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Cooler PE4

The PE4 is Grayson’s large-capacity, four-fan air-to-liquid cooler, engineered for heavy-duty vehicles and stationary power systems.

With a 100kW cooling capacity at 48°C ambient, the PE4 provides robust thermal protection for power electronics, traction motors, and inverters. Featuring integrated CAN-enabled control (V3 controller) and proven tube-and-fin design, it delivers reliable, plug-and-play performance in the most demanding environments.

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Overview

The PE4 is the high-capacity cooler in Grayson’s portfolio, delivering four-fan air-to-liquid cooling for applications with extreme thermal demands. In a closed-loop system, coolant is circulated through power electronics, traction motors, or inverters before rejecting heat via the PE4’s large surface-area tube-and-fin radiator and four integrated fans.

Equipped with Grayson’s Intelligent Thermal Controller and proprietary control logic software, the PE4 ensures precise fan speed regulation and efficient energy use. With a 100kW heat rejection capacity and 200 l/min flow handling, it is purpose-built for heavy-duty electrified platforms.

Alongside its off-the-shelf model, Grayson can also configure or build tailored PE4 systems, modelling real-world parameters to deliver optimised, validated cooling solutions.

Features

Our coolers are built with features that deliver efficient heat rejection, strong durability, and compatibility with a wide range of vehicle systems.

  • Air-to-liquid cooling: Maintains coolant temperatures to protect inverters, traction motors, and electronics from overheating.
  • Four-fan design: Maximum capacity for heavy-duty duty cycles and high heat rejection.
  • 100kW cooling performance: Provides reliable thermal control in extreme ambient temperatures up to 48°C.
  • Integrated V3 controller: Enables CAN-based control for efficient fan speed regulation.
  • Proven tube-and-fin design: Reliable passive cooling technology validated in global applications.
  • Configurable options: Grayson can adapt the system to meet OEM-specific duty requirement.
Technical

Each technical component helps achieve steady cooling performance, supporting consistent operation even in demanding environments.

  • Model: CP-4705-200
  • Fan configuration: 4-fan with integrated V3 controller
  • Cooling capacity: 100kW @ 48°C ambient
  • Coolant flow: 200 l/min
  • Coolant outlet temperature: 95°C
  • Voltage: 24V DC24V DC
  • Dimensions (mm): 827 × 1081.5 × 393
  • Weight: 110.24kg
  • Ambient capability: 48°C
Fan Configuration

4-fan system

Provides maximum heat rejection in the PE range.
Control Options

Integrated V3 Controller

Smart CAN-based fan control with proprietary thermal logic.
Flow Rate

200 l/min

Handles high-volume coolant circulation for demanding duty cycles.
Cooling Capacity

100kW @ 48°C ambient

Delivers robust cooling performance for heavy-duty electrified applications.
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Compatible Applications

Product Benefits​

Discover why on-highway and off-highway OEMs choose Grayson PE4 line of coolers to protect their application’s critical components’ temperatures.

Maximum cooling performance

100kW heat rejection ensures stable operation in extreme thermal environments.

Heavy-Duty Ready

 Four-fan configuration supports the largest vehicles and industrial systems.

Smart control integration

V3 controller enables CAN-based fan speed regulation.

Plug-and-play design

Supplied as a ready-to-install cooling solution.

Contact Us

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Our Capabilities

Get the Right Cooling Solution for Your System

Drawing on your specified ambient temperature limit, coolant flow rate (l/min), heat rejection (kW), and coolant temperature target, Grayson will define the most suitable system or engineer a tailored solution. Learn More

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Discover More About Grayson

For more than four decades, Grayson Thermal Systems has delivered advanced thermal management technologies to global vehicle markets. Our solutions are built for efficiency, reliability, and long-term use.