On-board charger OBC 22K
Compact and efficient high-voltage charging up to 850 Volt.

Thanks to the state-of the art SiC switching technology, the REFUdrive on-board charger is particularly efficient and achieves an efficiency of over 96 %. The device is water cooled, it allows a very wide ambient temperature range. The device contains a galvanic separation.

Flexibly scalable and configurable.

The on-board chargers can be configured in parallel and are therefore scalable. In pair mode, two on-board chargers share a one 63 A/400VAC inlet. The operation via an AC charging wallbox is possible in accordance with EN 61851-1:2011. As an option the on-board charger can also be connected in parallel up to 8 units and thus scaled to higher charging power.

The REFUdrive on-board charger is equipped with the interfaces Modbus and Ethernet. Thus it is flexibly controllable and configurable. The charger can be controlled remotely via the diagnosis software.


  • Non-road mobile machinery (NRMM)
  • Construction equipment
  • Commercial vehicles
  • Public transportation
  • Municipal vehicles


Your advantages in brief

  • Compact
  • Highly efficient thanks to SiC semiconductors
  • Compatible with various battery types, AC wallboxes and DC charging stations
  • Up to 850 VDC charging voltage
  • 3-phase and single phase inlet
  • Liquid cooling
  • Wide temperature range from -30°C to +60°C

Most important data at a glance

  OBC 22K-450 OBC 22K-800 OBC 22K-850
AC voltage range 3-phase 360 - 480 V 360 - 480 V 360 - 480 V
Max. AC phase current 32 A 32 A 32 A
DC voltage range 200 ­­­­– 450 V 420 ­­­­– 800 V 550 ­­­­– 850 V
Max. DC charging current 70 A 40 A 32 A
Max. DC charging power 22 kW 22 kW kW

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