Bidirectional EV Charging, V2H and V2G Readiness Bidirectional EV Charging Readiness

Many modern EVs carry more usable battery capacity than a dedicated home battery system, which is the appeal of bidirectional charging: in a compatible setup, that stored energy can flow back to power the home or export to the grid. Vehicle, charger, DNO and tariff compatibility all need to align before this is possible, so this page is for homeowners with a compatible or soon-to-be-compatible EV who want their property's electrical infrastructure ready for it. We engineer the underlying infrastructure - earthing, consumer unit topology, cable sizing - and the practical starting point is a compatibility and infrastructure assessment.

Book an Engineering Call

Bidirectional Charging: What It Is and What It Requires

Many long-range EVs carry battery packs substantially larger than a typical home battery system. Bidirectional charging enables two-way energy flow: charging the vehicle from the grid or solar, and - in compatible configurations - discharging stored energy back to your home or to the grid. This is not a standard feature of conventional EV chargers and requires specific hardware, vehicle compatibility, and electrical infrastructure.

Both Vehicle-to-Home (V2H) and Vehicle-to-Grid (V2G) require a dedicated bidirectional charger, a compatible vehicle, and a consumer unit earthing topology and cable sizing rated for two-directional current flow. Compatibility depends on the specific vehicle model, charger, inverter or home energy system, grid connection type, and - for V2G - commercial and regulatory availability in your area. We design and install the electrical infrastructure so that your property is prepared for compatible bidirectional systems, now or in the future. See our EV charging hub for an overview of all EV services.

EV charger with bidirectional capability installed in a residential property

V2H and V2G: Two Approaches, One Electrical Foundation

Vehicle-to-Home and Vehicle-to-Grid have different objectives and different technical and regulatory requirements. Both depend on compatible vehicle and charger hardware, correct electrical infrastructure, and - for V2G - regulatory frameworks that are still developing in the UK. We explain what is currently practical and what requires future-ready planning.

Residential property with an EV parked outside, illustrating vehicle-to-home potential

Vehicle-to-Home (V2H)

V2H uses the vehicle's battery to supply power back to the home when the vehicle is not in use. Where the vehicle, charger hardware and home energy system are all compatible, it can allow a household to draw from the vehicle during peak grid hours, or as backup supply during an outage. The practical benefit depends on the vehicle's available battery capacity, how frequently the vehicle is at home, the home's energy demand, tariff structure, and whether V2H hardware is compatible with the specific vehicle platform. We specify and install the consumer unit earthing topology, bidirectional circuit and cable sizing that V2H requires - ensuring the electrical infrastructure supports the system where compatible hardware exists or becomes available. See also our battery-linked EV charging page for an alternative approach using a dedicated home battery.

EV charger with grid connection infrastructure, illustrating vehicle-to-grid configuration

Vehicle-to-Grid (V2G)

V2G goes a step further than V2H by allowing a vehicle to export stored energy directly to the public grid, not just to the home. In principle, this allows vehicle battery capacity to participate in grid balancing - exporting during high-demand periods and charging during low-demand periods. In the UK, residential V2G is in early commercial availability via a small number of compatible charger and vehicle combinations. The regulatory pathway typically requires a G99 DNO application and export limiting coordination, in addition to compatible vehicle and charger hardware. Commercial and technical availability varies and is continuing to evolve. We advise on what is currently possible for your specific vehicle and property, manage the necessary applications where required, and design the electrical infrastructure for V2G readiness where it is technically and commercially appropriate.

Frequently Asked Questions

Is my EV compatible with bidirectional charging?

Compatibility depends on the vehicle, its onboard bidirectional hardware and the charger platform. A small but growing number of vehicles support V2H or V2G in the UK. We confirm compatibility for your specific vehicle model before recommending any bidirectional hardware.

What determines the cost of a bidirectional-ready installation?

Cost is driven mainly by the bidirectional charger hardware itself, the consumer unit and earthing work needed to support two-directional current flow, and any DNO application required for V2G. We provide a site-specific costed proposal after assessing your property and vehicle plans.

What is the process for making my property bidirectional-ready?

We start by confirming vehicle and hardware compatibility, then assess your consumer unit, earthing arrangement and cable routes. Where V2G is involved we manage the DNO application. Installation follows the design, with commissioning and documentation on completion.

Can I get V2G on any vehicle and charger combination today?

Not yet. Residential V2G in the UK is available through only a limited number of compatible vehicle and charger combinations, and the regulatory and commercial framework is still developing. We advise on what is currently achievable for your specific vehicle before any commitment is made.

What compliance checks apply to a bidirectional installation?

Bidirectional systems require earthing arrangements and protective devices suited to two-directional current flow, and V2G additionally requires a G99 DNO application with export limiting coordination. We design and certify every installation in line with current UK wiring regulations and manage the DNO submission where required.

What is the next step if I want to explore bidirectional charging?

Book a compatibility and infrastructure assessment so we can confirm what is currently achievable for your vehicle and property, and design the electrical infrastructure to support bidirectional hardware now or when it becomes available.