Inverters will generally need to be rated for 3000+ continuous watts to start the compressor. Explanation:
The Mantus Scuba Compressor uses a 1.5 kW electric motor, but the peak current on start of the machine can be up to 5 times higher at 7200 watts for a few milliseconds (read on high torque motor’s LRA versus RLA). Inverters list their surge capacities in several different ways, but generally they will list a 5 second surge capacity. A 5 second surge capacity of 4500 watts has been shown to be sufficient as inverters have higher surge capacity the shorter the surge is. Looking at the most common inverters on the market, an inverter rated for 3000 continuous watts would be the minimum we would recommend to match 4500+ surge watts.

Gas generators will sometimes have even more surge capacity for startup. For example the Honda 2000 watt 30 amp model can start our compressor.

If you are using an inverter or generator that barely meets these requirements, you may need to start the compressor at 0 PSI. Connect your scuba tank but leave its valve closed so it is sealed from the compressor. Drain remaining air in the compressor. Now when you start your compressor, it will draw much less surge amps to get the motor spinning. Then you can slowly open your scuba tank and fill as normal.

On shore power a standard 15 amp breaker with little competing load should be sufficient to run the compressor.

110V vs 220V: Which to Buy? The 110V version comes with a standard North American grounded plug (NEMA 5-15). The 220V version comes with a standard European grounded plug (Schuko Type F).
There are no mechanical or efficiency advantages to the 220V over the 110V, so we recommend getting the voltage option matching your inverter.
For shore power, match the standard voltage in your area.
For our North American customers, we strongly recommend the 110V version to avoid being limited to 220V utility outlets that require uncommon adapters.