Intelligent and economical charging stations
The electrification of fleets and operating processes is becoming increasingly important. Energy suppliers, companies with vehicle fleets, filling station operators, retailers, local authorities etc., but also smaller companies, are faced with the challenge of setting up a reliable and efficient charging infrastructure.
Why charging stations and battery storage are crucial
Charging stations are more than just charging stations for electric vehicles. They form the backbone of sustainable and economical electromobility. Fast-charging stations (HPC) in particular, with charging capacities of 400 kW or more, enable fast charging times and ensure high availability in commercial fleets and public charging parks.
Battery storage systems complement the charging infrastructure perfectly by absorbing load peaks, optimizing the self-consumption of self-generated solar power or buffering low grid connection capacity and thus helping to avoid expensive grid connection expansions. Thanks to battery storage, the charging infrastructure can be operated reliably even when grid connection capacity is limited.
What types of charging stations are there?
- AC charging stations (alternating current): Ideal for the workplace and private use with charging capacities of up to 22 kW
- DC charging stations (direct current): Perfect for commercial fleets and public charging parks with charging capacities from 50 to 100 kW
- HPC charging stations (direct current, high power charging): Enable ultra-fast charging with up to 400 kW or more, ideal for e-trucks and fast-charging parks.
Legal requirements and obligations for charging stations
Since 2025, commercially used buildings with more than 20 parking spaces have been obliged to provide at least one charging point (GEIG). This affects employers, project developers, local authorities and all operators of large parking areas, among others. Not only must charging points be installed, but their energy supply must also be managed intelligently and sustainably.
Mastering the challenges of grid connection
The increasing number of charging points, especially fast charging points, places high demands on the grid connection capacity. The existing grid connection is often not sufficient to charge several vehicles simultaneously at high power. Grid connection extensions are expensive, time-consuming and often associated with supply bottlenecks for relevant components, such as transformer stations.
Efficient solution: battery storage and load management
Battery storage systems from Voltfang act as a buffer and enable intelligent load management. They reduce grid connection costs, prevent peak loads and ensure economical use of the charging infrastructure. This allows companies to start operating charging stations more quickly and generate additional revenue.
Advantages for companies when installing charging stations
Battery storage systems from Voltfang act as a buffer and enable intelligent load management. They reduce grid connection costs, prevent peak loads and ensure economical use of the charging infrastructure. This allows companies to start operating charging stations more quickly and generate additional revenue.
References for charging station infrastructure
Renewable energies are not only a commitment to sustainability,but also a smart financial decision when combined with energy storage. Explore our case studies to see how businesses are using battery storage to save costs, energy, and emissions.
Further use cases for increasing energy efficiency
Every company has individual power supply needs. Depending on the circumstances, one or more use cases may apply to the use of commercial storage systems. Our team of experts can help you identify the right use cases and match them to your data to ensure your energy efficiency is optimized.
FAQs – Planning and implementing the charging infrastructure
The number of charging points depends on the size of the fleet, the daily routes and the availability of charging times. For fleets with many vehicles that are charged during the day, it makes sense to have more charging points with a higher output. For employee charging stations, individual AC charging points with up to 22 kW are often sufficient. Fast charging points (DC/HPC) are useful if vehicles need to be charged quickly at short notice.
AC charging is suitable for longer downtimes (e.g. at night or during working hours).
DC fast charging is required for fleets with a high degree of utilization or short-term charging.
HPC stations offer maximum power for e-trucks or fast-charging parks.
Charging points should be installed where vehicles are parked for long periods of time (e.g. company premises, employee or customer parking lots).
- Hardware: Charging stations
- Installation: civil engineering and electrical work
- Grid connection
- Battery storage: investment depending on capacity and technology
- Electricity consumption: Dependent on load volume, varies according to tariff
- Maintenance: Regular inspections, repairs, software updates (approx. 5-10 % of investment costs per year)
- Software licenses: the costs for the Voltfang energy management system are already included
Yes, there are funding programs at federal, state and municipal level, e.g. from the Federal Ministry for Digital and Transport (BMVI) or KfW funding. Regional programs also support the expansion of charging infrastructure.
Profitability results from investment costs, ongoing operating costs and income (e.g. electricity sales, state subsidies). Factors include charging volume, electricity tariffs and possible grid fee savings through load management. Voltfang offers an individual profitability analysis for each individual case.
Load management systems control the charging power dynamically so that the grid capacity is used optimally without generating peaks. Battery storage systems from Voltfang with intelligent control reduce grid loads and costs.
The charging infrastructure is connected to either the low-voltage or medium-voltage grid, depending on the charging capacity and location. Grid connections must be professionally planned and approved by grid operators.
- IEC 61851 (charging protocols)
- ISO 15118 (communication between vehicle and charging station)
- OCPP (Open Communication Protocol for Charging Points)
- Safety and billing standards (e.g. charging station ordinance, LSV)
Voltfang’s energy management system controls user administration, load control, billing, monitoring and remote maintenance.
Intelligent systems such as Volfang’s energy management system feature remote monitoring that detects and reports faults at an early stage. Fast maintenance, replacement devices or service teams prevent downtime.
- Approval under building law (in many cases approval-free, varies from region to region)
- Special use permits for public areas
- Grid connection approval by the grid operator
Yes, since 2025, commercially used buildings with more than 20 parking spaces must provide at least one charging point. In addition, requirements regarding technical equipment and accessibility must be met.
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