Cpap operation

Through much research it appears operating the Remstar plus machine could possibly be damaged on the modified sine wave inverter.  There is a 12v adapter that could be used but the receptacle is in the over the passenger seat cabinet , too far for the 12v cord to reach the bed.  I understand no problem if on shore power, but drycamping, it would go through the inverter.  There used to be transformers that converted 110 to 12v and a 12v receptacle could be attached.  If I used the outlet in shirt closet, the length of cord would be adequate.  I guess the question is, what options would anyone suggest regarding using the MSW inverter for cpap as well as possibley installing 12v receptacle in bed area.  Thanks, larry

It is very easy to add a 12v receptacle almost anywhere in a Phoenix.   Don't forget, all the lightning is 12v as are any powered roof vents and the furnace and water pump.

Should be less than $100 for an RV shop to install or way cheaper if you are handy at that sort of thing.

Might want to investigate battery backup unit for remstar. The battery lasts 10-12 hours on a charge. Battery can be recharged in 12 volt while traveling .  I bought mine at CPAP.com

Prior to buying the battery  pack  I used the inverter for several years on multiple occasions without any apparent effect on cpap  unit.

You can ask PC to upgrade the inverter to a pure sine wave.  We did that because we were worried about our electronics.

Thanks for the suggestions of dealing with the cpap power.  It's good to know that it has operated sucessfully on MSW inverter.  Installing 12v receptacle connected to one of the many 12v items is a good idea as well.  I have found a 110v converter to 12v with receptacle at reasonable cost.  Now perhaps someone can shed some light on the current draw if it were plugged into inverter in shirt closet to provide the 12v service.  It may be too much drain on the batterys and it does seem silly to go from 12v to 110 then back to 12v.  Thanks, larry

Thanks for the suggestions of dealing with the cpap power.  It's good to know that it has operated sucessfully on MSW inverter.  Installing 12v receptacle connected to one of the many 12v items is a good idea as well.  I have found a 110v converter to 12v with receptacle at reasonable cost.  Now perhaps someone can shed some light on the current draw if it were plugged into inverter in shirt closet to provide the 12v service.  It may be too much drain on the batterys and it does seem silly to go from 12v to 110 then back to 12v.  Thanks, larry

Look at the wattage on your CPAP unit.   Volts times Amps = wattage.   Or.. Amps = wattage/volts.  Lets say it's a 30 watt device... Then using 12v power that woyld be 2.5 amp draw.   Using 120v power, it'd 1/10th of that or 1/4 amp draw.   Add 10% to 15% to that for inverter/converter loss.   So in my example it'd be 3 amps at 12v or 1/3rd amp at 120v.

If the CPAP unit takes 120 watts of power... Then 1.1 amps needed at 120v or 11 amps needed at 12v.


Make sense?

Donc13, I certainly appreciate your explanation....unfortunately it was way beyond my paygrade. Through research I have determined that running machine on 12v is the way to go.  Through my exploring the various systems, it appears there are several 12v (lugs for lack of better explanation) that are not being used in the bottom of of the electrical panel at foot of bed.  It further appears that each of these could be fused.  The question now is would it be possible to tie into one of these allowing for 12v receptacle to be mounted on side of bed support?  The proximity of that receptacle would allow the machine to be placed in the overhead cabinet at head of bed.

Morning. My husband has Bipap unit he must use when sleeping... so with out 2910 we had a elec plug installed by his side of bed and earl had the wood workers make a great shelf to put the unit on in the corner above the head of the bed. The shelf should have been just a tad bigger and not so closely installed in the corner since there is a widow with its trappings in this corner... When we are on the road I move the unit which is bigger than a cpap to the bed to rest. This has worked very well for us. And the shelf is beautiful... I wanted one for my side for my hanky and my water bottle but its been slow coming... Jim talked to parts and may be getting the brackets so he can make the shelf to match... We had several additional elec plugs installed. We also have a 50 Amp unit... so adding elec plugs meant no overloads.

Regards
Patricia

P S We use generator for power when on road and no other option. Do not really dry camp.

Donc13, I certainly appreciate your explanation....unfortunately it was way beyond my paygrade. Through research I have determined that running machine on 12v is the way to go.  Through my exploring the various systems, it appears there are several 12v (lugs for lack of better explanation) that are not being used in the bottom of of the electrical panel at foot of bed.  It further appears that each of these could be fused.  The question now is would it be possible to tie into one of these allowing for 12v receptacle to be mounted on side of bed support?  The proximity of that receptacle would allow the machine to be placed in the overhead cabinet at head of bed.

Yes, that can be done.