Do you use a battery backup? if so what type?

billbolton · Post by **billbolton** » Sat Mar 28, 2009 7:45 pm

builta wrote:So if I use my unit with the humidifier:
-- 18.5 AMP-Hour Battery running at about 5 amps = 18.5/5 or 3.7 hours run time (or more based on your pressure and Humidity setting)
-- 26.0 AMP-Hour Battery running at about 5 amps = 26/5 or 5.2 hours run time (or more based on your pressure and Humidity setting)
-- 35.0 AMP-Hour Battery running at about 5 amps = 35/5 or 7 hours run time (or more based on your pressure and Humidity setting) (Sweet spot - 12 Volt Golf Cart Battery size)
-- 55.0 AMP-Hour Battery running at about 5 amps = 55/5 or 11 hours run time (or more based on your pressure and Humidity setting) (12 Volt Cheap Automotive Battery size)

You need to cut all those times at least in half if you want the battery to have any useful life.

Fully discharging any sort of lead acid technology battery is a sure way to kill it.

Even the "deep discharge" capable lead acid batteries should not be discharge below 50% of capacity if you expect to get a worthwhile service life from them. A "12 Volt Cheap Automotive Battery" should not be discharged below about 90% of capacity.

Cheers,

Bill

builta · Post by **builta** » Sat Mar 28, 2009 8:37 pm

volkrt wrote:so how many amps per hour does the m series with humidifier draw?

Hi,

You know, I'll have to go look at mine and rig up an amp meter.

So for now here is my purely mental guess, the manuals indicate the following: BiPAP 3 AMPs Max at 12 volts and Humidifier 4.16 AMPs Max at 12 Volts.

The Respironics information that comes with the 12 volt power cord indicates that I should use a 7 AMP fuse in the power cable. So, if this indicates relative maximum power consumption, then the humidifier running (at a setting of 5) can use about 1.4 times the power that can be consumed by the BiPAP (if it was running at 25 cm H2O). If I assume that you are running you XPAP at about 10 cm H20 and the humidifier is running at a setting of 5 then the humidifier would be still drawing the 4.16 APMs but the XPAP would be lower. So, it is probably safe to say that using the heated humidifier will double to triple the power consumed--as compared to using the XPAP alone or with a passive humidifier.

volkrt · Post by **volkrt** » Sat Mar 28, 2009 8:43 pm

Greatly appreciate all the info all.......I usually run my humidifier at the lowest setting but its good to calculate the draw at max amps to be safe.....mainly i'm just looking for something that will cover the rolling blackouts we get here sometimes ...but if I was traveling a lot o'd definitely go with somthing like that duracell or a true cpap travelling battery...thanks again all for the great info

builta · Post by **builta** » Sat Mar 28, 2009 8:51 pm

billbolton wrote:
builta wrote:So if I use my unit with the humidifier:
-- 18.5 AMP-Hour Battery running at about 5 amps = 18.5/5 or 3.7 hours run time (or more based on your pressure and Humidity setting)
-- 26.0 AMP-Hour Battery running at about 5 amps = 26/5 or 5.2 hours run time (or more based on your pressure and Humidity setting)
-- 35.0 AMP-Hour Battery running at about 5 amps = 35/5 or 7 hours run time (or more based on your pressure and Humidity setting) (Sweet spot - 12 Volt Golf Cart Battery size)
-- 55.0 AMP-Hour Battery running at about 5 amps = 55/5 or 11 hours run time (or more based on your pressure and Humidity setting) (12 Volt Cheap Automotive Battery size)
You need to cut all those times at least in half if you want the battery to have any useful life.

Fully discharging any sort of lead acid technology battery is a sure way to kill it.

Even the "deep discharge" capable lead acid batteries should not be discharge below 50% of capacity if you expect to get a worthwhile service life from them. A "12 Volt Cheap Automotive Battery" should not be discharged below about 90% of capacity.

Cheers,

Bill

Hi Bill,

I absolutely agree with you. I have a spare 55 AH AGM battery that I am using and I have it as a backup only. As you may know, the AGM type Lead Acid battery are expensive but also the most forgiving. The main point was trying to show that these machines (especially with heated humidity) use alot of battery power to make it through the night.

builta · Post by **builta** » Sat Mar 28, 2009 9:04 pm

robertmarilyn wrote:
builta wrote: Check this one out at about $140 for a 28 Amp-Hour (600W series) (should runabout 6 hours on a full charge if using xPAP and heated Humidity on M-Series setup and direct DC - no inverter)
://www.amazon.com/Duracell-DPP-600HD-Power ... sim_auto_2
How many hours would this run my S8 Autoset II without the humidifier? I need a battery option that can last almost a week at a time. It doesn't have to be light since I will carry it in my horse trailer with living quarters. My living quarter batteries will be used for providing hot water and some lights and the water pump...I do have a solar panel on my rig that usually recharges my rig batteries enough to keep me in hot water and some lights. My battery for the APAP needs to be in the LQ with me so I would want it to be sealed.

So my APAP is going to get it's own battery setup. I think I will need this DC to AC Pure Sine Wave Power Converter for Resmed S8 Machines
https://www.cpap.com/productpage/DC-to- ... or-s8.html
and the optima yellow top battey?
http://www.optimabatteries.com/optima_p ... lowtop.php

Does that sound right? I have been reading the posts on this forum about this esp the ones that restedgal has gathered or written. I will need my battery setup in about 3 weeks so I am going to have to get all of this figured out soon. I usually travel with my horses at least once a month so this isn't going to be a one time thing.
Thanks to anyone who can help me and special thanks to anyone who keeps the info in really really simple terms
mar

Hi,

If you are going to by out and about without access to power for a week, then you had better look into getting a set of 6 volt Heavy duty batteries and have them hooked up like a RV. I don't have the unit that you have but, I think that you need a special 12 volt convert.

I suggest that you need to talk to an RV dealer.

If you run an inverter you'll need about 50% excess capacity to deal with the losses of the inversion process.

Also keep Bill's comments regarding how far you can discharge the batteries.

oh_possum · Post by **oh_possum** » Sat Mar 28, 2009 9:24 pm

For my machine, I needed something like this: http://www.dcacpowerinverters.com/custo ... 30012-8AWG. I attached it to an Optima marine battery and I could run it for three days if needed. I live in the woods and we have had 3-day outages before so I figured I better be prepared. I don't need the inverter for the new machine I'm getting but it's nice to have because I can use it for anything.

robertmarilyn · Post by **robertmarilyn** » Sat Mar 28, 2009 9:34 pm

builta wrote:
Hi,
If you are going to by out and about without access to power for a week, then you had better look into getting a set of 6 volt Heavy duty batteries and have them hooked up like a RV. I don't have the unit that you have but, I think that you need a special 12 volt convert.
I suggest that you need to talk to an RV dealer.
If you run an inverter you'll need about 50% excess capacity to deal with the losses of the inversion process.
Also keep Bill's comments regarding how far you can discharge the batteries.

Ok, thank you. Eventually I may get a different APAP for travel to get around the extra drain of an inverter. I do take a generator to recharge my LQ batteries if I have time during the trip (I'm out there riding my endurance horses 50+ miles a day and sometimes don't get back to the rig until it is too late or I am too tired to turn on the generator before the cut off time for running the generators.) I will speak to an RV dealer about all of this (probably the folks that installed my solar panels) and have them help me set things up. I should have paid better attention in my basic electronics course in college...but I think I was too tired to do so since I was born with sleep apnea and it wasn't officially diagnosed until I was 38.

Appreciate your help,
mar

robertmarilyn · Post by **robertmarilyn** » Sat Mar 28, 2009 9:44 pm

oh_possum wrote:For my machine, I needed something like this: http://www.dcacpowerinverters.com/custo ... 30012-8AWG. I attached it to an Optima marine battery and I could run it for three days if needed. I live in the woods and we have had 3-day outages before so I figured I better be prepared. I don't need the inverter for the new machine I'm getting but it's nice to have because I can use it for anything.

Hey, thanks for that info. I'm gathering it all together because I'm going to get to work on this next week. We have had 12 hour power outages out here where I live and I'm planning to use my setup to get me through the night if I need to do so. I'm going to take my humidifier on the trips but not turn it on...just let the air flow pass over the water.

mar

sam1234 · Post by **sam1234** » Sun Mar 29, 2009 12:35 am

Why don't you look into using the ResMed DC-12 converter? https://www.cpap.com/productpage/DC-12-Inverter.html

It is more efficient than an inverter, and is designed for use with the autoset II. It is not inexpensive at ~$80 but is less costly then some of the previously mentioned options.

robertmarilyn · Post by **robertmarilyn** » Sun Mar 29, 2009 7:12 am

sam1234 wrote:Why don't you look into using the ResMed DC-12 converter? https://www.cpap.com/productpage/DC-12-Inverter.html

It is more efficient than an inverter, and is designed for use with the autoset II. It is not inexpensive at ~$80 but is less costly then some of the previously mentioned options.

That's what I need! It says I can use it as long as I don't need to use the humidifier. And it costs less than an inverter. Thanks for showing that link to me.
mar

Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Re: Do you use a battery backup? if so what type?

Machine	Mask

Additional Comments: Airmini, Medistrom Pilot 24, CMS 60C Pulse Oximeter, ResScan 6