THE SYSTEM

One system. Cooling, heat, and power — without the main engine.

The Electric APU replaces overnight main-engine idling with a self-contained, battery-powered climate and power system built for the sleeper cab.

APU Monster next-generation electric APU system on a Class 8 truck
01
Cooling

15,000 BTU Electric Compressor

02
Battery

Lithium Battery Bank & BMS

03
DC-to-DC Charger

Intelligent Charging While Driving

04
Diesel Heater

4kW Cabin Comfort Heater

05
Inverter

12V to 110V Pure Sine Wave Power

WHILE DRIVING vs. WHILE PARKED

The system works in two modes.

While driving

  • Alternator charges the lithium bank via DC-to-DC charger
  • Main engine provides all cabin comfort as usual
  • APU stays idle, battery tops up

While parked

  • Main engine off
  • APU compressor runs on stored battery power
  • Inverter powers cabin devices
  • Diesel heater available for cold weather
CONFIGURATION OPTIONS

Two battery configurations. One reliable base unit.

560Ah
10–12 hrs runtime
920Ah
16–20 hrs runtime
+
Optional diesel heater & inverter

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