lcirelli
Hackettstown, NJ
New Member
Joined: 09/17/2008
View Profile
Good Sam RV Club Member
 Offline
|
So we will have this new to us SunnyBrook Edgewater on Saturday. We want to go dry camping to a State park. Does anyone have any ideas of how my DH can hook up his machine to some power for 2 nights? The TT has 1 12volt deep cycle battery. I am really new to all this. Anyone have any suggestions??
2008 SunnyBrook Edgewater 266RBE
2011 F150 EcoBoost Super Crew Max Tow Pkg 3.73
|
Dennis Smith
Colorado Springs
Senior Member
Joined: 09/07/2007
View Profile
Offline
|
Sorry one 12 v will not power it for 2 night. You will be lucky to get a night out of one 12 v . Two should last one night with a inverter, but then you need to recharge for the next night. A generator is the only way you can do that in a timely manor. Unless you have a big solar system.
|
lcirelli
Hackettstown, NJ
New Member
Joined: 09/17/2008
View Profile
Good Sam RV Club Member
Offline
|
So would I need 2 batteries then and a generator? Do trailer's usually come with an inverter?
|
ut_pupcamper
Utah
Senior Member
Joined: 02/09/2007
View Profile
Good Sam RV Club Member
Offline
|
X2 we camp with a family that the wife uses a Cpap machine and even with 2 batteries it's pretty much dead by around 5 a.m. and the generator has to get started. Don't use any other power in the trailer and you could sleep in till 8. They're pretty much a power hog. You would probably do better with the 6 v batteries.
Don & Alice
Camping in and around Utah
2013 Rockwood 8286WS Diamond Package 5th Wheel
2003 Ford F350 Lariat Super duty Crew Cab
6 kids 3 grand kids a dog a cat and Titan the killer Chiweenie 
Camping in 2013: 10
Camping in 2012: 19
|
pianotuna
Regina, SK, Canada
Senior Member
Joined: 12/18/2004
View Profile
Offline
|
Hi Icirelli,
Many Cpap machines can operate on 12 volt power directly. That will be much more efficient than running on an inverter.
This article may help:
cpap power requirements
Regards, Don
Kustom Koach Class C 28'5" 256 watts Unisolar, 875 amp hours in two battery banks 12 volt batteries, 2500 MSW watt inverter.
|
|
|
tvfrfireman
Portland, Or
Senior Member
Joined: 08/21/2006
View Profile
Good Sam RV Club Member
Offline
|
Take a look at the cpap tag (somewhere on the machine) and see how many amp hours it uses every hour. Mine uses 8 amp hours every hour. If I sleep 8 hours I use 64 amp hours. Look at your battery and see how many amp hours it holds. I just use the pass over (no heat) with the humidfier due to it gobbling up lots of juice. We have two 12 volt deep cycle batteries and when boondocking, I only have to run the generator after the second day. We are careful with the lights and use led bulbs to cut down on the generator time. I do not know how big your trailer is but you might want to add another battery. Good luck.
|
Robbies grandpa
northern california
Senior Member
Joined: 04/29/2004
View Profile
|
The back of your CPAP machine should have an attachment for a 12 volt adapter that you can purchase. It plugs into a cigarette ligher or 12 volt power source. But you will need 2 batteries or make sure you charge the battery either with a generator or from your tow vehicle every day. They draw 3 amps, so you can do the math as to how much draw you will put on the battery. I use two 6 volt batteries and could probably go two days even using my heater.
|
Pangaea Ron
Anacortes, WA, USA
Senior Member
Joined: 12/20/2004
View Profile
Offline
|
I bought a rechargeable battery from Respronics that will last through the night (without the humidifier). I recharge it with the generator, or with a 12vDC outlet, or inverter while driving.
2008 Itasca SunCruiser 35L
2000 Jeep Grand Cherokee Laredo
|
Cedarhill
Deep South
Senior Member
Joined: 09/20/2011
View Profile
Good Sam RV Club Member
Offline
|
I have two CPAP machines, one of which is good for boondocking and the other one is not. My newest machine is a ResMed S9 series. It will not run on battery voltage directly but requires a pure sine wave inverter. The power consumption is 70 watts as measured by a Kill A Watt meter. That translates to about 7 amps battery current or one Group 27 battery discharged per night. I believe the majority of the power is consumed by the active humidifier. I don't use it on battery power.
The other machine is an old Respironics Remstar plus. It will operate directly from a 12V battery using a battery adapter made for the unit. It consumes about 0.8 amps average which is equivalent to 6 or 7 nights on a Group 27 battery. I believe the reason why it uses so little power is the passive humidifier. I don't like it as well as I do the ResMed but always use it when boondock camping.
My advice is to actually measure the power consumption of the CPAP before deciding what to do about it. Some units consume very little power and others consume a lot as my example shows. You might also check the technical specifications of the unit but I didn't find them to be very accurate.
By the way, what is the brand and model number of the unit?
|
a1albert
Hood river, Oregon
Senior Member
Joined: 12/18/2006
View Profile
Good Sam RV Club Member
Offline
|
with the right machine you can run for 2-4 nights on a rv battery. If you can get a 45 watt solar panel you can go forever. I made it 9 nights on a remstar apap machine, 18amp battery and two 12 watt solar panels. I was 10 miles from the closes 110 plug. The trick is to ditch the humidifier it uses a lot of power.
Albert
06 Chev
2013 Cougar High Country 299RKSHC
Elite 18k hitch, Sidewinder pinbox
|
|
|
