The EW3 is a compact, high-output 7kW PTC electric water heater, engineered for next-generation 800V BEV and FCEV platforms.
With smart CAN control, robust IP-rated protection, and rapid heat delivery, it’s ideal for battery, cabin, and coolant system heating in heavy-duty and stationary power applications, even in extreme cold.
Designed for OEMs building high-voltage electric, fuel cell, and hybrid systems, the EW3-800V DC delivers 7kW of self-regulating PTC heating in a compact, rugged package.
Compatible with 700–900V DC systems, it provides rapid, efficient heating for cabin HVAC, battery thermal management, or auxiliary coolant loops in demanding applications.
Its CAN 2.0B interface supports smart control, monitoring, and real-time diagnostics, while built-in over-temperature and over-voltage protection safeguard operation.
Fully sealed to IP67/IP6K9K, the EW3 withstands harsh operating environments and ambient temperatures from -40°C to +105°C. This plug-and-play solution integrates easily into high-voltage architectures, offering long-term reliability and stable performance in both high and low ambient conditions.
Discover the key features that ensure our auxiliary heaters deliver effective performance and easy integration across vehicle platforms.
Each technical component supports the heater in achieving reliable heat output and dependable operation in service.
Discover why Grayson’s EW3 is the PTC heater of choice for heavy vehicles and industrial machinery OEMs across the globe.
Fits tight spaces without compromising performance.
Up to 900V DC – ready for the next generation of electrified applications.
CAN control for precision heating and diagnostics.
Maintains performance in the coldest and hottest of conditions.
