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Cooler PE3

The PE3 line delivers maximum cooling capacity with three-fan air-to-liquid coolers for power electronics, traction motors, and inverters.

Configurable with integrated header tanks and Grayson’s CAN-enabled controllers, the PE3 provides robust, proven passive cooling for heavy-duty vehicles and stationary power systems. With over 100,000 coolers produced, it is trusted for reliable, high-capacity cooling across the most demanding applications.

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Overview

The PE3 line delivers high-capacity cooling with three-fan air-to-liquid coolers built for heavy-duty platforms. In a closed-loop system, coolant flows through inverters, motors, or electronics before releasing heat through a large tube-and-fin radiator with three integrated fans.

OEMs can specify integrated header tanks or Grayson’s Intelligent Thermal Controller with CAN-based smart fan control. Designed and manufactured in-house, the PE3 ensures durable, efficient performance.

A stainless-steel version is available as standard for harsh or corrosive environments, enhancing durability and corrosion resistance.

Available in proven off-the-shelf models or customised to OEM requirements, each PE3 solution is validated through detailed modelling to ensure reliable thermal performance.

Features

Our cooler designs focus on efficient thermal performance, durability in operation, and straightforward integration within vehicle systems.

  • Air-to-liquid cooling: Keeps coolant temperatures stable under the heaviest loads.
  • Three-fan configuration: Delivers higher capacity cooling for medium-to-large heat loads.
  • Stainless steel variant: Enhanced corrosion resistance and durability in harsh environments.
  • Optional header tanks: Simplifies packaging and coolant system integration.
  • Smart CAN-enabled control: Provides efficient, reliable fan speed regulation.
  • Durable tube-and-fin design: Proven passive cooling for global applications.
  • Proven in service: Trusted by OEMs across demanding markets.
Technical

Each technical component contributes to reliable heat management, ensuring stable operation across varying duty cycles.

  • Fan configuration: 3-fan
  • Voltage options: 24V DC
  • Options: Integrated header tank, CAN-enabled V3 controller
  • Design: Tube-and-fin air-to-liquid cooler
  • Applications: Power electronics, traction motors, inverters, stationary power
Model Variations

The cooler range includes several configurations to meet different vehicle types, thermal loads, and installation requirements.

  • CP-4771-300 – 3-fan system with V3 controller 
  • CP-6736-000 – 3-fan system with integrated header tank, rooftop         
  • 1A-10041-0A01 – 3-fan system, stainless steel
Fan Configuration

2-Fan Design

Higher cooling capacity for medium-to-large systems.
Control Options

V3 Controller with CAN

Wide HV compatibility for integration across multiple BEV and FCEV platforms.
Air-to-Liquid Cooling

Tube-and-fin design

Transfers heat from coolant loop to airflow for reliable passive cooling.
Material Options

Stainless Steel Variant

Provides enhanced corrosion resistance for harsh environments.
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Compatible Applications

Product Benefits​

Discover why on-highway and off-highway OEMs choose Grayson PE3 line of coolers to protect their application’s critical components’ temperatures.

Higher Cooling Capacity

Three fans provide high cooling capacity for heavy electrified applications.

Heavy-Duty Ready

Engineered for demanding industrial and vehicle environments.

Corrosion-Resistant Option

Stainless steel option improves durability in harsh or corrosive conditions.

Flexible Options

Supplied as a ready-to-install cooling solution.

Contact Us

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Discover More About Grayson

For over four decades, Grayson Thermal Systems has been a leader in delivering reliable heating and cooling technologies to vehicle markets worldwide. Our solutions combine innovation with proven expertise to keep systems efficient and dependable.