Developed to deliver maximum thermal output and dependable performance in the harshest conditions, the EW4-800V DC provides 10kW of variable auxiliary heating for high-voltage battery-electric and hydrogen fuel cell applications.

Ideal for batteries, cabin HVAC, large coolant loops, and powertrain thermal management circuits, the EW4 offers plug-and-play integration with a compact footprint and smart communication via CAN 2.0 (SAE J1939) or LIN.

Its self-regulating PTC heating core ensures rapid heat-up without compromising safety or efficiency, while integrated fault detection monitors voltage, current, and system health in real time.

With a wide coolant temperature range (-40°C to +90°C) and IP67/IP6K9K sealing, the EW4 is built for extreme temperature, vibration, and moisture-prone environments.

See the features that make our auxiliary heaters practical, efficient, and suitable for a wide range of vehicles.

• High capacity 10kW PTC heat output: High thermal output for large systems or extreme cold climates.
• Wide voltage compatibility (550–900V DC): Seamless integration into next-gen BEV and FCEV architectures.
• Self-regulating PTC technology: Delivers efficient heating with no risk of overheating.
• CAN or LIN control: Enables precise thermal regulation and real-time diagnostics.
• Compact form factor: Small footprint and lightweight for easy integration.
• Tested for vibration and temperature extremes: Ensures durability in demanding applications.
• Rugged construction: IP67/IP6K9K rated for protection in harsh operating environments.

Each technical component helps the heater achieve stable performance and consistent heat delivery.

• Dimensions: 229mm x 255mm x 110mm (L x W x H)
• Weight: < 5.0 kg
• Coolant temperature: -40°C* to +90°C
• Ambient Temperature: -40°C to +85°C
• Storage temperature: -40°C to +105°C
• Heating capacity: 10kW
• Voltage range: 550–900V DC
• Nominal current: 12.5A
• Control: CAN/LIN