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    400 Watt DC to AC Power Inverter

    400 Watt DC to AC Power Inverter

    Manufactured by Aims Corporation.

    Product Features

    400 Watt DC to AC Power Inverter by Aims Corporation, model number PWRINV 400W features a soft start function, overload protection, high grade thermal protection, and a low battery shutdown. With a modified Sinewave output form, output capacity is 400 watts with a surge power up to 1200 watts. At set of battery clamps cables are included as well as a cigarette lighter cable. The unit has two AC power outlets and an on/off switch.

    This inverter has an internal fan that runs continuously to maintain the internal temperature of the inverter. The fan is not designed to turn on and off dependent on the temperature of the inverter.

    Return On Warranty Issues Only


    Product Specifications

    This product carries a one year warranty from the date of purchase.

    • Model PWRINV400W
    • DC Input Voltage 12V (10-15V)
    • Output Wave Form Modified Sinewave
    • Output Power 400W
    • Surge Power Capacity 1200W
    • Efficiency Over 90%
    • No Load Current <0.75A
    • Battery Low Alarm DC 10.5 +- 0.5V
    • Battery Low Shutdown DC 10 +- 0.5V
    • Alarm and Thermal 55 +- 5 degrees C
    • Shutdown (automatic Recovery)
    • External DC Input Fuse Must be fitter, Use 40A
    • Power Switch DC Input ON/OFF Control
    • Dimensions (LxWxH) 7.25 in x 5 in x 2.5 in
    • Net Weight 0.7Kg always offers these services:

    • 8 am to 10 pm CST Toll Free Phone and Email Support
    • 24 hour access to our Support Forum
    • Learning Center for information on sleep apnea and cpap equipment
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    • Warranty Services for all items purchased through
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    Important Tips

    Battery Draw When Using an Inverter: The use of any inverter will reduce the battery life up to 50% because the inverter, itself, uses battery power.

    Inverter Fan: The fan on this inverter is designed to always run. It does NOT cut on and off based on the internal temperature of the inverter.

    Size Note: The manufacturer has made this item available in two sizes. The current size available is 7.25 in x 5 in x 2.5 in.

    Warranty: This product carries a one year warranty from the date of purchase.

    CPAP Video & FAQ

    Frequently Asked Questions (FAQs)

    What type of power does my CPAP need?
    Most CPAP and BiLevel machines today are designed to operate on both AC and DC battery currents. 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?
    First you need to determine if your machine is configured to operate on DC power and has a DC power outlet. If your machine does have a DC power outlet and you want to run your marine battery, then you will need the correct DC cable for your machine and an adapter cable that fits over the cigarette lighter plug and ends in alligator clips. sells complete battery kits with everything you need for your machine including the right cables for your machine and the battery. You can find the right battery kit for your machine here.

    If your machine does not have a DC power outlet, then you will also need an inverter to be able to run your machine on battery power.

    If you have questions about the specific power needs of your machine, review the "Power" tab on your 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 a deep-cycle marine battery. A CPAP set at 10cm will usually run for about three nights before having to recharge a deep cycle marine battery. A car battery will usually run a machine for 8 hours and still start the car.

    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 right 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.
    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 for 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