all of the bidirectional charging types into a single vehicle.

A recent pilot project in Massachusetts will see electric school buses dispatching electricity from their batteries to the grid while parked during the summer.

Benefits of bidirectional charging

With vehicle-to-grid and vehicle-to-home charger technology, bidirectional EV charging can deliver many benefits for homeowners and their communities. 

Backup power

Energy resilience is perhaps the most important benefit of bidirectional EV chargers. With a backup source of electricity on wheels, bidirectional charging can help keep homes online during blackouts, or deliver power to areas in crisis after forest fires, hurricanes, or other disasters.

Demand response

Even if there is not an emergency, bidirectional EV chargers can help stabilize the supply and demand on the power grid.

To increase the energy supply during peak demand hours, electricity companies can incentivize EV owners to discharge their battery power in exchange for bill credits or other compensation. Virtual power plants are another way to participate in demand response and get compensated in some areas. 

Optimized charging costs and energy savings 

While managing the flow of electricity between your home, vehicle, and the grid, bidirectional EV chargers can decrease your EV charging costs. Especially when connected to a home solar energy system, bidirectional chargers make it easy to power your life with the electricity source you prefer.

For example, when you charge your EV with the energy produced by your home solar panels each day, you can run your vehicle with the power of the sun, export the clean electricity to your home, or send it to the power grid.

Portable power

While home backup batteries provide the resilience benefits of energy storage in a fixed location, EVs equipped with bidirectional charging can do so on the go. An EV with bidirectional charging could be a versatile and mobile support in a lengthy outage.

Energy independence

Home solar panels represent one huge step toward energy independence. Energy storage takes it farther.

Whether that battery is stationary or mobile, it can help you avoid even more grid energy and help you better navigate power outages by backing up essential loads (like lighting, a refrigerator, or your Wi-Fi router).

What EVs have bidirectional charging?

Only some electric vehicles on the market today can support bidirectional EV charging. This list will change with time, so be sure to confirm your preferred EV matches your desired charging capabilities. Some capabilities may only be available for newer models and models that lacked these capabilities may have them unlocked later with an over-the-air software update.

Finding the right bidirectional EV charger for you

Here are some factors to consider as you’re finding the right bidirectional charger. 

• Compatibility: Not all EVs support bidirectional charging and not all bidirectional EVs work for every possible use case. Your home electrical system and setup may not be immediately compatible either. Some homes may need a dedicated 240V outlet installed. 
• Your charging needs: What are the main uses you’re looking for in bidirectional charging? If it’s just powering your campsite, V2H charging likely isn’t necessary. 
• Installation and specifications: Bidirectional chargers generally need upgraded 240V outlets. In some cases, electrical work such as a new electrical panel may be needed. Account for any extra work and expense as you’re shopping.
• Extra features: Some bidirectional EV chargers, have smart capabilities, scheduling functions, and automatic energy management. 

Major bidirectional EV charger brands

There’s an increasing number of brands and models of bidirectional EV chargers. Here are some brands to look at.

• dcbel
• Enphase
• Wallbox
• Sigenergy
• SolarEdge
• Fermata

Bidirectional EV charger cost

Bidirectional chargers will cost more than one-way home EV chargers. They’re both more capable and complex, while also being less commonly sold and installed.

For example, to use your EV as a vehicle-to-home bidirectional battery, GM vehicles require a GM-specific charger (currently priced at $1,999) and a GM Energy V2H Enablement Kit (currently priced at $6,999). Those will also need to be installed by a licensed electrician.

As bidirectional charging becomes more common, prices could fall.

Bidirectional EV charger incentives

Home EV charging equipment may be eligible for federal tax credit of 30% up to $1,000 of the cost of the equipment, related components, and labor and installation. Eligibility is also based on location. The credit is available through June 30, 2026.

To learn more about the tax credit overall, see the Department of Energy’s information. More about eligibility by location across the country is available. 

It’s also worth checking for local or utility-level incentive or rebate programs you may qualify for. You can contact your local utility or go to your utility’s website.

For more information on how to power your electric vehicle, check out our guide to EV charging. You can see how much you could save by going solar by getting a free solar quote today and exploring the impact of other home energy upgrades with Palmetto’s Energy Advisor or by exploring the free Palmetto app, where you can learn and earn discounts on EV chargers.

Frequently asked questions

Which EVs have bidirectional charging?

Not all EVs have bidirectional charging as a feature. Chevy, Cadillac, Fisker, Ford, Genesis, Hyundai, GMC, Jeep, Kia, Lucid, Mitsubishi, Tesla, and Volkswagen have EV models with bidirectional charging capabilities.

Why do people want bidirectional charging?

Bidirectional charging can give EV owners and solar owners benefits such as backup power during outages and more flexible and reliable energy options. 

How much does a bidirectional EV charger cost?

The price of a new bidirectional EV charger varies based on its features, capacity, and speed. You need to take compatibility into account, too. Bidirectional EV chargers range from about $850 to more than $10,000 depending on the other equipment required.

What is the best vehicle to home charger?

The best vehicle to home charger is the one that is compatible with the EV you have, fits your budget, and provides the bidirectional capabilities and capacity you need.

Disclaimer: This content is for educational purposes only. Palmetto does not provide tax, legal, or accounting advice. Please consult your own tax, legal, and accounting advisors.