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Intelligent charging and storage - get started with modern electromobility

Bidirectional charging and storage solutions for your infrastructure

Whether it's an apartment block or a commercial site: with sun2wheel, you can make optimum use of the sun for your electrical infrastructure. The intelligent charging and storage system from sun2wheel is compatible with all electric vehicles and can be expanded as required.

Our sustainable battery storage systems and intelligent charging stations enable the connection for self-consumption (ZEV) as well as simple fleet management. With optimised energy use and peak shaving, you save costs in the long term: for a secure investment in the future.

Your advantages with sun2wheel

With bidirectional or intelligent monodirectional charging from sun2wheel, you can optimise your energy and load management. Networking and control of all system elements enable a combination for self-consumption (ZEV) for simple billing. The intelligent software automatically controls charging and discharging processes and optimises energy use and load management. Everything can be easily controlled via an app with user management for owners, administrators and caretakers. Individual preferences of those involved can be customised directly in the app. The bidirectional charging stations are easy to install via plug & play and can be expanded modularly. All products are developed and manufactured in Switzerland and are of the highest durable quality. Remote maintenance, automatic updates and our professional service ensure smooth operation and minimise costs. We also offer customised financing solutions with our partners.

sun2wheel | Your advantages with sun2wheel

Our answers to your questions

What is bidirectional charging?

In bidirectional charging, the vehicle battery is used as an intermediate storage of electrical energy (e.g. to store surplus solar power). In contrast to monodirectional charging, which is still common today, a bidirectional charging station can be used to feed electrical power and energy back into the building (V2H/V2B) or the electrical supply network (V2G) as required.

Explanation: V2G (vehicle-to-grid)

Bidirectionally chargeable e-cars can not only draw electrical energy from the grid, but also feed it back into the grid as part of a smart energy system. This process is controlled by signals from the distribution or transmission system operator and can take place both at public charging stations and inside buildings via the grid connection. The V2G charging and discharging operations of a larger number of e-cars (pooling) serve as services in both the distribution and transmission grids for energy trading and stabilization purposes. Vehicle-to-grid thus enables smart sector coupling.

When is bidirectional charging permitted in Switzerland?

In principle, bidirectional charging is equivalent to the operation of stationary batteries. If the charging infrastructure complies with the VSE recommendation on grid connections for energy generation systems (NA-EEA) and the technical standards for electrical safety and electromagnetic compatibility, it can be authorised when registering with the distribution grid operator.

From 1 January 2022, bidirectional charging stations can be registered regularly with an updated technical connection application (TAG).

Which cars can charge bidirectionally?

The following vehicles are enabled for bidirectional charging as of February 2024:

  • Honda: Honda e > read more
  • Nissan: Leaf (from 2014), Evalia and e-NV 200
  • Mitsubishi: i-MiEV, Outlander and Eclipse Cross > read more
  • Peugeot iOn and Citroën C-Zero

 

Listed are all vehicles that allow vehicle-to-home via a suitable charging station. Vehicle-to-load, such as the Hyundai Ioniq 5, must be considered separately. Here, you can only draw a limited amount of power via an onboard plug (single-phase, up to 3.6 kW), but you cannot supply a house with electricity.

Further information: In principle, all Japanese electric vehicles can charge bidirectionally because this is mandated by the Japanese government. So far, bidirectional charging is primarily possible for vehicles with CHAdeMO plugs. The Honda e is an exception, it can do bidirectional charging via the CCS plug. Bi-directional charging requires approval from the vehicle manufacturer and certification of the charging station for the specific vehicle type.

Several vehicle manufacturers have announced that their vehicles will be enabled for bidirectional charging in the near future. In general, the introduction of an international standard ISO 15118-2020 is expected by 2025, which will also regulate bidirectional charging with CCS charging plugs in a binding manner.

What do bidirectional charging stations mean for the existing power grid infrastructure of the building in question?

The intermediate storage and targeted feeding back of self-produced solar power increases the self-consumption rate of a property or an area with a photovoltaic system and thus reduces the purchase costs of electrical energy.
The bidirectional connection of vehicles also makes it possible to reduce power peaks by discharging the batteries in a load-controlled manner. This regenerative power supply results in a reduction of grid costs for the user through savings in the power tariff.
With a larger number of vehicles feeding back, the charging capacity of the charging infrastructure can even be raised above the capacity of the installed connected load.

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Your advantages at a glance:

Optimize operating costs
Intelligent software controls the entire system so that energy costs and total cost of ownership (TCO) are minimal.

Modular and flexibly expandable.
The system can be expanded at any time with additional charging stations and battery storage units.

System control and fleet management via app.
Fleet management and control of the system is carried out via a simple and clear app

Bidirectional charging with CSS plug.
Our system offers true bidirectional charging and is optimized for V2X operation.

Robust 2nd-use Battery Storage.
The specially processed car batteries are a sustainable solution for electricity storage.

Advice and straightforward installation.
Competent consulting, planning, installation and maintenance by us and our partners.

Reliable and safe
High quality guarantees constant reliability and meets all safety standards.

Innovation Swiss Made
Innovative technology for eMobility developed and manufactured in Switzerland.

Which charging solution is right for you?
Find the right product for you here.