Aux Heat EW3-800V DC – 7KW PTC Electric Water Heater

Home - Products - Aux Heat EW3-800V DC – 7KW PTC Electric Water Heater

Aux Heat EW3-800V DC – 7KW PTC Electric Water Heater

Reliable, high voltage heating easily integrated into your application’s thermal system.

Developed for next-generation electric, hydrogen fuel cell, and hybrid vehicles, the EW3-800V DC delivers 7kW of instant, self-regulating heat to batteries, cabins or coolant circuits – especially in low ambient conditions.

With a compact footprint, full CAN 2.0B control, and compatibility with 800V battery-electric architectures, the EW3-800 VDC is a plug-and-play solution for OEMs needing precise, auxiliary heating across heavy-duty and stationary power applications.

Key Benefits

Compact, High-Output Design

Delivers 7kW of reliable PTC heat in a small, easy-to-integrate footprint.

800V System Compatibility

Engineered for seamless use with high-voltage electric and fuel cell platforms.

Smart CAN Control

Supports full diagnostics, remote fault detection, and precise thermal regulation.

Cold-Climate Ready

Maintains performance in ambient conditions down to -40°C.

Overview

Features

Technical

Applications

Overview

Features

Technical

Applications

Recommended Products

Magnetic Drive Electric Water Pump

Our sealless design magnetic drive pump provides superior reliability, low maintenance and high flow vs pressure performance for hybrid, electric, hydrogen and internal combustion vehicles.

Resistive Electric Water Heater

The Grayson Resistive Electric Water Heater series delivers critical heat to full electric, hydrogen or hybrid vehicles’ driver/passenger cabins or batteries in even the coldest of conditions.

C100 Driver Cabin HVAC

Simple to install and with low life cycle costs, the C100 with reversible heat pump technology is the efficient and versatile HVAC solution for your application.

Contact us

Looking for more information about our thermal management products, aftermarket parts and servicing, or need technical support from one of our expert engineers? Complete the form below and we will respond as soon as possible.

Thermal management product enquiry

If you’re interested in Grayson’s thermal management solutions for your application, please fill out the form below, and one of our team members will get in touch with you soon.

Technical support enquiry

Do you have a technical support query? Fill out the form and one of our thermal experts will respond to you soon.

Aftermarket parts and servicing enquiry

If you are interested in Grayson’s heating and cooling spare parts or fleet maintenance and servicing, complete the form below and a member of our Aftermarket team will be in touch.

Our solutions in action

Discover how we partner with our clients to create heating and cooling solutions that deliver in the real world.

Our highly experienced design team are experts in crafting solutions to the most challenging of specifications.

Every system is a complex mix of components that are engineered to work in harmony with each other; that’s exactly what we do, leaving you with one less problem to solve.

Learn more about us

Products

We work with you to provide thermal management solutions that meet your needs, no matter what the application. Discover our product ranges today.

Downloads

Looking for more information? From product brochures to detailed technical specifications, all our literature is easily and freely accessible at our Downloads Centre.

Sectors

From innovative electric-powered and hydrogen-powered buses to retrofit solutions for off-highway applications, we have the experience and expertise to meet the needs of your application.