What do you do when the power goes out? The issues that arise range from inconvenient to much more significant. At the very least, it’s an annoying interruption that usually means you’ll need to rearrange your day and work around your now-inoperable systems.
Thankfully, systems that will make this interruption a thing of the past are becoming more popular every day. For years, battery-backed solar systems have made it possible to keep the lights on when the grid fails. Now, there’s a new technology just beginning to take off. It’s called bidirectional charging (or V2X). It uses your electric vehicle (EV) as a battery to power your house or earn energy credits from your local utility.
Unlike traditional one-way charging, V2X systems allow energy to move between your EV, your home, and eventually, the grid. More and more, California homeowners are exploring backup power and energy independence. (PGE, 2026) Our unique position, where we experience power outages, wildfires, and TOU pricing, often makes us early adopters of new technologies. This is true of bidirectional charging, as well. (calmatters, 2023)
V2X technology is still relatively new to residential markets. However, interest has grown rapidly as concerns about grid reliability grow and EV manufacturers are beginning to embrace the technology. Utilities, automakers, and energy companies are increasingly investing in bidirectional charging as part of the future “smart grid” ecosystem. (DOE, 2025) Strong EV and solar industries, wildfire-related outages, and time-of-use electricity pricing have all contributed to California becoming one of the largest markets for V2X adoption. (Utility Dive, 2020) As more compatible EVs enter the market and charging standards mature, industry analysts expect V2X adoption to take off over the next decade. (v2gnews)
Bidirectional charging is a technology that allows an EV battery to both receive and send electricity, as opposed to standard EV charging, in which EVs only receive electricity from the grid. (DOE) V2X makes a lot of sense when you think of the EV not just as a vehicle to be charged, but as an enormous battery with the capacity to power the appliances and systems in your home by itself for several days. For comparison, a current Tesla Model Y Long Range holds about 79 kWh of energy, which is almost 6 times a Tesla Powerwall 3’s 13.5 kWh capacity. (Tesla, 2026)
A bidirectional charging system consists of several components: (DOE)
A compatible EV (more on this later)
An inverter and home electrical panel (and bidirectional charger)
Energy management software
For the purposes of this article, V2X can be divided into two categories: vehicle to home (V2H) and vehicle to grid (V2G). For V2H applications, your EV powers your home during power outages or peak-rate periods. V2G can be used to send power back to the grid to support demand or participate in utility programs. Compatibility standards are still evolving across manufacturers and regions, and V2H compatibility is currently more common than V2G. (cleanenergyreviews, 2024) Commercial pilot programs have existed for years, but residential V2X adoption is still in its early stages. The reason for this slower adoption is that compatible EVs, utility programs, and charging standards are still developing, and they’re developing simultaneously. However, growing support from major automakers and utilities is a good sign. It suggests that the technology is heading toward more mainstream adoption. (DOE, 2025)
So, who do we expect to adopt V2X first? The most likely candidates are California homeowners with a rooftop solar system in place who want to store and use more of their own energy. (renewableenergyworld, 2022) While a solar system isn’t necessary to take advantage of a V2X system, the two technologies pair nicely and work well together. (nacleanenergy, 2024)
Other likely early adopters include: (ASES, 2026)
V2X provides several advantages to the home- and EV-owner at a minimal relative expense:
Backup power
EV batteries can provide emergency power during outages, often with larger capacity than standard home batteries. EV batteries are large enough to support essentials like refrigeration, lighting, and internet access. (greencars, 2026)
Cost savings
V2X gives you the ability to charge your EV during lower-rate, off-peak hours when electricity is cheaper, then use that stored energy to power your home during expensive peak-rate periods. This helps to reduce overall electricity costs. (DOE, 2025)
Energy independence
Pairing bidirectional charging with solar allows homeowners to store excess solar energy in their EV battery during the day instead of sending it back to the grid. That stored energy can then be used later at night or during peak-rate periods, reducing reliance on utility power and increasing the amount of solar energy used directly in the home. (ASES, 2026)
Potential utility incentives
Some utilities and pilot programs offer compensation for grid-support participation.
The Growing V2X Market
Current leaders in the V2X market include automakers, charger manufacturers, battery companies, and home energy platform providers. The major players in the market currently include Ford, Tesla, GM, Hyundai/Kia, Enphase, Wallbox, and Sigenergy.
The companies that are able to create the most seamless connection between EV charging, solar energy, battery storage, and utility interaction will likely lead the industry moving forward. Analysts expect companies that can simplify installation, improve compatibility, and create flexible “whole-home energy systems” to be the long-term industry leaders. (McKinsey, 2025)
Which Vehicles Support Bidirectional Charging?
Not all EVs are V2X compatible, but more automakers are adding bidirectional EV charging capabilities each year. Here are some examples of EVs that are currently V2X compatible: (ecoflow, 2026)
• Ford F-150 Lightning
• Hyundai Ioniq 5 and Ioniq 6
• Kia EV6
• Nissan Leaf
• Tesla Cybertruck
• GM Ultium-based vehicles
The availability of V2H or V2G features may depend on software, charger compatibility, and local utility approval. Manufacturer support is expected to continue expanding as V2X standards mature.
While V2X adoption is gaining momentum, there are still only a few fully installed and operational residential systems compared to the number of traditional EV charging installations. Because EV and solar adoption rates are among the highest in the country, California has one of the highest concentrations of V2X technology in the U.S. Wider adoption is expected as utilities increase support of V2G programs and more manufacturers release compatible vehicles and chargers. (DOE, 2025)
There are a few things to think about if you’re getting ready to pull the trigger on your own home V2X system.
As mentioned above, not all EVs support bidirectional charging, so homeowners should confirm vehicle compatibility first. As with any new technology, you’ll need some additional hardware. Systems require a dedicated bidirectional charger plus supporting equipment like an inverter and transfer switch. The Sigenergy SigenStor system integrates all of these technologies into a single stackable, modular unit. Some homes (especially older ones) may need electrical panel upgrades or additional wiring installed. (Tesla, 2026)
Installation is not a DIY project. Professional installation is important for code compliance, utility coordination, and system safety. Homes with existing solar or battery storage systems may require additional integration planning.
Homeowners should consider what happens if the EV is unavailable during an outage. We recommend pairing an EV with a smaller stationary battery that can provide continuous backup power while the vehicle is away. Hybrid systems that combine EV storage and dedicated batteries can improve flexibility and resilience. (CNET, 2025)
Founded in 2022, SigEnergy is focused on integrated residential energy systems. These include solar storage, EV charging, and bidirectional charging. The company is currently developing products designed around the future of V2X and whole-home energy management. Its systems create a single ecosystem around EVs, battery storage, and home backup. (SigEnergy, 2024)
While some companies are creating rigid all-in-one setups, SigEnergy builds flexible, modular home energy systems that homeowners can build gradually over time to better adapt to budget, vehicle compatibility, and energy needs. With this modular approach, components function like interchangeable building blocks. Users can start with solar battery backup, then add EV charging and/or bidirectional charging later. Additional batteries or V2X capabilities can be integrated without replacing the original SigEnergy system. (SigEnergy, 2026)
This approach reduces the pressure to invest in a full V2X setup immediately and allows homeowners to adapt as utility programs and EV compatibility continue to evolve, creating a scalable, future-proof home system. (NeoVolta, 2026) Rather than standalone hardware, the emphasis is on an integrated ecosystem design that lends flexibility, expandability, and long-term compatibility that can evolve alongside changing EV and energy standards.
SigEnergy has positioned itself as a leader among energy companies that are increasingly moving toward interconnected home energy ecosystems that combine solar, battery storage, EV charging, and backup power into a single platform.
Bidirectional charging is changing the way homeowners use EVs, solar energy, and backup power as an integrated system. This technology offers cost savings and energy independence. Nowhere will these benefits be felt more than in California. The factors that most affect immediate adoption are compatible vehicles, professional installation, and evolving utility programs.
While the market is still evolving, V2X technology is increasingly being viewed as an important part of the future residential energy landscape. As EV manufacturers continue to integrate this technology, bidirectional charging could become as common as rooftop solar systems are today.
Speak to a Citadel Roofing & Solar installation expert today about EV compatibility, electrical system requirements, and solar integration. To find out whether bidirectional charging makes sense for your home, schedule a consultation today.
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