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Charging States

What does Satellite Unit (Satellite Charger) mean?

Updated March 2026

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Explanation

A satellite unit is a charging dispenser that does not contain its own power electronics. Instead, it receives DC power from a central power cabinet through a cable. The satellite has a screen, a connector, and communication hardware, but the heavy power conversion happens elsewhere.

This design is popular for sites that need many charging points but want flexibility. One power cabinet can serve 4 to 8 satellite units, dynamically distributing power based on which cars are connected and what they need. If only one car is charging, it can receive the full cabinet output. As more cars plug in, power is shared.

Satellite systems are visually distinctive. The dispensers are smaller and more compact than all-in-one chargers. You might see them on slim poles or wall-mounted units. Kempower is a well-known manufacturer of satellite charging systems. The advantage for drivers is that these installations often offer more stalls, reducing the chance of all chargers being occupied.

For current specifications, see CharIN e.V.

Where you'll see this

  • On the charger screen

Common confusion

Satellite units may look less powerful than large all-in-one chargers, but they can deliver the same speeds. The power capacity depends on the central cabinet, not the size of the dispenser you see.

Example

A Kempower satellite system with a 600 kW power cabinet and 6 satellite units can deliver up to 400 kW to a single car, or distribute power across all 6 based on demand.

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From Finn, engineer: Understanding charging terminology helps you troubleshoot faster at the charger. These definitions are based on industry standards and our consulting work with automotive manufacturers.

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