The Mobility House to Offer Free Electricity for V2G Customers

Why It Matters

Free charging demonstrates a viable business model that could accelerate V2G adoption and lower total cost of ownership for EV drivers, while providing valuable grid‑balancing services.

Key Takeaways

• TMH offers free home charging for Renault 5 V2G owners, Q2 2024.
• Model uses arbitrage, selling stored electricity back to grid during peaks.
• 14 h daily V2G can make 10,000 km charging cost zero.
• E.ON credits $0.26 per hour and $0.44 per kWh for BMW iX3.
• Octopus/ BYD UK plan costs $374/month for V2G car, wallbox, electricity.

Pulse Analysis

The Mobility House (TMH), a Munich‑based pioneer in bidirectional charging, announced a consumer‑facing program that eliminates electricity bills for owners of vehicle‑to‑grid (V2G) capable electric cars. Starting this quarter, Renault 5 drivers who install TMH’s V2G‑enabled wallbox will receive free home charging, while the company plans to roll the offer out to Mercedes‑Benz’s CLA and GLC models later in the year. TMH’s pitch hinges on using the car’s battery as a short‑term storage unit that can discharge power back to the public grid when wholesale rates spike, thereby offsetting the cost of the electricity drawn to charge the vehicle.

The economics rely on arbitrage: TMH purchases cheap off‑peak electricity, stores it in the vehicle, and sells it at higher peak prices. In Germany, a regulatory change at the start of 2024 re‑classified EV batteries as stationary storage, removing a double grid fee and making the arbitrage loop profitable. Similar schemes are emerging elsewhere; E.ON’s tariff for the BMW iX3 credits roughly $0.26 for every hour the car stays plugged in and $0.44 for each kilowatt‑hour discharged, capped at $66 per month. In the United Kingdom, Octopus Energy bundles a BYD V2G vehicle, wallbox and electricity for about $374 a month, provided the car is connected at least twenty times for twelve‑hour intervals.

If TMH’s model scales, the prospect of “free‑charging” EVs could dramatically lower total cost of ownership and accelerate mass adoption, while delivering valuable grid‑balancing services that support renewable integration. However, widespread success depends on sufficient V2G‑compatible infrastructure, clear market signals for price differentials, and consumer willingness to keep cars plugged in for long periods. As utilities and automakers experiment with similar tariffs, the coming years will reveal whether V2G can transition from a niche pilot to a mainstream revenue stream for both drivers and grid operators.