The Charging Projects publishes free performance calculator for AC charging points

The consulting firm The Charging Projects has developed an AC power calculator as an online tool and makes it available free of charge. This tool allows contractors and end customers to view the available connected load at the location where a charging station is planned to be installed. The calculator takes into account both connection expansions and limitations due to the use of existing infrastructure. This facilitates professional communication in the planning and sales of projects for the development of electric vehicle charging infrastructure.

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Planners and operators often face the question of how many electric cars can actually be charged using the existing grid connection. The question of the charging capacity for each car is also relevant for realistically calculating the charging speed. The power calculator can answer these questions.

Freely set variables

With the calculator, planners and installers can display load assumptions, connected load, and bottlenecks in the grid. They can visualize these based on the existing grid connected load or simulate them with an increase in connected load. They can also modify other variables. They start with standard assumptions, such as calculating how much energy is consumed during charging and in what time. They can then freely adjust these variables to determine the optimal size of the charging infrastructure. They can also calculate the utilization of the available power using dynamic and static load management.

Special on electromobility: Smart charging of electric cars for private and business use

Performance data calculated

The tool works based on known connection data and load profiles. If these are missing, it can also draw on proven estimates and empirical values. For example, the performance calculator for multi-family buildings can provide a rough forecast based on the number of residential units using standardized load curves. The evaluation of 37 measurements in multi-family buildings conducted by the developers revealed that the planned power according to DIN standards was only utilized at seven percent. The peak power also averaged 43 percent of the grid connection power.

Electric cars charge houses

Designed for residential buildings

The power calculator is primarily designed for residential charging infrastructure, but can also be adapted to many other usage scenarios. This also allows for the design of charging infrastructure for commercial businesses. However, planners must determine the connected load and consumption themselves. The power calculator has limited use for DC charging parks.

The performance calculator is available on The Charging Project website . (see below)