Source - Power Circle V2X Synthesis 2024
Industry synthesis report from Power Circle — the Swedish EV industry association. Provides a comprehensive technical and regulatory overview of V2X technology specifically for the Swedish market.
Title: V2X synthesis (factsheet/report)
Publisher: Power Circle (Swedish EV industry association)
Year: 2024
Pages: 18
Character: Industry synthesis — comprehensive, Sweden-focused, accessible format
Key numbers
| Metric | Value |
|---|---|
| Swedish EV fleet total battery potential | 114 GWh |
| Potential capacity from 1 million vehicles @ 10 kWh available each | 10 GW |
| EV stationary share of lifetime | ~96% |
| Projected V2G adoption (Swedish fleet) | 2% by 2025 / 10% by 2030 / 100% by 2050 |
V2X taxonomy
V2X (Vehicle-to-Everything) — the overarching concept for bidirectional energy transfer from an EV to any external system. Sub-categories:
| Term | Meaning |
|---|---|
| V2G | Vehicle-to-Grid — discharge to the electricity grid via a distribution connection point |
| V2H | Vehicle-to-Home — discharge to the household’s own consumption |
| V2B | Vehicle-to-Building — discharge to a commercial/industrial building |
| V2L | Vehicle-to-Load — direct output to portable devices or equipment (e.g., camping, emergency power) |
| V2V | Vehicle-to-Vehicle — direct transfer between EVs |
Technology description
Requirements for V2G: bidirectional EV charger (wallbox or EVSE) + active inmatningsabonnemang (grid injection subscription) at the grid connection point. The wallbox and vehicle communicate via ISO 15118-20 (bidirectional charging protocol) and the charger backend communicates via OCPP 2.1 (Open Charge Point Protocol).
AC vs DC bidirectional charging:
- AC: inversion (AC↔DC conversion) handled inside the vehicle’s OBC (on-board charger); wallbox is cheaper; but AC V2G protocols are less mature — AC standard does not include state-of-charge in the communication layer
- DC: inversion handled in the external charger; wallbox is more expensive; better communication protocol maturity (ISO 15118 DC channel is more developed)
Swedish regulatory status
No direct legal obstacles to discharging energy from an EV battery into the electricity grid. However, it is a legal grey area with several unresolved issues:
- Classification ambiguity: V2G can be treated as either (a) microproduction facility (as explored in the PAVE pilot — treating the EV as equivalent to solar panels); or (b) mobile injection point. Each classification has different regulatory implications. Microproduction treatment means: changing the vehicle requires updating permits and registrations.
- Double taxation (dubbelbeskattning): electricity charged into the EV battery incurs energiskatt + moms; electricity discharged via V2G to a subsequent customer is taxed again. Skatteverket allows a refund of the energy tax for electricity fed back to the grid — but only when returning electricity to the same concessionary network (koncessionsområde) where it was fed in. Charging in one area and discharging in another eliminates the refund right.
- Physical address registration: a registered fixed physical address is required by Svk for participation in ancillary services and by DSOs for flexibility market participation. Mobile resources (EVs) cannot easily comply. This limits V2G to a single registered location without re-registration.
- Grid code adaptation: nätkoder (network codes) have not been adapted for mobile resources. The grid does not have established procedures for a resource that changes location.
Conclusion: V2G is legally feasible but grey-area. Current pilots operate under workarounds (microproduction classification, location-specific registration).
Swedish pilots
| Pilot | Operator | Description |
|---|---|---|
| PAVE | Göteborg Energi | Tests microproduction classification for V2G; EV treated as production facility like solar panels |
| V2X-MAS | Various | V2X in multiple use cases |
| PEPP | Various | V2G pilot project |
| SCALE | Various | Scale-up pilot |
| Vattenfall/Energy Bank/VW | Vattenfall + Energy Bank + VW | ~200 bidirectional chargers SE3/SE4, 2026–2028 (see Source - Vattenfall Energy Bank VW V2G Pilot 2025-2026) |
OEM readiness (Sweden-relevant)
V2G-capable or V2G-preparing OEMs in the Swedish market: Volvo, Polestar, Volkswagen (ID. models 77 kWh+), Ford, Hyundai.
Key claims
- The Swedish EV fleet has enormous latent flexibility potential (114 GWh, 10 GW at 1M vehicles) that is largely inaccessible due to regulatory and business model gaps.
- The legal framework needs updating in three areas: double taxation removal for cross-area V2G, mobile injection point definition, and network code adaptation for mobile resources.
- ISO 15118-20 and OCPP 2.1 are the emerging international standards that Swedish deployments should align with.
- V2X adoption projections suggest mass adoption will require a decade of policy development and ecosystem building.
Relevance
Authoritative Swedish industry overview. Primary source for market potential numbers, Swedish pilot inventory, and regulatory grey area analysis in Vehicle-to-Grid. Referenced by the KTH thesis as a key secondary source, which validates its standing as the canonical Swedish V2G industry reference.