Electric mobility offers increasing flexibility potential for electrical energy systems, particularly through controllable charging processes. This paper quantifies the cost-reduction potential of optimized charging for the specific case of employee charging at a company site with 30 charging points, using historical charging data spanning 1.25 years. The analysis focuses on behind-the-meter use cases, including dynamic electricity tariff optimization, photovoltaic self-consumption optimization, peak shaving, and their combined application.

The results show that optimized charging can significantly reduce charging-related costs compared to uncontrolled charging. Individual use cases already provide measurable savings, while combined optimization achieves cost reductions of up to 40%. In the investigated employee-charging case, bidirectional charging provides only limited additional benefits due to short dwell times and grid fee structures. However, bidirectional charging has the capacity to yield further value when integrated with additional local loads, such as those from buildings or production sites, and may offer broader potential in other application contexts.