800-volt heating solutions from Eberspaecher
With two new solutions for 800-volt electrical systems, Eberspaecher is expanding its portfolio to include coolant and air heaters
We report on how two new solutions for 800-volt electrical systems from Eberspaecher contribute to mitigating the environmental impact of battery-powered electric applications.
Eberspaecher for 800 Volt: PTC Technology
We’re talking about a coolant heater with thick film technology and an air heater with PTC technology. The core component is a thick film element (TFE), which is applied to a metal plate via a screen-printing process. This design provides high heat output in minimal installation space. The component conditions the vehicle battery and achieves up to 12 kW of output at 800-volt – a key contribution to extending battery life and reducing charging times.
A further advantage is the flexibility of the voltage: Although many BEV platforms rely on an 800-volt architecture, they must also be compatible with the 400-volt charging infrastructure. The coolant heater has been designed specifically for this scenario, delivering sufficient output even at 400-volt. The safety concept is based on multiple sensors and an independently operating second shutdown path, ensuring maximum operational safety. This reliably monitors and controls thermal processes. Production is scheduled to begin in 2027.
Air heater
The air heater, which is installed directly in the air-conditioning system, supplements the portfolio. The multi-zone function enables the driver to control the temperature separately in up to four zones in the interior. For example, the driver can set different temperatures for the driver and front passenger sides. PTC technology is used for the air heaters, which are located close to the passenger and partly within the firewall.
With a power range of 3-8 kW, the heater has been designed to accommodate both 400- and 800-volt architectures. Eberspaecher avoids using adhesives in the setup of heating elements wherever possible, thereby minimizing the risk of unwanted emissions in the passenger compartment. The product will be available in Asia, Europe, and North America starting in 2028.
