Merus Power

EV charging
stations

Customer challenges
in electric vehicle charging stations

The Fast DC charging of electric vehicles has emerged as a vital solution to promote the widespread adoption of EVs in highway transportation and heavy-duty fleets. It is considered one of the most crucial ways of charging due to its ability to provide rapid charging capabilities. However, the success of implementing fast chargers in large volumes relies heavily on power quality and the reliability of the electrical network.

To ensure a smooth and efficient charging experience, it is essential that the charging infrastructure meets the standards set for power quality. As the number of fast charging stations continues to grow, there is a potential issue of voltage violations, reactive power, and harmonic distortion limits being exceeded set by local grid code. This situation emphasizes the significance of power quality management in maintaining a stable and reliable electrical network.

Moreover, the importance of power quality management is expected to significantly increase as more and more Electric Vehicles enter the market. With a higher demand for fast charging capabilities, it becomes crucial to maintain optimal power quality to prevent any potential negative impacts on the electrical grid. For example, the presence of excessive harmonic content generated by chargers can pose challenges in connecting the charging station to the grid due to power quality standards enforced by the grid.

Merus® Solutions improving power quality
in electric vehicle charging stations

  • Smooth operation
  • Longer lifetime of equipment and components
  • Reduced maintenance costs
  • Ensured compliance with electricity grid standards and regulations

Benefits of Merus® ESS Energy Storage
in electric vehicle charging stations

  • Improved stability of the electric grid
  • Easy integration of renewables
  • Lowered energy costs
  • Ensured compliance with electricity grid standards and regulations

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EV charging stations face a common challenge where the combined power of the chargers typically surpasses the allowable maximum load for the transformer in the design phase. As a result, it becomes necessary to have the ability to limit the charging power when all chargers are in use. However, by incorporating a battery energy storage system into the fast-charging station, there is no longer a need to limit the maximum charging power on an individual charger basis. This breakthrough enables faster charging times, leading to enhanced customer satisfaction and increased revenue for the charging station operator.

When an existing charging station is linked to the grid and reaches its maximum capacity, it gets denied new connection permission and is unable to accommodate additional chargers. This obstacle may be overcome by expanding the grid, but this can prove to be rather expensive. A more economical alternative is enhancing the grid with a battery energy storage system. Merus Power’s battery energy storage system features a modular design that seamlessly adapts to the number of chargers, and its compact structure allows the modules to be effortlessly connected to the same transformer.

Additionally, Merus® ESS can have other revenue streams such as energy market arbitrage and power market for frequency regulation, which lowers the return on the investment (ROI) on the system level of the entire charging station.

Merus® Solutions for electric vehicle charging stations

Merus® A2 – Active Harmonic Filter

Merus® A2 is a scalable, versatile, and durable active harmonic filtering solution designed and manufactured in Finland using innovative Merus® technology.

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Merus® ESS – Energy storage system

Merus® Energy Storage System is a scalable lithium-ion battery energy storage system fully designed by Merus Power.

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