Siemens and Aral advance e-mobility - International Burch University
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Siemens and Aral advance e-mobility

Aral AG has tasked Siemens with expanding the grid connection at 30 selected petrol stations for accommodation of e-mobility requirements. Hence, the installation of intelligent substations allows Aral to upgrade these stations with ultra-fast charging technology for electric vehicles.

The expansion of the public charging infrastructure is an essential requirement for the acceleration of electric mobility. Accordingly the joint project between Aral and Siemens is an important contribution to creating public, fast-charging stations.

“By equipping our gas stations with charging infrastructure for electric vehicles, we are taking a major step forward in creating the gas station of the future,” said Patrick Wendeler, member of the Managing Board of Aral. “To make charging as fast as putting fuel in your car, we have opted for ultra-fast charging stations with a power of up to 350 kW. But chargers alone are not enough: the retrofit also requires a powerful and reliable grid connection. That is why we are glad to have Siemens with its expertise in electrical infrastructure at our side.”

Most petrol stations currently only have a low-voltage connection. Therefore, to meet the power demand of fast chargers, the grid connection needs to be upgraded to a medium-voltage connection. This is achieved through the substations, which connect the petrol stations’ charging infrastructure to the public power grid. Each substation consists of a hermetically encapsulated transformer, a gas-insulated medium-voltage switch-gear and low-voltage switchboard.

By using communicating hardware and Internet of Things technology (IoT), Aral can easily obtain information about the substations status. This will enable Aral to guarantee the full functionality of its ultra-fast charging stations even better than today. The utilization of sensors helps to generate data, thereby ensuring continuous monitoring of a safe operation of the equipment. These values are then transmitted over communication interfaces to a higher-level, cloud-based IoT system. The data is evaluated and visualized via a web application in a useful addition to those of the fast charging stations.

“This intelligent substation not only allows Aral to introduce ultra-fast charging technology, but also ensures highest reliability and better grid utilization within the existing infrastructure,” said Stephan May, Chief Executive Officer of Distribution Systems, Siemens. “Real time data monitoring enables optimal usage of the assets. For this reason, digitization is an important prerequisite for efficient load management and to optimize the use of power resources.”

Aral operates all ultra-fast charging stations on its own. They supply 100% green power. Assuming the appropriate battery technology is provided, the electric vehicle can be fully recharged within 10 minutes to a range of up to 350 km.

The rollout of high-power chargers at Aral gas stations in Germany is part of bp’s strategy to increase the number of charge points. Globally, operated charging points will be increased from 7000 in 2020 to 70 000 in 2030.


Department of Electrical and Electronics Engineering