Top Review

    "Worked excellent on a five day camping trip in a pop up camper using a 12 volt deep cycle battery. Did not use the humidifier this time. "

    July 20, 2011

    Product Overview

    This is a pure sine wave DC to AC power inverter. Use this device to provide clean AC power to any CPAP.

    Manufactured by Aims Corporation.

    Product Features

    ResMed S8 machines with a Humidaire heated humidifier are required to use a pure DC-to-AC power source. The Humidiare humidifier is disabled when using the DC-12 Converter For S8 Machines.

    An inverter converts DC battery power to AC wall power. ResMed humidifiers can become damaged if the battery power is not inverted into a clean AC power source. Most inverters do not generate a pure signal from a DC battery and the Humidaire heated humidifiers are susceptible to power spikes. The 'Pure Sine' refers to a signal wave with controlled peaks and dips. Power signals that rise or fall erratically are dangerous to electronics.


    Product Specifications

    • DC Input Voltage 12V (10-16.2V)
    • Output Power 300W
    • AC Output Voltage 120VAC
    • Output Frequency 60 Hz +/- 0.5 Hz
    • Output Wave Form PURE SINE WAVE

    • Efficiency (Full load) 90%

    • Maximum Efficiency (1/3 load) 95%

    • Regulation +/- 6%

    • THD (max) 4%

    • No load current <0.7A

    • Battery low alarm 10~10.4VDC
    • Battery low shutdown DC 9.7~10VDC
    • Operation environment temperature 32F - 104F
    • High battery shutdown range 17V DC
    • Heat dissipationTHERMAL FAN

    • Dimensions (LxWxH) 205x242x80 mm

    • Net weight 2.02 Kg always offers these services:

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    Important Tips

    The use of any inverter will reduce the battery life up to 50% because the inverter, itself, uses battery power.

    You will not need this equipment if you are just powering the ResMed S8 machine. Use the 400 Watt DC to AC Power Inverter or similarly basic inverter with a minimum of 150 Watts continuous when not connecting the Humidiaire heated humidifier.

    The Pure Sine Wave Inverter will not work with the Battery Pack. Please visit our Power and Batteries section to select an alternative DC battery source. If you want to use a battery and need a means of charging the battery while camping outdoors, use the 400 Watt DC to AC Power Inverter.

    The Pure Sine Wave Inverter is not recommended for most machines. Equipment like the Respironics M series and ZZz-PAP machines will use the simpler 400 Watt DC to AC Power Inverter .

    CPAP Video & FAQ

    Frequently Asked Questions (FAQs)

    What type of power does my CPAP need?
    Most CPAP, APAP and BiLevel machines today are designed to operate on both AC and DC voltage. In the United States, the AC current from a wall outlet is 110 volts. Overseas, the AC current is usually 220 or 240 volt. Most batteries produce 12 volt DC current.

    We include information about the power needs and capacities on the pages our products. Please see the "POWER" tab on any machine product page for this information. You can also see a summary of the voltage range and whether it is DC capable on our Compare Charts.

    Here is a video explaining differences in power cords and power supplies of various CPAP machines:

    Will my CPAP operate on DC / battery power?
    All CPAPs will operate on DC power with the use of an Inverter to change the current from DC to AC before it reaches the machine. However, many will operate on DC power without the need for an inverter, just a power cord that plugs into the CPAP and ends in a cigarette lighter plug.

    Inverters do require a lot of power. If you need to use an inverter to run your machine on battery power, the inverter will probably take about half the life off the battery.

    To determine if your CPAP will operate without an inverter, look for a DC outlet on the machine, either at the back or on the side, with a single opening directly in the center. It should be labeled "DC POWER" or similar term. You can also review our Compare Charts to see if your machine has a optional DC cable option.

    Here is a video describing different DC cable and battery options for various machines:

    Will my CPAP operate overseas?
    An adapter may be required to plug a US power cord into a wall outlet in a foreign country. sells an assortment pack of World Traveler Power Adapter Plugs, which allow CPAP machines to plug into different types of wall sockets found in different countries.
    All the models sell contain power converters that enable the machine to operate on any AC current from 100 to 240 volts without any adjustment.
    How do I use a battery to operate my CPAP?

    All machines can connect to DC power. Some machines are configured to operate on DC Power and have a DC power outlet. Other machines require AC power and will need an Inverter that turns DC power to AC power.

    Having the proper equipment is the biggest key to successfully operating the machine from a battery. For example, if your machine does have a DC outlet and you want to run your machine from a marine battery, be sure to get the correct DC cable for the machine, as well as an adapter cable with alligator clips that fits over the cigarette lighter plug. sells complete battery kits with everything you need for many machines including the correct cables for those machines and batteries. If you have questions about the specific power needs of your machine, review the 'Power' tab found on the machine's product page, or give us a call at 1-800-356-5221.

    What type of battery should I use?
    For longer battery use, we suggest using a deep-cycle marine battery to power the machine. A deep-cycle marine battery is heavier than the ordinary battery, but it has many advantages. The battery is easily found at auto shops and it provides power to the machine for an extended period of time. For example, a CPAP machine set at 10 cm H20 and charged on a deep-cycle marine battery will usually last three nights before it needs to be recharged.

    There are small, portable battery packs that will operate a CPAP set at 10cm for at least one night, or about eight hours. sells full Battery Kits that come with everything needed to run your machine off battery power including the correct cables needed for your machine and a battery. You can find the battery kit for your machine Here. On each battery kit page, you can input your machine and pressure setting to see an estimate battery life for your machine.

    Some machines have batteries created to be used specifically with them only. Here are some of the machines we carry with integrated or specialized battery options:

    Transcend EZEX miniCPAP™ Machine
    Z1 Travel CPAP Machine
    Transcend Auto miniCPAP™ Machine with EZEX
    Z1 Auto Travel CPAP Machine
    How do I prepare for power outages with CPAP?
    There are a lot of back up battery choices out there that can give you peace of mind in case of a power outage. The Transcend Travel CPAP Machine has Battery Options available that can set up as a fail-over, back up battery. Review the 'POWER' Tab on the machine page. sells Battery Packs to accompany your machine if an integrated battery is not available. Visit CPAPtalk for more advice specific to your needs, or view this past thread on the topic here.
    Visit the Learning Center

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