Camping with Resmed S8 . . .

What do I need to run it?

search.php

http://www.apneasupport.org/search.php

Do a search for camping and a search for battery on each site.

Here is a link to Rested Gals post about battery power. I'm sure you'll find what you need there.

viewtopic.php?t=9682

Brenda

The problem (and I share it with you, I have a Vantage and Humid Aire 3) is that the ResMed Vantage/HumidAire 3 ABSOLUTELY, POSITIVELY REQUIRE a pure sine wave power source. Modified sine wave (and nearly all the common power converters/inverters put out a modified sine wave) will not work and will damage the machine. The humidifier won't work on DC at all. You CAN use the Vantage ALONE with a 12 V deep cycle battery, as long as you use their DC power converter/cable (the polarity on the ResMed's DC socket is reversed). The ResMed DC cable takes care of that, and holds the voltage to a tightly controlled range. It plugs into the DC socket on the Vantage and connects to the posts on the 12V battery.

So, you can use the deep cycle battery and the Resmed converter/cable plugged in to the Vantage's DC socket, but NOT with the humidifier connected;

or

you can use the deep cycle battery, a PURE SINE WAVE power inverter -- DC to AC -- with the Vantage's AC cord plugged into the inverter and the humidifier connected as usual.

Don't forget a battery charger for the battery. The battery should be either a deep cycle gelled battery or a deep cycle Absorbed Glass Mat (AGM) battery... both types are sealed, don't spill even if tipped over or cracked and do not emit hydrogen gas when charged. Normal lead acid batteries do, and should not be charged in an enclosed room.

Here is ResMed's white paper on battery power:
http://www.resmed.com/en-us/products/se ... ttery.html
At the bottom of that page is a link to a pdf file that is very complete and describes exactly what you need.

All this will cost about $450-500. The pure sine wave inverters are pricey $130, and a charger meant specifically for a gelled or AGM battery will run about $100, the battery (50 amp hours or greater) will run about $130-180, and the ResMed cable is $80.

Hope that helps!

Humidifiers draw quite a bit of current, and if you don't use a humidifier, your battery will last much longer without having to be recharged.

If you absolutely must use a humidifier, your HC150 will work from the modified sine wave that is provided by normal modified sine wave inverters; this would save quite a bit of money.

Your S8 and HC150 can be operated together from a 300 vA or larger inverter. This would allow you to buy a less expensive inverter and you wouldn't need a DC cable for your S8. In this scenario you would need a battery, charger, and a 300 vA inverter.

If you don't use a humidifier, you will need a battery, charger, and DC cable for your machine.

OOPS! Sorry, I didn't notice that you were using a FP 150. Good humidifier.


Still, the white paper I mentioned does give good advice for using the S-8 with a battery. Mit pictures, too!

You were right; hobbs uses a Humid Aire 3 for traveling, the equipment list picture shows an HC150, which is used at home. I had missed the Humid Aire 3 until you mentioned it.