Based on our comprehensive graphical and written evaluations, our electrical specialists can develop an energy management concept for your system. We analyze – you operate!
Charging stations in parking garages and office parking lots
The rise of electromobility is leading to a growing demand for charging stations outside of private areas. There is a growing desire to install charging stations in parking garages and office parking lots. This often raises the question of whether the existing electrical connection has sufficient power reserves or whether there is a risk of power overload.
Example of a performance measurement
To illustrate this, let's take an example project in which we carried out a performance measurement.
Figure 1 shows the power consumption of a typical office building (approximately 200 employees) with typical consumers, operating conditions, and cafeteria operations. The red limit line at 200 A corresponds to the fuse protection of the building connection.
Figure 1: Time course of electricity consumption
The clearly visible midday peak is already putting a full strain on the main fuse. However, it is clear that there is still free capacity most of the time, allowing for easy charging of electric vehicles.
Table 1 provides an overview of typical charging stations and their power consumption.
In our example, parallel operation of 5 Type 2 charging stations with 11 kW charging power would be possible most of the time.
| type | Charging power | Electricity consumption |
|---|---|---|
| Type 2 | 11 kW / 22 kW / 43 kW | 16 A / 32 A / 63 A |
| CCS | 50 kW | 72 A |
| CHAdeMO | 22 kW / 50 kW | 32 A / 72 A |
| Supercharger | 135 kW | 200 A |
Table 1: Overview of typical charging stations
Modern charging systems usually offer the option of active load management in order to optimally utilize the free capacity of the house connection.
We analyze and you operate!
It is obvious that performance measurement must be carried out as a basis for the planning of charging stations.
PQ ENGINEERING has high-quality mobile network analyzers and specially trained personnel who, wearing appropriate protective equipment, can carry out measurements without the need to disconnect the connection.
Based on our comprehensive graphical and written evaluations, electrical specialists can develop an energy management concept for your system.
In addition, when evaluating your measurement, we assess the local network quality and draw your attention to possible sources of interference in your network.
Figure 2: Conducting a performance measurement
