The national roadmap for electric mobility in Switzerland is the new, large-scale guideline to advance plug-in vehicles (BEV and PHEV). On May 16, 2022, 59 companies and organizations together with Federal Councillor Simonetta Sommaruga signed the roadmap including the measures developed for it, among them sun2wheel AG. Sandro Schopfer and Marco Piffaretti were present on behalf of sun2wheel AG.
The Roadmap Electromobility 2022 was initiated by DETEC in 2018. The activities of the roadmap are coordinated by the Swiss Federal Office of Energy (SFOE) and the Federal Roads Office (FEDRO). By 2025, plug-in vehicles should account for at least 50% of new registrations and more than 20,000 public charging stations should be in operation. In order to advance the electrification of mobility, a total of 75 concrete measures have been developed.
Sun2wheel is a central actor of the roadmap and is the carrier of the measure for bidirectional charging.
Below the full text of the defined measures of sun2wheel:
Measure “Pilot project: Relieving the load on the power grid through bidirectional charging (V2G)” by sun2wheel
Pilot project: Relieving the strain on the power grid through bidirectional charging (V2G)
The benefits of electric cars go well beyond sustainable personal mobility. Through bidirectional charging (V2G – vehicle to grid), electric car batteries can help prevent power shortages. This also benefits electric car owners. In order to control the V2G functionalities according to the needs of the distribution grid operators (DSOs), four uniform states (charging power without limitation, reduced charging power, minimum charging power, maximum grid unloading = maximum V2G feedback) are defined, and tested in a pilot project.
Detailed description: Regulation of charging stations by VNB: e-mobility becomes grid-serving thanks to V2G.
Swiss TSOs and their association VSE plan to control charging stations (unlike other energy consumers) by an ON/OFF signal. It is specifically about chapter 12 of the plant regulations, and the planned revision to mid-2022, which is being pushed by Switzerland (VSE) together with Austria and the Czech Republic via ripple control communication, and is also being pursued by Germany (via another communication channel). Many Swiss DSOs have already implemented “load shedding rules”, and SIA2060 also references them. Since load interruptions have not yet been activated often in everyday life, no complaints from users are known yet. But these regulations could soon become an issue for electromobility, especially as more electric cars enter the market. The difference introduced in the revision to the previous factory regulations is only that the charging stations must have an ON-OFF input which then shuts down the charge in an orderly manner via IEC61851, instead of simply disconnecting the charging stations from the power supply (as was common before).
If electric vehicles -which, like all other cars, are statistically primarily “stationary vehicles”- would serve the grid, their contribution to grid stability could be very welcome and at the same time generate additional revenue for the owners of electric vehicles: more and more bidirectional electric vehicles can already -thanks to V2G- relieve the grid instead of burdening it!
The goal of our Roadmap2025 measure is to standardize and enable such bidirectional control: for systems with bidirectional charging stations, two ripple control contacts (instead of one) are to be implemented so that the following 4 states (especially the fourth) can be actively controlled remotely by the DSO:
OFF-OFF: Charging power without limitation
OFF-ON: Reduced charging power
ON-OFF: Minimum charging power
ON-ON: Maximum grid unloading (= zero charging power or, if possible, maximum V2G recovery).
The measure foresees that we implement this concept (starting in 2022) in reality (in one or more Swiss communities) (including compensation model) to prove that it brings benefits to all parties, both technical and economic. We are planning concrete pilot projects with (already certified) solutions from sun2wheel, and are looking for partners throughout Switzerland.
It would be desirable if this V2G measure would be supported by several TSOs (but also municipalities that want to promote this V2G solution).