Webasto has launched three new electric High Voltage Heaters (HVH) with 10 to 12 kilowatts of heating power for electric cars, trucks, buses, construction machinery, and special vehicles. According to the manufacturer, the “HVH 100 Compact”, “HVH 100 Compact+” and “HVH 120” heaters are no larger than a DIN A4 sheet of paper and convert direct electric current into heat with practically no losses (more than 95 per cent).


The thin heating layer of the High Voltage Heaters is firmly bonded onto the heat exchanger having a large contact area. As a result, the three new HVHs heat up extremely fast and are highly efficient. The service life of the High Voltage Heaters is between 15,000 and 25,000 heating hours.

Webasto’s new high voltage heaters (HVH)

The heaters support low voltages of 12 or 24 volts (V) and heat in the high-voltage range from 250 to 880 V. Despite their compact size, the power packs deliver 10 and 12 kilowatts (kW) of heating power and are therefore particularly efficient. If the heat requirement for passenger or cargo compartments is greater, several HVH can be combined.

All three heaters are controlled via LIN bus (Local Interconnect Network). The HVH 100 Compact+ and the HVH 120 also utilise the faster CAN protocol (Controller Area Network), which is commonly used in commercial vehicles.

On the safety side, the three HVH are certified for various applications in accordance with CE, ECE-R10 and ECE-R122. They have active discharge support, for example to discharge the high-voltage circuit to a safe voltage range of below 60 V in milliseconds before working on the device. The high-voltage heaters are protected against cyber attacks and certified in accordance with ISO 21434.

“The focus during development was on making the three new High Voltage Heaters more compact, lighter and more sustainable, while at the same time covering the widest possible range of applications. Thanks to the various connection and control options, the HVH can be flexibly integrated into vehicles and machines,” said Webasto Chief Technology Officer Marcel Bartling.


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