Your electric car sits parked for an average of 23 hours a day. During that time, the battery inside it does nothing. Vehicle-to-grid (V2G) technology changes that by letting your EV send stored energy back to the grid or your home when electricity prices are high, and recharge when they're low. The result? Lower energy bills, a more stable grid, and potentially even a new income stream.
If you've been wondering how to set up V2G at home, this guide walks through everything you need: the right car, the right charger, electrical requirements, realistic costs, and what kind of savings you can actually expect. For a broader look at the technology behind all of this, check out our complete handbook to vehicle-to-everything for private owners.
What Is V2G and How Does It Work?
V2G allows energy to flow in both directions between your electric vehicle and the electricity grid. A standard EV charger only pushes power into your car. A bidirectional charger can also pull power out of the battery and feed it into your home (vehicle-to-home, or V2H) or back to the grid (V2G).
The basic setup works like this:
- Your EV charges during off-peak hours when electricity is cheap, or from your solar panels during the day.
- During peak hours, when grid electricity is expensive, the bidirectional charger draws energy from your car's battery.
- That energy either powers your home directly or gets exported to the grid, earning you money through feed-in tariffs or grid balancing services.
The charger handles the DC-to-AC conversion, communicates with the grid, and ensures your car still has enough charge for your next trip. You set minimum battery levels and departure times through an app, so you never get stranded.
Step 1: Check If Your Car Supports Bidirectional Charging
Not every EV can do V2G. The car needs hardware and software support for bidirectional power flow. Here are the main options available in Europe right now:
Nissan Leaf (all generations with CHAdeMO)
The Nissan Leaf was the first mass-market EV to support V2G, using the CHAdeMO charging standard. Both the 40 kWh and 62 kWh versions support bidirectional charging. The Leaf has been used in V2G pilots across Europe for years and remains one of the most proven options. The downside is that CHAdeMO is being phased out in Europe in favour of CCS, so future charger availability may be limited.
Volkswagen ID.4 and ID.5 (77 kWh battery, Software 3.5+)
Volkswagen has been rolling out bidirectional charging support for its ID. models built on the MEB platform. Models with the 77 kWh battery and ID. Software 3.5 or higher are technically capable of DC bidirectional charging. VW's energy subsidiary Elli has launched pilot programmes to bring V2G to customers, though wider rollout is still in progress as of early 2026.
Hyundai Ioniq 5 and Ioniq 6
Hyundai's E-GMP platform supports V2L (vehicle-to-load) out of the box, and the company has been expanding into V2G territory. Hyundai launched a V2G pilot in Utrecht with We Drive Solar in 2022, and in late 2025 announced plans to expand V2G services across Europe, starting with the Netherlands. Full V2G capability via DC bidirectional charging is expected to become available to retail customers as charger partnerships mature.
Kia EV6 and EV9
Built on the same E-GMP platform as the Ioniq 5, the Kia EV6 supports V2L. The larger EV9 goes further with V2G and V2H support listed as available capabilities. Like Hyundai, Kia is progressively enabling these features through software updates and charger partnerships.
Other Notable Models
The Cupra Born (V2H, V2G capable), Mitsubishi Outlander PHEV and Eclipse Cross PHEV (both with CHAdeMO V2G support), and various upcoming models from BYD and others are either already compatible or have announced support. The list is growing fast.
Step 2: Choose a Bidirectional Charger
The charger is the most important piece of hardware in your V2G setup. It needs to handle bidirectional power conversion, communicate with both your car and the grid, and meet local safety and grid connection standards. Here are the leading options for European homes:
Ambibox ambiCHARGE
The Ambibox ambiCHARGE is a German-engineered bidirectional DC wallbox built specifically for V2G and V2H from day one. Ambibox is an integration partner of Sourceful Energy, meaning the ambiCHARGE works directly with our energy management platform to optimise charging and discharging based on real-time spot prices, solar production, and grid service opportunities.
- Power output: 11 kW or 22 kW bidirectional (DC)
- Connector: CCS Combo 2 (the EU standard for DC charging)
- Features: Full V2G/V2H/V2B support, ISO 15118 compatible, integrated charge controller, grid compliant
- Compatibility: Supports both 400V and 800V EV architectures
- Best for: European homeowners who want a proven bidirectional charger that integrates with smart energy management
Ambibox has been running a V2G pilot project in Stenberg, Sweden, which is now being expanded nationwide. They've also deployed 200 ambiCHARGE units at Volkswagen dealerships. If you're in the Nordics or elsewhere in Europe, this is currently one of the most accessible paths to a working V2G setup at home, particularly when paired with Sourceful Energy's V2X-compatible EMS.
Wallbox Quasar 2
The Wallbox Quasar 2 is one of the most anticipated bidirectional chargers for the European market. Key specs:
- Power output: Up to 11.5 kW bidirectional
- Connector: CCS (a big advantage over CHAdeMO-only chargers)
- Features: Solar integration, smart scheduling, V2H and V2G modes
- Estimated price: Around €5,500 to €6,500 for the unit (before installation)
- Savings claim: Wallbox estimates up to €1,000 per year in energy savings
The Quasar 2 supports both 400V and 800V EV architectures, making it compatible with a wide range of current and future EVs.
Dcbel r16
The dcbel r16 combines a solar inverter, EV charger, and home battery interface in one unit. It was originally developed with CHAdeMO support and has been adding CCS compatibility.
- Power output: Up to 15.2 kW solar inverter, bidirectional EV charging
- Features: Integrated solar inverter, backup power, smart energy management
- Estimated price: Around $5,000 USD (approximately €4,600), plus installation
The r16 is interesting if you want a single device that handles both solar and V2G, though availability in Europe varies by region.
Indra Smart PRO
UK-based Indra makes smart EV chargers with a focus on the British market. While the Smart PRO is primarily a smart AC charger (7.4 kW) with solar integration and tariff optimisation rather than a full V2G bidirectional unit, Indra has been involved in V2G trials and is worth watching as the market develops.
- Price: From around £385 (approximately €450) for the unit
- Features: Smart tariff integration, solar optimisation, surge protection included
- Best for: UK homeowners looking for smart charging with a path toward V2G
Enphase IQ Bidirectional EV Charger
Enphase is developing a bidirectional charger that integrates with their popular microinverter-based solar systems. It targets up to 11.5 kW of bidirectional power and supports both 400V and 800V EVs.
- Estimated price: $4,000 to $5,000 USD (approximately €3,700 to €4,600)
- Features: Deep integration with Enphase solar ecosystem, GaN-based microinverters
- Availability: Shipping in stages, with European availability expected through 2026
Quick Comparison
| Charger | Power | Connector | Estimated Price | Best For |
|---|---|---|---|---|
| Ambibox ambiCHARGE | 11/22 kW | CCS Combo 2 | Contact manufacturer | Sourceful EMS integration, Nordic V2G |
| Wallbox Quasar 2 | 11.5 kW | CCS | €5,500-6,500 | CCS cars, full V2G |
| Dcbel r16 | 15.2 kW | CHAdeMO/CCS | ~€4,600 | Solar + V2G combo |
| Enphase IQ BiDi | 11.5 kW | CCS | ~€3,700-4,600 | Enphase solar owners |
| Indra Smart PRO | 7.4 kW | Type 2 | ~€450 | UK smart charging |
Step 3: Electrical and Installation Requirements
Setting up a bidirectional charger at home involves more than just mounting a box on the wall. Here's what you'll typically need:
Electrical Supply
Most bidirectional chargers require a three-phase electrical supply for full power output. In many European countries (Germany, Netherlands, Sweden, etc.), three-phase is standard in homes. In the UK, most homes have single-phase, which may limit you to lower power output or require an upgrade.
You'll need:
- A dedicated circuit from your consumer unit/fuse box (typically 32A or higher)
- Adequate supply capacity from your distribution network operator (DNO). For V2G export, you may need to apply for permission to export power
- An earth rod or appropriate earthing arrangement, depending on your local regulations
Grid Connection and Export Permission
This is one of the trickier parts. To send power back to the grid, you need permission from your local grid operator. The process varies by country:
- UK: You need to notify your DNO (e.g., UK Power Networks, SSE, SP Energy Networks) and may need G99 certification for your installation
- Germany: Registration with the Bundesnetzagentur (Federal Network Agency) and your local Netzbetreiber is required
- Netherlands: Notification to your grid operator (e.g., Stedin, Liander, Enexis) is needed
- Sweden: Contact your local grid company (elnätsbolag) for connection approval
In many cases, the charger installer or energy provider will handle this paperwork for you.
Installation Costs
Professional installation typically costs between €500 and €2,000 on top of the charger price, depending on:
- Distance from your electrical panel to the installation location
- Whether you need a supply upgrade (single-phase to three-phase, or higher amperage)
- Local permit and inspection fees
- Additional equipment like CT clamps, energy meters, or communication gateways
Total cost estimate for a full V2G setup:
- Bidirectional charger: €3,500 to €6,500
- Installation: €500 to €2,000
- Supply upgrade (if needed): €500 to €3,000
- Total: approximately €4,500 to €11,500
That's a significant investment, but as we'll see in the savings section, the payback period can be attractive, especially if you have solar panels.
Step 4: Connect to an Energy Management System
To get the most out of V2G, you need software that decides when to charge, when to discharge, and how much energy to keep in reserve. This is where an energy management system (EMS) comes in.
A good EMS will:
- Monitor real-time electricity prices and charge your car when power is cheapest
- Discharge to the grid or your home during peak price periods
- Coordinate with your solar panels to maximise self-consumption
- Respect your driving schedule and minimum battery requirements
- Track revenue from grid services
Sourceful Energy has been working on V2X-compatible energy management, designed to integrate with bidirectional chargers and optimise energy flows automatically. Paired with real-time price data and solar forecasting, an EMS can significantly increase the financial returns from your V2G setup.
Our pilot with Kalmar Energi showed how this works in practice, with real households using V2X to balance their energy consumption.
How Much Can You Actually Save?
This is the question everyone wants answered. The honest answer: it depends on several factors. But we can lay out realistic numbers.
Savings from Tariff Arbitrage
If you're on a dynamic electricity tariff (like Tibber, Octopus, or aWATTar), you can charge your EV when prices are low and use that energy when prices are high. In markets with significant price variation, this can save €300 to €800 per year, depending on your battery size and local price spreads.
Wallbox estimates up to €1,000 annually with the Quasar 2, which is plausible in markets with large peak-to-off-peak price differences.
Revenue from Grid Services
Some grid operators and aggregators pay EV owners to provide flexibility services, like frequency regulation or demand response. Payments vary widely by country and programme, but early V2G participants in the UK and Netherlands have reported earning €200 to €500 per year from grid services.
As the market for flexibility grows (and it's growing fast, as we covered in our analysis of EVs as grid investments), these revenues are likely to increase.
Solar Self-Consumption
If you have rooftop solar panels, V2G (or more precisely, V2H) lets you store excess solar energy in your car battery during the day and use it in the evening. This can reduce your grid imports significantly. For a typical European household with a 6-10 kWp solar system, this could save an additional €200 to €500 per year by avoiding expensive grid electricity.
Realistic Total Savings
Combining tariff arbitrage, grid services, and solar optimisation:
- Conservative estimate: €500 to €800 per year
- Optimistic estimate: €1,000 to €1,500 per year
- Payback period on charger investment: 4 to 10 years, depending on setup costs and savings achieved
These numbers will improve as dynamic tariffs become more common, grid service markets open up, and charger prices come down through competition.
What About Battery Degradation?
A fair concern. Using your car battery for V2G means additional charge cycles, which does cause some extra wear. However, studies have shown that the impact is smaller than many people fear. V2G cycling is typically shallow (10-30% of battery capacity) and managed at moderate power levels, both of which are gentler on battery chemistry than, say, regular DC fast charging.
For more detail on this topic, we've written a thorough guide on how V2X affects your EV battery health.
A Step-by-Step Summary
Here's the process condensed:
- Check your car. Confirm it supports bidirectional charging (CHAdeMO or CCS). Check with your manufacturer for any required software updates.
- Choose a charger. Pick a bidirectional charger compatible with your car's connector and your local grid standards.
- Assess your electrics. Determine if you have three-phase supply and enough capacity. Get a quote from a qualified electrician.
- Apply for grid export permission. Contact your local grid operator or have your installer handle the application.
- Install the charger. Use a certified installer. The process typically takes half a day to a full day, assuming no supply upgrade is needed.
- Set up your EMS. Connect the charger to an energy management platform to automate charging and discharging schedules.
- Configure your preferences. Set minimum battery levels, departure times, and any revenue targets in the app.
- Start saving. Monitor your energy flows and earnings, and adjust settings as you learn your patterns.
What's Coming Next
The V2G market in Europe is moving quickly. The EU's revised Energy Performance of Buildings Directive encourages smart charging infrastructure in new buildings. More car manufacturers are enabling bidirectional charging through software updates. Charger prices are falling as production scales up. And grid operators across Europe are actively designing new flexibility markets that will pay EV owners for their participation.
Within the next two to three years, setting up V2G at home will be about as straightforward as installing a standard wallbox charger today. The early adopters who get started now will have a head start on optimising their systems and building a track record with grid service providers.
If you're considering making the move, the combination of the right car, a bidirectional charger, and an intelligent energy management system is all you need to turn your parked EV into a genuine energy asset.
Want to stay updated on V2G developments and energy management solutions? Follow Sourceful Energy for the latest guides and product updates.
