"RST Engineering" wrote

But then you multiplied that times two for "starting" wattage for a couple
of seconds to give 1725 watts under start and then times three for
starting under some volume of air left in the compressor reservoir or
about 2600 watts.

Most air compressors have a valve that lets off the air pressure in the line
between the pump and the tank, when they shut off.

You can tell if it has this feature, by seeing a little air line going to
the pressure on/off switch.

You may not need to multiply so big for starting with air in the tank.
--
Jim in NC