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Guide to electromobility

Charging stations - basics


In order for you to be able to bill guests for the charged electricity, for example, charging stations installed by us are connected to back-end software for billing in compliance with weights and measures regulations. This means that only the amount of electricity that was actually used is billed. The publicly accessible charging stations are also accessible to third-party charging stations. Roaming works in a similar way to mobile phone providers.

Definition: AC (alternating current) and DC (direct current)

Electric vehicles are charged with direct current (DC). Alternating current (AC) from the distribution grid must be converted by a rectifier. When this is done in the vehicle, it is called AC charging. If, on the other hand, rectifiers are installed in the charging station, charging can be carried out via DC at higher powers.

Funding requirements and charge station ordinance

Public charging points must be supplied with renewable electricity for at least six years. The charging point ordinance requires barrier-free, public charging. This means that the charging points must have corresponding devices ( e.g. QR codes).

Charging stations & charging points:
  • A charging station can have several charging points to charge several vehicles at the same time

Our recommendation: One charging point per vehicle saves swapping around.

Charging power and duration

With a charging power of 3.6kW, an electric vehicle will still only charge with a maximum of 3.6kW at a 22kW charging station. The approximate charging time is obtained by dividing the battery capacity (kWh) by the charging power (kW). Efficiency, charging status, temperature and the age of the battery also influence the charging performance.

Load management

Intelligent load management avoids expensive load peaks and reduces the costs for the grid connection. Smart load balancing when charging the company fleet can save between 30 and 70 percent of energy and infrastructure costs. Here, integrate storage and in-house consumption or through a carport.



Our charging stations are connected to a modern back-end software that documents charging processes and costs. Unexpected changes as well as malfunctions are detected and rectified.


Choice of location, intended use and space requirements

Define the application purposes for the charging infrastructure. This often results in the choice of location for the charging station, e.g. underground car parks, the forecourt of the town hall etc. Wall boxes can be mounted directly on the wall or free-standing.

Ensure a future-proof location by laying additional empty pipes for subsequent expansion.


Connector types

Charging station and vehicle must be compatible. Electric vehicles are equipped with different plug systems. In Europe, the three-phase Type 2 plug has been set as the standard. Most public charging stations are equipped with a Type 2 socket.

The CCS plug supplements the Type 2 plug with two additional power contacts for a fast charging function and supports AC and DC charging (alternating current and direct current charging). CHAdeMO plug: This fast charging system was developed in Japan and allows charging up to 100 kW. However, 50 kW is the maximum power rating at most public charging stations.


Why have your own change station?
  • Unlike normal household sockets, charging stations protect against overloading and heat generation and the charging power is higher.
  • In ideal circumstances the charging time is reduced to 30 minutes for a complete charge.

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