[Equipment] 12 volt adapters

[roadkingrick]

So ive been on a machine for 12 years or more and I love my machine, but... I bought an adapter ( 12volt ) cigarette plug for camping and travel. They are expensive. I am a resmed user so Ive purchased on for an s8 then an s9, now im on an s10 and so is my wife. There has got to be an adapter for the other power bricks so you can use them for different models, same brand. 85 to 100 bucks is crazy when ive already got two of these that have little to no use. Anyone got a solution or ideas?

[OMyMyOHellYes]

In a general sense, as you are a Resmed user, you are pretty much up Schlitz Creek without a paddle.

Resmed has always (at least since the S8) been kind of devious regarding the 12 V adapters.  The S8 was a 12 V machine, but the plug/receptacle was wired backwards from most standard plugs (the + terminal was on the outside of the coax plug sleeve, not on the inside like most all other setups.  And the S8 might just very well crap out if you used a standard plug adapter.  Bonus for Resmed!  You get to buy a new machine from them!

With the S9, they went to a totally different and non-standard plug.  AND they started using 24 V systems.  But the evilness didn't end there.  Even if you got a 24 V battery and somehow got a plug that would work in the socket and wired it up right, the S9 would still be dead.  See, those little minions of darkness made it so that the machine is looking for a signal on one of the other pins in that socket.  And if it didn't see that signal then the machine would not start, even though it had perfectly good power.  Another bonus for Resmed!  You have to buy their $100 USD 12/24 V DC-DC adapter to run your machine off of a battery!  Bonuses all around the Resmed offices!  Yay!!!!!! Same same when they went to the S10.  But, wait, Alex, there's more!  With the S10 they used an even different plug setup!  So even if they had suckered you out of $100 if you had an S9 adapter, you got to buy another new $100 S10 adapter!!!  More executive bonuses!!!  Got those stupid customers to shell out even more money for no good reason whatsoever!

If only there was some other PAP manufacturer out there that respected their customers a little bit and didn't play those games to take advantage of the customers.  A company like maybe PR?  Or DeVillbiss?  That would be cool.....  (One of the reasons I won't willingly buy or use another Resmed product.)

[PoolQ]

might suggest that you just buy a pure sine wave inverter and plug both S10's into that and you wont ever have to worry about DC adapters again. Just a thought.

[OMyMyOHellYes]

What ever you do, if you can possibly afford ANY other option, is to avoid inverters. Particularly with TWO machines plugged in. Unless you have a three-ton portable battery..... They are just WAY too inefficient and if you are operating off of a battery, I have to expect your power supply is from a limited capacity battery and you would want to save as much of that supply as possible.

And all the chatter about "pure sine wave" is bunkum. A CPAP machine couldn't care less... For whatever diety's sake you may subscribe, the current goes back through a converter to turn the power back into DC!!! The CPAP never sees any of it! It is all marketing from some slightly ethical appearing computer UPS marketers.

[DaveL]

Thanks for your responses here.

I've used a surge suppressor for several years. It has an extension cord. This combo saved my machine once.

Now I've wondered if I should get a battery back up, so I'm following threads. This one interested me.