--- title: "Bidirectional EV charging explained" description: "Bidirectional EV charging transforms your electric car into a dynamic energy asset. Learn how V2H and V2G can power your home and even the grid." url: "https://www.fuseenergy.com/blog/bidirectional-ev-charger" updated: "2026-10-16" --- # Bidirectional EV charging explained Electric vehicles (EVs) are changing how we drive, but their potential goes far beyond transport. Bidirectional charging transforms your EV into a dynamic energy asset, able to not only draw power from the grid but also feed it back. This technology offers UK homeowners a path to greater energy independence, reduced electricity bills, and a more resilient home energy system. ## What is bidirectional EV charging? Bidirectional EV charging allows energy to flow in two directions: from the grid to your car (charging) and from your car back to your home or the grid (discharging). This differs from standard, unidirectional charging, which only allows electricity to flow into the vehicle's battery. With the correct equipment, your EV battery becomes a versatile energy storage system, storing energy when it is cheapest or cleanest and deploying it when most needed. ### Vehicle-to-Home (V2H) explained Vehicle-to-Home (V2H) technology enables your EV to power your household directly. Energy stored in your car's battery - whether charged overnight on a cheap tariff or topped up from solar panels - can run your home appliances. This capability is particularly valuable during power outages, effectively turning your EV into a home battery backup, and during peak energy pricing periods, allowing you to draw from your car instead of the grid. ### Vehicle-to-grid (V2G) explained Vehicle-to-grid (V2G) takes bidirectional charging a step further by allowing your EV to send surplus energy back to the national electricity grid. This can happen during periods of high demand, with some energy suppliers paying you for the electricity your car provides. Beyond the financial benefits, V2G plays a crucial role in balancing the grid, helping to ensure supply and demand remain in sync and supporting the integration of renewable energy sources. > **What is the difference between V2H and V2G?** > > V2H (Vehicle-to-Home) routes energy from your EV to power your house, offering backup during outages and reducing reliance on the grid during peak times. V2G (Vehicle-to-grid) sends energy from your EV back to the national electricity grid, helping balance demand and potentially earning you money from your energy supplier. ## How bidirectional charging works The magic of bidirectional charging lies in its ability to manage energy flow dynamically. It transforms your EV from a simple consumer of electricity into an active participant in your home's energy ecosystem. ### The role of the bidirectional charger A bidirectional charger is the central component that makes this two-way energy transfer possible. Unlike a standard EV charger, a bidirectional unit contains an inverter that can convert the EV's stored direct current (DC) energy into alternating current (AC) power, which is what your home and the grid use. This specialised hardware, along with sophisticated software, controls when and how energy flows. For V2G functionality, these chargers must also be certified to G99 grid code standards in the UK. ### Energy flow and management The process involves smart communication between your EV, the charger, and potentially your home energy management system or energy supplier. When charging, the system draws power from the grid or renewable sources like solar panels to fill your EV's battery. When discharging, it sends stored energy from the vehicle back into your home's electrical circuits (V2H) or exports it to the National Grid (V2G). This intelligent management allows you to optimise energy use, for example, by charging your car when electricity is cheap and abundant, then using that stored energy when prices are high or the grid is under strain. ## Benefits for UK homeowners Adopting bidirectional EV charging offers several compelling advantages for UK homeowners, moving beyond simply driving an electric car to actively managing your home's energy. ### Reducing energy bills and maximising savings Bidirectional charging can significantly reduce your household energy costs. By charging your EV during off-peak hours when electricity is cheaper, and then using that stored energy to power your home during peak times, you can minimise expensive grid imports. With V2G, you can even sell surplus energy back to the grid, potentially saving homeowners hundreds of pounds annually. This smart energy arbitrage turns your EV into a financial asset. ### Enhancing home energy resilience A bidirectional EV provides a valuable layer of energy resilience. In the event of a power cut, a V2H-enabled EV can act as an emergency power source, keeping essential home appliances running. This capability offers peace of mind and reduces reliance on the grid during unexpected outages. ### Supporting the UK grid By participating in V2G schemes, you contribute to a more stable and sustainable National Grid. Your EV's battery can help balance electricity supply and demand, reducing the need for fossil fuel power plants to kick in during peak periods. The UK government has supported V2G trials and projects, indicating a future regulatory environment that encourages this bidirectional energy flow. The UK's grid code standards, such as G99, are in place to manage the connection of generation equipment, including V2G chargers, to the electricity Network. ## Practical considerations for adoption While the benefits are clear, implementing bidirectional charging involves several practical steps and considerations for UK homeowners. ### Compatible electric vehicles and chargers Not all EVs are currently bidirectional-compatible. As of 2026, a growing number of models support this technology. Key examples include the Nissan Leaf (which uses the CHAdeMO standard for V2G/V2H), the Kia EV9, Hyundai Ioniq 5 and 6, and Volkswagen ID. family models (gaining V2H capability via software updates). Other models like the BYD Dolphin and Renault 5 E-Tech also offer V2G or V2H capabilities. It is important to note that Tesla models do not currently support V2G or V2H. For more details on charging your EV at home, you can read our guide on EV charging at home. For the charger itself, you will need a dedicated bidirectional unit. Popular options in the UK market include the Wallbox Quasar 2 and the Zaptec Pro V2G. ### Installation requirements and costs Installing a bidirectional EV charger is more complex than a standard charger. The cost for a bidirectional EV charger installation in the UK can be substantial, often requiring professional assessment and potential electrical upgrades. This cost covers the specialised unit and the professional installation required to ensure compatibility with your home's electrical system and, for V2G, with the National Grid. Additional electrical work, such as consumer unit upgrades or main supply enhancements, could add further costs. While government grants are available for some EV chargepoint installations, these primarily target specific groups. For example, the EV Chargepoint Grant for renters and flat owners provides up to £500 towards installing a chargepoint if you own and live in a flat or rent any residential property with private off-street parking. Similarly, the EV Chargepoint Grant for households with on-street parking offers up to £500 for those installing a cross-pavement solution. Owner-occupiers in a house with private off-street parking are not eligible for these domestic grants. Always check eligibility and confirm with a certified installer. ### Navigating UK regulations and tariffs For V2G functionality, your charger must comply with UK grid regulations, specifically G99 certification. While V2H (powering your home only) generally does not require Distribution Network Operator (DNO) permission, V2G (exporting to the grid) necessitates a G99 application to your DNO. To maximise the financial benefits of bidirectional charging, you will need a compatible smart energy tariff. These tariffs are designed to incentivise charging during off-peak periods and may offer payments for energy exported back to the grid. Octopus Energy's "Octopus Power Pack" is one example of a V2G tariff available in the UK. ## The future of home energy with your EV Bidirectional charging is a cornerstone of future home energy management, integrating seamlessly with other smart technologies to create a truly optimised system. ### Integrating with solar and battery storage Your bidirectional EV can work in harmony with home solar panels and static battery storage systems. Imagine charging your EV with surplus solar energy during the day, then using that stored energy to power your home at night, or even selling it back to the grid. This creates a powerful, self-sufficient energy ecosystem, reducing your reliance on traditional energy sources and maximising the value of your renewable generation. Understanding your energy usage is key to optimising such a system; our guide on understanding your energy bill can help. ### Fuse Energy's role in smart energy management Bidirectional charging aligns perfectly with Fuse Energy's vision of a future with abundant energy, giving you unprecedented control over your home energy. We believe in embracing innovative technologies like bidirectional charging to move beyond a scarcity mindset in energy. This technology enhances your capability to manage and optimise your energy, turning your EV into a dynamic asset. While Fuse Energy does not currently sell or install bidirectional EV chargers, our smart tariffs and energy management app are designed to complement such advanced systems. We empower you to make the most of your home energy setup, ensuring you have more energy flexibility and potential savings. --- Rates, availability, and regional off-peak windows change. Check the source page for current terms. **Disclaimer** For the avoidance of doubt, this article is provided for informational purposes only and is not intended to constitute legal or financial advice. The author and/or Fuse Energy shall not be responsible for any losses arising out of any reliance on the information contained herein.