Nomadic Cooling S1 Helix Split System Air Conditioner

Quiet no-idle cooling for sleeper cabs, vans, and off-grid builds

Stay cool overnight without idling your engine thanks to a split-system air conditioner built for quieter rest and better battery-powered comfort. The Nomadic Cooling S1 Helix is available in 12V or 48V, delivers up to 9,600 BTU (2.8 kW) cooling in the 12V version, and pairs with Helix controls for app-based scheduling, monitoring, and pre-cooling.

Benefits & Use Cases

The S1 Helix is designed for drivers and builders who want engine-off cooling without giving up roof space or interior comfort. By moving the condenser outside and keeping the evaporator inside, this split layout reduces interior noise while keeping the roof clear for solar panels, roof racks, or clearance-sensitive installs.

It is a strong fit for sleeper cabs, off-grid vans, expedition vehicles, and other mobile setups where battery efficiency, quiet operation, and a lower exterior profile matter. Helix integration also adds remote access from your phone, tablet, or watch for easier day-to-day climate control.

• No-idle operation helps reduce fuel use and engine wear during overnight stops
• Split layout keeps noisy components outside for a quieter sleeping space
• Roof stays free for solar panels, storage, or height-sensitive vehicle builds
• Helix app compatibility supports remote monitoring, scheduling, and pre-cooling
• Eco mode helps balance comfort with battery longevity
• Powder-coated components and stainless steel hardware are built for road use and weather exposure

Technical

• System Type: Split-system DC air conditioner
• Voltage Options: 12V or 48V
• Cooling Output: 9,600 BTU (2.8 kW) for 12V version
• Helix Max Cooling Output: 10,936 BTU (3.2 kW)
• Current Draw on 12V: Approx. 30–38A in ECO mode; approx. 47–68A in MAX mode
• Noise Level: Up to 60 dBa
• Refrigerant: R134a
• Temperature Setting Range: 41°F to 86°F (5°C to 30°C)
• Total Weight: Approx. 75 lb (34.0 kg)
• Exterior Unit Dimensions: 25 x 17.6 x 6.6 in (635 x 447 x 167.6 mm)
• Interior Unit Dimensions: 20.7 x 10.2 x 6.7 in (525.8 x 259.1 x 170.2 mm)
• Recommended Battery Bank: 400Ah to 600Ah lithium (LiFePO4) for longer overnight runtime
• Suggested Solar Support: 300W to 600W rooftop solar where applicable
• Installation Note: Professional installation is recommended for refrigerant line connection, evacuation, and charging

Vehicle Compatibility

• Truck sleeper cabs needing engine-off overnight cooling
• Off-grid camper vans with battery banks and roof-mounted solar plans
• Expedition trucks and overland vehicles where roof clearance matters
• Custom mobile builds that prefer an exterior condenser and quiet interior evaporator layout

FAQs

Can the S1 Helix run without idling the engine?
Yes. It is designed as a no-idle electric APU alternative, so it can cool the cabin from your battery bank instead of relying on overnight engine idle.

Is this better than a rooftop air conditioner for some builds?
For many trucks and vans, yes. The split layout keeps the roof clear for solar panels and helps maintain a lower overall vehicle profile. 

What battery bank should I pair with it?
For meaningful overnight runtime, a 400Ah to 600Ah LiFePO4 battery bank is a practical target, especially in warmer climates. 

Can I add solar with this setup?
Yes. Because the roof is not occupied by a bulky rooftop AC, many builders use that extra space for solar to help offset daytime cooling demand. 

Is this a DIY-friendly installation?
It is more involved than a self-contained rooftop unit because the refrigerant lines must be connected and properly serviced. Professional HVAC-style installation is strongly recommended.