Polestar is joining stakeholders in the electricity grid sector with a large-scale vehicle-to-grid (V2G) project in Gothenburg, Sweden, funded by the Swedish Innovation Agency Vinnova and piloting a large fleet of Polestar 3 cars.

Together with Swedish National Grid authority Svenska kraftnät, local grid owner Göteborg Energi Nät, regional energy distributor Vattenfall Eldistribution, home charging provider Easee, and research partner Chalmers University of Technology, Polestar aims to find potential business models for V2G and trial tangible use cases that can be scalable and applicable across regions.

At the same time, Polestar is forming a collaboration with the California Energy Commission and the independent, non-profit energy R&D institute EPRI, on a pre-study—also funded by Vinnova—to create a roadmap for the implementation of vehicle-to-grid services in California.

Bidirectional charging technology allows Polestar 3 cars to not only charge but also discharge energy from their batteries back to the individual home or the electricity grid. To help manage V2G integration, Polestar is developing a Virtual Power Plant (VPP) that links all participating Polestar 3 cars connected to the grid. The cloud-based VPP calculates the collective capacity of connected batteries and initiates charging or discharging based on grid demand and battery longevity optimisation. This will allow car owners to both contribute to the energy transition and monetise their EV while it’s parked, without any intervention.

The owner simply plugs in their vehicle and the VPP and smart charging tech will do the rest—optimizing battery use for their transport needs and support the grid.

With V2G solutions, EVs have the potential to become an important flexible energy resource and support electricity grids, beyond already being a means for more sustainable transportation.

Accelerated electrification of mobility, and industry paired with an expansion of renewable electricity, puts higher demands on the available capacity in electricity grids. Production from variable energy sources, such as wind and solar, is dependent on weather and cannot easily be planned and matched to demand. To avoid extensive and costly investments in grid expansion and reinforcement, there is a need for flexible energy storage to help balance supply and demand.

As EV adoption continues to grow, EV batteries can become a useful existing storage solution for both national, regional, and local grids.

The Gothenburg pilot project’s test phase is planned to commence in Gothenburg during the first half of 2024 and run for two years. The pilot will include a large fleet of Polestar 3 cars, aiming to become one of Europe’s largest V2G pilots, featuring essential representatives from national and local energy infrastructure.

The California pre-study begins in December 2023 and runs until October 2024.