I'm on a boat!

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
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CapnLoki
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Re: I'm on a boat!

Post by CapnLoki » Fri Sep 01, 2017 12:59 pm

Doorman60 wrote:I am on a boat as well.. I've plenty of power but my HDM Z1 cuts out after being plugged in for a minute. I was told it cannot handle the Marine deep cycle batteries. What can I do? Can I runa converter from DC to Ac and then plug it in with the AC?
You'll have to give us a bit more info on your setup. Are you using the HDM 12V power cord? Do you have the battery? Although they seem to imply this works, I've wondered how this works when the power supply is (I think) 15 Volts. In one place the doc implies it only works for charging the battery, in other places is says you can run off a car battery. You might measure the voltage at the Z1 in case the wiring is dropping the voltage below the cutoff point.

Since the Z1 is rather low power, there shouldn't be much problem using an inverter (12V to 120 Volt AC converter) with the regular 120 volt power supply. If you're using a typical marine deep cycle battery you have about 100 Amp-hours and the Z1 should take about 6 amp-hours when powered through an inverter, so that should work out as long as you recharge in the morning.

BTW, I live on a boat most of the summer, powering a cpap with deep cycle batteries, charged mostly with solar power. I use a Philips Respironics 560 which is identical to my home machine. I can run it directly from 12 Volt and without the humidifier it uses 4 amp-hours a night. The Z1 is handy when you're trying to travel light, but there's no reason to pay a premium for a stripped down unit on a boat.

_________________
Machine: DreamStation Auto CPAP Machine
Mask: Quattro™ Air Full Face Mask with Headgear
Humidifier: DreamStation Heated Humidifier
Additional Comments: Pressure 9-20, average ~9.5; often use battery power while off-grid
Hark, how hard he fetches breath . . .  Act II, Scene IV, King Henry IV Part I, William Shakespeare
Choosing a Battery thread: http://www.cpaptalk.com/viewtopic/t1140 ... ttery.html