US 12,489,390 B1
The Patented Solar APU System
A system-level architecture integrating solar generation, storage, HVAC control, and intelligent power management for engine-off operation.
The patented system describes an integrated auxiliary power unit (APU) that combines:
- Roof-mounted solar panels
- A regulated solar controller
- A battery bank sized to support HVAC loads
- An inverter supplying electrical power
- An HVAC controller capable of engine-off operation
- Automatic coordination with the vehicle alternator or generator
Distinct elements
- Intelligent power source selection
- HVAC operation independent of engine runtime
- Coordinated charging from solar and engine-driven sources
- Cab-mounted and trailer-mounted configurations