need infos about use Resmed S9 an a car, 12V DC

Hi,

I will make my next vacation-trip, so as the last 3 years, into the US. Visit the 4-Corner-States and a little bit Nevada.

So I will have a rental car from Alamo in Denver, CO, for my trip. I will sleep in my car, so I will use the S9 with 12V DC.

For other Resmed CPAP are Powersupplies available, but I dont read something about an 12V DC solution for using in an car.

Does anybody have some infos about that?

Regards,
Astrophytum

You should be able to use an inexpensive inverter from the car's 12V DC. Here is the page from ResMed's site that discusses your options.

http://www.resmed.com/us/service_and_su ... c=patients

Hi Slartybartfast,

thank you for the lnk, I know this.

I have found a converter from 12V DC to 24V DC, 6Ampere, for Laptops. It's very cheap, only 29.–Euro.

Regards,
Astrophytum

Astrophytum wrote:I will sleep in my car, so I will use the S9 with 12V DC.

Depending of the state of the battery in your rental vehicle, you may have problems with doing this.

The "cranking" batteries fitted to most standard US automobiles are designed specifically for starting the engine, and not for powering accessories over hours of time. They should not be discharged below about 90% of full charge, and using any xPAP overnight off the car battery will certainly discharge a normal US automobile battery by significantly more than that. If you happen to get a rental vehicle with a "weak" battery, you may find you are unable to start the vehicle in the morning.

Resmed is due to deliver a 12V DC adapter for the S9 around December, but have already slipped the delivery schedule a couple of times, so no one knows for sure when it will appear. Right now you need to use an inverter to generate 120V AC from the vehicle battery.

Cheers,

Bill

I'd be afraid to blow it up!
A while back, there was indication that there would be a DC cord for the S9 series.
I see now that is not going to happen.
You need to invest in a deep cycle battery and a very pricey dc converter (perfect sine wave-not chopped wave)
Failing that, there are travel CPAPs made by other manufacturers, which will work off your lighter with a very inexpensive cord.
You would then have a back-up machine in case of a power outage at home.
I'm pretty sure you will not be able to haul a deep cycle battery onto an airline.

chunkyfrog wrote:I'm pretty sure you will not be able to haul a deep cycle battery onto an airline.

I don't know about international flights, but I just used my cpap.com battery on a plane coming back from Hawaii with no issue at all... as usual, the TSA simply swabbed my cpap machine, but didn't give a second glance to the battery pack. This was used with my S8 backup machine with DC cable... not sure if you could use an inverter to work with the S9 with this setup or not.

Astrophytum wrote:Hi Slartybartfast,

thank you for the lnk, I know this.

I have found a converter from 12V DC to 24V DC, 6Ampere, for Laptops. It's very cheap, only 29.–Euro.

Regards,
Astrophytum

Hi,

I can't remember where I read it, probably somewhere on this forum but, I was left with the impression that a generic 12V to 24V adapter was not as straight forward as it might appear. As I recall, something about the wiring in the plug made the S9 "aware" that it was not attached to a Res Med power supply and the unit would not work.

In any event, I hope you have a great vacation and find a suitable answer to your power needs.

Hi,

I can't remember where I read it, probably somewhere on this forum but, I was left with the impression that a generic 12V to 24V adapter was not as straight forward as it might appear. As I recall, something about the wiring in the plug made the S9 "aware" that it was not attached to a Res Med power supply and the unit would not work.

In any event, I hope you have a great vacation and find a suitable answer to your power needs.

Thank you for this and all other answers.

Well, when the S9 will only work with power supplies from Resmed, then Resmed do this to make enough money...

Lets have a trial with my power supplies for my laptop.

I'm not sure, but my SUV, Hyundai Santa Fe, from Alamo has a deep discharge protection and they must have an 110V~ wall outlet.

When I use the S9 without H5i and ClimateLine, I need a power of max. 30W.

I don't need a very expensive sinus converter...

I have good conection to Alamo in Denver, CO. I will ask for the battery in teh car, a deep discharge protection, 110V~ wall outlet, and, if they can install an extra battery. I sure, I'm not the only that asking for this.


Regards,
Astrophytum

Resmed isn't a power friendly XPAP, in general the standard for power is 12 Volt D.C., Center Pin Pos. Resmed doesn't do that, figure. Jim

The odd's of getting a car rental place to customize a car for you is very low. Maybe renting a limo is a option.

Hi there
Why don't you rent a small motorhome instead of a car. That way you have all the hook-ups you need with a sine wave inverter connected to the coach battery. You would also have a bed, kitchen and bathroom....bonus. We have small motorhomes here than are no bigger than a van just like your camperized VW van.
Happy holidays.
Nan

I like the way Nan thinks.
The camper would be like a portable motel room.
Afterward you would wonder why you ever considered anything else!
No horrible public rest rooms--no cramped naps I'm sure you would love it!
Breakfast wherever you wake up!--What a life!
We 'camped' in the parking lot of Mall of America in Minneapolis.
Folks park campers in parking lots everywhere.

chunkyfrog wrote:We 'camped' in the parking lot of Mall of America in Minneapolis.

You are a brave soul to spend the night there.
Not the best of places.

This was over 20 years ago--probably wouldn't do it today--
besides the camper only got 4-5 mpg. When we got home, we parked it.
It was sick.

Goofproof wrote:Resmed isn't a power friendly XPAP

No more or less than other vendors.

Goofproof wrote:in general the standard for power is 12 Volt D.C., Center Pin Pos.

No, in general its about 50/50 about whether the pin is positive or negative.

Cheers,

Bill (IEEE)

Just received an e-mail from a customer servive representative at Resmed, she said they just released the S-9 converter. I didn't get a part #, she just said to refer to battery guide, It does not list a part # either. Playing phone tag with her. If anyone else has a contact with a Resmed rep. maybe they could call and get part # and retail price. I guess it will be $100/$125 by comparing it to the S-8 converter (12 v) and the VPAP (24 v) retailing at $79 and $89. Shouldn't be any different than the 24 volt VPAP one, just a different connector, but they probably did something to make it take more than a connector change to make it work with the S-9. I bet their ego will request a higher price in comparison to the previous ones. john