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Please refer to the VPAP III Series Battery Power Guide for the recommended
battery type and capacity, or contact ResMed's Technical Services division for
your specific application.
ResMed DC-24/30 Converter
ResMed supplies the DC-24/30 Converter (product code: 22015) which is
compatible with the DC input of the VPAP III ST-A. This is an accessory that may
be purchased separately through your ResMed distributor.
The DC-24/30 Converter can be connected to a 12V or 24V battery, or a cigarette
lighter socket (in a vehicle). When using a DC power supply, the power is turned
on and off via the switch on the converter, and not the power switch at the back
of the VPAP III ST-A. No power will be supplied to the HumidAire 2i integrated
humidifier when connected to a VPAP III ST-A using a converter.
Please refer to the DC-24/30 Converter instructions for further details.
Inverter or UPS
The power specifications for an inverter or a UPS are listed in the following table.
The case temperature should be less than 50°C at an ambient temperature of
35°C. (For VPAP III ST-A temperature specifications, see “System
Specifications” on page 37.)
Configuration
Continuous Output
Power Rating
Peak Output
Power Rating
VPAP III ST-A (without HumidAire 2i
humidifier)
60W
225W
VPAP III ST-A with HumidAire 2i
humidifier
Note: Use only a pure sine wave
inverter when a HumidAire 2i is
attached.
150W
300W (110V inverter)
600W (240V inverter)
