Good question! Living in the desert southwest, IMHO 100% duty cycle is mandatory when its sunny and 112 degrees outside.Is the 100% duty cycle worth the extra dough over the 400p?
Is the fitting at the rightside of the manifold a pressure switch?Single ARB compressor mounted inside the cargo bay, directly over the jack compartment. Completely adequate for boosting 265-75R16 KO2s from 18 PSI back to 45 PSI in a reasonable period of time. Inside mounting protects the system from dust, moisture, and the compressor runs MUCH cooler than one in the engine bay that's already heat-soaked to over 120F.
Since I had already run aircraft-quality wire back to the cargo bay for the compressor, I included a power-distribution panel with circuit-breaker protected outlets for the fridge and an aux 12VDC outlet. A master 50A marine circuit breaker in the engine bay protects the wiring, which runs inside the LH frame rail.
Yes, that's an adjustable aircraft pressure switch, set at 60 PSI. I normally just watch the gauge on the manifold and shut the compressor off when tire pressure reaches the desired value, but the automatic 60 PSI shutoff keeps pressure within the safe range for E-load range tires if I should get distracted.Is the fitting at the rightside of the manifold a pressure switch?