Medium Duty Onboard Air System 150 PSI Compressor Kit - Onboard Power

Our review of this medium duty onboard air system finds it best suited to drivers who need a compact, vehicle-ready source of high-pressure air for horns and auxiliary pneumatic tasks. The kit's biggest draw is the included 2.5 gallon tank combined with a 150 PSI-rated compressor that installs with a simple two-wire hookup, making it practical for SUVs, trucks, RVs and boats that need an on-board air supply without complex plumbing. It delivers usable pressure quickly and includes the fittings and wiring needed for straightforward mounting and operation.

Key Features

• 150 PSI max working pressure: Provides a high-pressure supply that suits most train and air horns and other pneumatic accessories requiring elevated pressure.
• 2.5 gallon tank with five ports: The tank has multiple 1/4 NPT ports and a drain cock for flexible routing and easy maintenance.
• Complete installation kit: Comes with pressure switch, relay, gauge wire with inline fuse, fittings and mounting hardware to reduce additional purchases.
• Compact dimensions: The tank measures about 20.25in by 6in by 8in, fitting in tight vehicle cavities and simplifying placement.
• 33% duty cycle at 100 PSI: The compressor is rated for intermittent medium-duty use and balances power with durability for non-continuous applications.

Who It's For

This kit is aimed at vehicle owners who want a self-contained 12 volt onboard air source specifically for high-pressure air horns or occasional pneumatic tools. It is a practical choice for installers who prefer a bundled solution that includes tank fittings, a remote mountable air filter, and the electrical components needed for a clean install.

Those who need heavy continuous duty inflation for commercial tire shops or constant air for air tools should look elsewhere; the compressor has a medium-duty duty cycle and a maximum amp draw of 25 amps which suits intermittent horn blasts and occasional use better than continuous industrial operation.

Pros & Cons

Pros

• Includes a ready-to-mount 2.5 gallon tank and comprehensive fitting kit for quick setup.
• 150 PSI maximum gives strong performance for most high-pressure horns and accessories.
• Simple two-wire installation with provided relay and inline fuse makes vehicle wiring straightforward.
• Compact tank size fits in many vehicle locations without major modification.

Cons

• Compressor quality has mixed feedback from some users, so long-term reliability may vary.
• The 33% duty cycle at 100 PSI limits continuous use scenarios compared with industrial compressors.

Specifications

Compressor Power	12 Volt
Max Working Pressure	150 PSI
Duty Cycle	33% @ 100 PSI
Max Amp Draw	25 Amps
Tank Capacity	2.5 gallon (9.5 L)
Tank Ports	5 x 1/4 NPT ports
Included Hoses/Wiring	22in braided hose, 6ft air line, 20ft gauge wire

Our Verdict

The kit is a sensible value for vehicle owners who need a compact, high-pressure onboard air source for horns and occasional pneumatic tasks. With a fully kitted tank, fittings and wiring included, it simplifies installation and delivers strong pressure up to 150 PSI, though those needing continuous industrial use should choose a heavier duty compressor.

Frequently Asked Questions

Can this kit run high-pressure air horns?
Yes, the compressor and 2.5 gallon tank are designed to supply high-pressure air horns and include quick connect fittings to hook up horn lines.

How hard is installation in a typical truck?
Installation is relatively straightforward: the kit includes a pressure switch, relay and 20ft gauge wire with inline fuse, and the compressor requires a two-wire power connection.

Is this suitable for continuous air tool use?
No, the compressor has a medium-duty 33% duty cycle at 100 PSI and a 25 amp draw, so it is best for intermittent use rather than continuous industrial operation.