Mehr Ladeleistung als der Netzanschluss hergibt: Batteriegestütztes Microgrid erschließt neue Potenziale für Schnellladen

More charging power than the grid connection can provide: Battery-buffered microgrid unlocks new potential for fast charging

• High charging power on a 125 kW grid connection thanks to integrated battery storage
• Multiple charging points supplied through intelligent interaction between storage and energy management
• Operating costs reduced by several thousand euros per year through peak shaving and optimized energy procurement

Regensburg/Nürtingen, May 7, 2026 – How can ultra-fast charging be realized where grid connections reach their limits? A microgrid implemented by energielösung GmbH demonstrates how battery-buffered technology from ADS-TEC Energy can decouple charging power from available grid capacity and provide significantly more power than the grid connection itself would normally allow.

The technical concept was examined as part of a master’s thesis at the Technical University of Applied Sciences Ingolstadt. In cooperation with energielösung, a public fast-charging site at Bayernwerk’s headquarters in Regensburg was analyzed over several weeks under real operating conditions. The results provide practical data for the planning and optimization of charging infrastructure.

The setup consists of three fast-charging systems: two conventional hyperchargers (150 kW and 50 kW) and one ChargePost from ADS-TEC Energy with up to 300 kW charging power and an integrated 201 kWh battery storage system. The entire site operates on a grid connection of just 125 kW – a clear bottleneck for conventional fast chargers, whose charging power directly depends on available grid power: 150 kW charging power requires 150 kW from the grid.

The ChargePost works differently. It decouples charging power from the grid connection and can operate on an input power range of just 22 to 87 kW while still delivering up to 300 kW charging power. The additional power is supplied by the integrated battery storage system.

Within the microgrid, the ChargePost takes on a dual role: it not only supplies the connected vehicle, but also actively supports the additional charging points. During periods of high demand, it provides extra power and compensates for peak loads. This allows multiple vehicles to charge simultaneously despite the limited grid connection, while still enabling high charging performance.

Another key factor is system integration: the ChargePost can be integrated into existing energy and building management systems and centrally controlled. Only this coordinated interaction between storage and charging points makes it possible to combine high charging performance, cost efficiency and grid-friendly operation.

This creates clear economic advantages for operators. The need for costly grid expansion can be significantly reduced or even avoided entirely, with project-specific savings of several thousand euros possible.

The effect is also evident in day-to-day operation: because vehicles do not continuously request maximum charging power, the battery storage system can be used selectively. During periods of high demand, the battery provides additional energy. When sufficient grid capacity is available, the storage system is recharged. This enables both high charging performance and high vehicle throughput.

The field test showed particularly strong results in the economic optimization scenario. By reducing peak loads and purchasing electricity at favorable times, operating costs could be significantly reduced – in the analyzed case by several thousand euros per year.