This Aims Corporation DC to AC Power Inverter Model 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. Return On Warranty Issues Only
This product carries a one year warranty from the date of purchase.
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
External DC Input Fuse Must be fitter, Use 40A
Power Switch DC Input ON/OFF Control
Dimensions (LxWxH) 183x102x46mm
Net Weight 0.7Kg
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The use of any inverter will reduce the battery life up to 50% because the inverter, itself, uses battery power.
This product carries a one year warranty from the date of purchase.
"I bought this unit with plans to take it on safari in March 2007. I'll be in tented camps with no conventional electricity but can use my CPAP with a battery that the safari company promises to recharge every day (btw both Thomson and Ker & Downey can make this promise.) My CPAP has an integral humidifier that I understand will pretty much drain the car battery every day.
I've done a test to make sure this unit works okay with my own car battery. I'll do a further 8 hour test later but, frankly, even if I'm only able to get 2-3 hours of good sleep using this unit before my CPAP drains the battery, I'll be happy. Something is better than nothing!"
Voted most helpful critical review
AC Power Invert Too Noisy
Erik D, MD – November 18, 2008
"I bought this AC power inverter so I could power the humidifier on my Respironics M-Class CPAP using a battery. The CPAP can run directly off of the DC battery, but the humidifier heater requires AC. I did not realize from the product description that it has one or more cooling fans and is too noisy for use while sleeping! Kind of defeats the purpose. I am looking for a better inverter - or at least a quieter one."
"Great. Just what I needed to recharge my cpap lithium ion battery."
Matthew L, PA – November 10, 2011
"Product feels high quality, power switch, and works well. It comes in a hard carrying case. I have read people complaining about fan noise, but the fan doesn't seem that loud to me. I also like that can use the CPAP battery to power other small devices in a power failure if needed and that this device allows you to charge your CPAP battery from the car."
Leo P, CA – June 18, 2011
"Just came back from a two-day car camping trip in Big Sur. I charged the battery back to full power after the 1st night while driving around Big Sur using the Power Inverter. No problems with either the inverter nor the battery pack."
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 wall outlets is 110 volt and most batteries produce 12 volt DC current. Overseas, the AC current is usually 220 or 240 volt.
We include information about the power needs and capacities in the description of 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.
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.
Will my CPAP operate overseas?
An adapter may be required to plug a US power cord into a wall outlet in a foreign country. CPAP.com 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 CPAP.com sell contain power converters that enable the machine to operate on any AC current from 100 to 240 volts without any adjustment. Check with your dealer or manufacturer to see if your machine needs an external converter that lowers the voltage from 240 to 120 VAC.
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.
CPAP.com 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. CPAP.com 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 II Travel CPAP Machine has Batterie Options available for that can set up as a fail-over, back up battery. Review the "Power" Tab on the machine page.
CPAP.com 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.