Solution Category: Auxiliary Power

Auxiliary Power

Auxiliary Power (APU) is designed for when space constraints within the vehicle prohibits the use of an integrated solution, an auxiliary power can often provide a viable alternative, particularly when upgrading or enhancing an existing platform.

Solution Category: Auxiliary Power

Power Generation (APU3)

The Calatherm APU 3 is a diesel auxiliary power unit that not only provides DC power but also dedicated vehicle air conditioning (A/C), making it ideal for ICE vehicles that need an independent source of auxiliary cooling. Powered by a compact diesel engine driving twin scroll compressors and supporting dual air handling units, it maintains operating conditions across a wide range of ambient temperatures. Built into a heavy-duty, low-maintenance modular chassis, the APU 3 is designed for continuous operation in extreme climates.

Solution Category: Auxiliary Power

Hydrostatic Alternator

Calatherm’s Hydrostatic Alternator provides dependable onboard electrical power generation and battery charging by converting mechanical engine power into electrical power through a hydrostatic VDP. Hydraulic energy is then used to drive a brushless 300 AMP DC alternator. Integrated battery management features active charge monitoring and temperature compensation to optimise charging performance and extend battery life. Advanced diagnostics and data logging support maintenance and fault identification, while protective limp-mode operation enables continued power generation at reduced output under specified fault conditions. Designed to operate across a wide range of engine speeds, the system delivers a robust and efficient solution for railway onboard electrical power generation.

Product Advantages

Customised Solutions

Bespoke systems designed, built and supplied to suit customer specific requirements, from standalone APUs to fully integrated power and thermal solutions.

Modular System Design

Configurable architecture supports straightforward installation, servicing and long-term maintenance.

Proven Component Architecture

Built using established and where possible Commercially Off The Shelf (COTS) components, from trusted suppliers, maximising reliability across demanding vehicle platforms.

Get in touch

Have any questions about our products, services, or how we can support your thermal management needs? Get in touch with our team today, and we'll be happy to assist you.