CPAP on an elk hunt power source.

[bowhuntingw]

Going on an elk hunt in a few weeks and am trying to see what the Cpap users do for their power source. I’m considering taking a 12volt boat battery I have and use a power converter. Charging the battery off of a generator when it’s in use. The speciality batteries for this purpose seem overly expensive for how long they last. Will be parking a truck at a cabin so toting a 12v battery is no big deal. Just not sure about all the different converters out there I guess.

[TexasCanesFan]

Here is a thread about this last year. I had it saved.

https://www.texasbowhunter.com/discussions/forums/forum/topics/around-the-campfire/872888-cpap-power-supply-for-hunting

[speck1]

My brother is taking a small Honda generator to use when we truck camp. Will see how it works for his CPAP shortly

[easeup]

the wifes unit with manufacturer supplied battery wont last 4 hours when off grid. So when traveling we have an inverter connected to an automotive 12v battery. Be sure and purchase pure sine wave inverters for the medical equipment. In your application you could recharge your boat battery with a generator or with your truck connected to jumper cables. I went ahead and got a little larger size inverter (2000w) so I can run power tools and coffee maker from the truck.
Just so you get a relative feel of power usage, her unit is a 65W cpap. It draws 1/2amp at 120v. The inverter changes the battery dc voltage to 120vac by taking 5.4amps DC at 12v from the battery to make 120v ac 1/2amp including inverter efficiency drop for the CPAP. Most boat batteries have about 90 amp hr capacity. Taking the 90 amp hour capacity and dividing by 5.4 amp draw, you get a run time of the CPAP for about 18 hrs before depletion.

[Outback]

I put this together to go with the deep cycle battery on my home generator.

Solar panel w/controller: $90 - https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1
Adjustable legs: $29 - https://www.amazon.com/gp/product/B0...e?ie=UTF8&th=1

I haven't tested it yet but the fully charged battery should run my Cpap for 1.5 nights. I will try to get this setup in the yard and do a test. Check back to see how it worked out. I do know that I HATE it when I lose power on my machine! Feel like someone has a pillow over my face so hopefully if works for a night.

[76aggie]

Over the years, I did a bunch of options. Done the truck battery deal as well as the CPAP battery deal. Still have to charge the CPAP battery. Easiest was a small Honda generator and a long extension cord. Works very well if you have a truck to bring the generator with you and put it out of camp so it does not bother anyone else. Ultimately, I got tired of hauling a CPAG around so I lost 65 pounds and no longer have sleep apnea. Good luck.

[Joingle]

I have one of the small power banks, much like the jackery brand. I don’t remember the brand that I have, but it lasts a long long time on a single charge when running my cpap machine. I’ve had to use it several times when our power has gone out at home. It works marvelously.

[Outback]

I have one of the small power banks, much like the jackery brand.

I used this last night in A/C mode last night and it lasted all night long with only one bar of power which came back. Waiting on a 12v cord to attach my solar panel then I will trial this over a week to see if my solar panel keeps up. Tonight, I will go for a 2nd night without recharging. I unpluged it when I woke up.

This is what I bought. https://www.amazon.com/dp/B0791Y1WSQ...roduct_details

[bowhuntingw]

thanks for the info

[bigchiefj]

I believe your system will work just fine since you have a generator. You won't have to worry about over discharging the battery. I tested my rig at home to verify it worked.

I've got 7 nights off a 12 volt deep cycle (approximately 85 amp hours) and a small inverter (300 watt). The battery could have lasted at least 3 more nights too. I did not run the heated hose or the humidifier though. I believe my Dad only got about 3-4 nights off a similar sized battery, but he was using the humidifier and a big power inverter.

I have since bought a 12 volt to 24 volt DC adapter since it's more efficient than a 12 volt DC to 120 volt inverter.

[bowhuntingw]

thanks i thing im going to try it.