http://store.foodforhealthinternational.com/Humless/Humless-Power/Humless-Roadrunner.html Be Ready Hawaii sells this unit.

Alright so I'm really math and electricity dense and I'd appreciate if anyone wants to do some of this homework for me, my dilema is this: I'm leaving to Cali for several days on 4/11 and it involved sleeping in some tent April 12, 13, 14, and 15th. I'll be on the plane and back home on the 16th.

I have sleep apnea and will have to bring my CPAP to get any sleep (also to not wake everyone up around me).

This is the CPAP I own with specs below

http://www.cpapwholesale.com/devilbiss-IntelliPAP.htm

I'm looking for something portable that will run my CPAP for the 4 nights I need to use it. I'm guessing 1 night is 5 - 7 hours.



5 - 7 hours a day use

CPAP (from link above) :
•Operating Voltage: 100-240 Volts AC 50/60 Hz, 120 Vac 400 HZ
•Power Consumption: 65 Watts Maximum
**(mine is set at 11 out of 20, so probably not going to hit max)


Humless Roadrunner specs (from link at top):
 •10Ah Lithium Battery provides 120Wh of power
 •Integrated 5A smart-charger with PWM high efficiency charging
 •200W Continuous / 400W peak 120VAC Output (Modified Sine Wave)
 •2.5w 18v Mono-crystalline Solar Panel with tempered glass face



I don't even know if those are the numbers I need to look at to see if the Humless Roadrunner will fit my needs for the week.

Coachella allegedly has a charging area for people to charge their electronic shit at, so I might be able to go there for a bit to help charge. 2.5watts solar panel sounds abysmally low. Like it would take 2 days to charge to full.


Or, if anyone has a suggestion on a portable power supply that I can take with me that will run my CPAP for the 4 nights I need to use it for, I would greatly appreciate that as well!

I leave in 2 days!

Eh I called Be Ready Hawaii and basically committed to buying it already. But if anyone wants to take a crack at the math please do!

Try calling the place where you got your CPAP from or other home health cos and ask for suggestions/alternatives.  I know Respiratory Home Care Specialists and Apria provide CPAP machines for ppl.  Good luck.

I actually called Resp Home Care Spec. Said they no more and that I had to call the manufacturer.

I called ACE and all they have is a $450 option made specifically for CPAPs. If I'm going to spend close to $450 for a highly specialized machine, I might as well get a $550 unit that can be used for all sorts of things.

Didn't try Apria though!

Eh I called Be Ready Hawaii and basically committed to buying it already. But if anyone wants to take a crack at the math please do!

I like try take a crack!

2.5 watt solar panel will take 48 hours of (peak) sunlight to charge the 10Ah battery assuming the battery is completely drained.  Wattage ratings of solar panels are typically peak ratings. 

65 watts power draw from the 10Ah battery will run your unit for around 110 minutes, or just under 2 hours.  Or, calculating that 11 out of 20 uses 55% of peak, then you will have roughly 201 minutes, or 3 hours 20 minutes.

My suggestion would be a larger battery, at least 26 Ah, and a larger solar panel, at least a 48 watt, which would recharge the 26Ah battery in 6.5 hours, assuming peak sunlight.  This set up will run your unit around 8.7 hours with your setting of 11 out of 20.


I was looking at the Humless Sentinel with the 90 watt solar panel ~ $2,100.00.  I calc'ed usage at peak load to be 36 minutes since the Sentinel only has a 50Ah battery.  Definitely not worth it IMHO.  I just ordered parts from Amazon for around $600.00 less the batteries which would add a couple hundred to a few hundred depending on the usage time desired for a system that would provide quadruple the power of the Sentinel.  Of course I will need to build a box to house the parts . . .

My suggestion would be a larger battery, at least 26 Ah, and a larger solar panel, at least a 48 watt, which would recharge the 26Ah battery in 6.5 hours, assuming peak sunlight.

Just thought of additional stuff . . .

The above "upgrade" will most likely not work with the Humless Roadrunner since it is self-contained and the battery & solar panel is much larger which may not work with the Humless' internal charger and inverter.

Simplest solution is to camp very near the 120 plug in station and run an extension cord to your unit.

Or get an inverter for your car and leave the key switch in the accessory position.  Just need to ensure that the inverter can handle the required power output and that the car does not have a tiny battery.  And start the engine every morning to recharge the battery.

Wow damn that's good lol.

The unit comes with a regular power cord for charging and there are also contact points on the top which you can use to use the included cigarette lighter charger thingy.

Thanks for the advice man! I'll have to get into a solar project later at some point!

Wow damn that's good lol.

The unit comes with a regular power cord for charging and there are also contact points on the top which you can use to use the included cigarette lighter charger thingy.

Thanks for the advice man! I'll have to get into a solar project later at some point!

Anytime Dregs!  They don't call me wirecounter for nothing.  LOL

Have fun camping & don't get eaten by any bears.