Tuck's Performance

SR4 Rooftop Air Conditioner – 12V/24V for Small Trucks

Name: SR4 Rooftop Air Conditioner – 12V/24V for Small Trucks
Brand: Tuck's Performance
Price: 1,599.00 AUD
Availability: InStock

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SR4 Rooftop Electric Air Conditioner (12V / 24V)

The SR4 is our most popular compact rooftop electric air conditioner for smaller cabins and tighter spaces. It’s a great fit for small trucks, camper vans, caravans, boats, and all sorts of machinery like loaders, excavators and dozers.

It’s a cooling-only rooftop system using modern variable-speed inverter compressor technology instead of old fixed-speed rotary compressors.

Because the compressor can change speed to suit the load, it uses far less power, runs much quieter, and is far easier on batteries than older designs. In normal operation these units are extremely quiet — in many setups you barely hear them running once the cabin has cooled down.

Why SR4?

Available in 12V or 24V
Compact, low-profile rooftop design
Variable-speed inverter compressor
Single 300mm high-output fan (quiet and efficient)
Can be used while parked or while driving (many rooftop units are park-only)

Compressor & Operating System

The SR4 uses the latest variable-speed inverter compressor technology. This is not the old-style rotary compressor that runs at 6000 RPM all day and flattens batteries in an hour or two.

Instead, the compressor speed changes automatically depending on how much cooling is needed. When the cabin is hot, it runs faster. As the temperature comes down, it slows itself down and power consumption drops with it.

Typical operating speeds:

Low: approx. 1500 RPM (holding temperature / low load)
Medium: approx. 3000 RPM (normal cooling)
High: approx. 4500 RPM (fast pull-down on hot starts)

This is modern A/C technology and it’s the reason these units can run for long periods without destroying battery systems.

Specifications (12V vs 24V)

Item	12V	24V
Cooling Capacity	7500–9000 BTU	9000–10500 BTU
Current Draw	16–75A	8–35A
Rated Power	500–800W	200–800W
Noise Level	50–62 dB
Air Flow	240–450 m³/h
Refrigerant	R134a (supplied un-gassed / not prefilled)
Fan	300mm × 1 (single fan)
Outdoor Unit Size	980 × 730 × 170 mm
Interior Fascia Size	850 × 600 mm
Total Weight	Approx. 36 kg

Materials & Build

Condenser: Aluminium
Evaporator: Copper (better heat transfer and durability)
Stainless steel fasteners and fittings where it matters
Built for harsh Aussie conditions (heat, dust and vibration)

Battery Protection

Soft-start system (no big current spike on startup)
Low-voltage cut-off to help prevent flattening your battery
Built-in fault / error code diagnostics

Wiring & Installation

Fully pre-wired system
Supplied with approx. 5 to 5.5 metre power harness / umbilical
Only 3 wires to connect
Mounts from inside the cab (easy one-person install in most applications)

⚠️Important: The unit is supplied un-gassed. Refrigerant R134a must be added during installation by a licensed automotive A/C technician (legal requirement).