Resperonics Dreamstation battery backup project

Goofproof wrote:Your back will love the strain, the machine will love the vibration and the fumes, just a poor idea in general. Jim

What vibration and what fumes?

For those technically challenged they offer this.
http://www.batteryspace.com/lifepo4batt ... orage.aspx
Plus this for ac charging.
http://www.batteryspace.com/ac-dc-adapt ... ---ce.aspx

Let me ask this question. Is anyone honestly interested in this? If not I'll go to my own forum for this project.

Most here don't have unlimited funds to throw at a project, the best bang for the buck is what is needed most here. What's been post here is pretty dang good, and work well. Until I get my Zero Point Module perfected at least. Jim

Goofproof wrote:Most here don't have unlimited funds to throw at a project, the best bang for the buck is what is needed most here. What's been post here is pretty dang good, and work well. Until I get my Zero Point Module perfected at least. Jim

I actually just looked at gross income for year and I don't consider it much. I have bills and everything to pay, i own my own home with a mortgage and make gross around 40k and net around 32k. So with 32k I have to pay mortgage, taxes, bills and what not including what I have to live on. I assumed I should be the average person if not less. So If what I propose is to much let me know. Not everyone here is retired . Let me know if make to much money and I'll leave this place. I don't want to be over privileged. But if manage money better then you is it fair to hold that against me?

USMCVet wrote:

Goofproof wrote:Most here don't have unlimited funds to throw at a project, the best bang for the buck is what is needed most here. What's been post here is pretty dang good, and work well. Until I get my Zero Point Module perfected at least. Jim

I actually just looked at gross income for year and I don't consider it much. I have bills and everything to pay, i own my own home with a mortgage and make gross around 40k and net around 32k. So with 32k I have to pay mortgage, taxes, bills and what not including what I have to live on. I assumed I should be the average person if not less. So If what I propose is to much let me know. Not everyone here is retired . Let me know if make to much money and I'll leave this place. I don't want to be over privileged. But if manage money better then you is it fair to hold that against me?

Not holding anything against you, just stating the facts. Jim I even eat Butter on Rolls.

Goofproof wrote:

USMCVet wrote:

Goofproof wrote:Most here don't have unlimited funds to throw at a project, the best bang for the buck is what is needed most here. What's been post here is pretty dang good, and work well. Until I get my Zero Point Module perfected at least. Jim

I actually just looked at gross income for year and I don't consider it much. I have bills and everything to pay, i own my own home with a mortgage and make gross around 40k and net around 32k. So with 32k I have to pay mortgage, taxes, bills and what not including what I have to live on. I assumed I should be the average person if not less. So If what I propose is to much let me know. Not everyone here is retired . Let me know if make to much money and I'll leave this place. I don't want to be over privileged. But if manage money better then you is it fair to hold that against me?

Not holding anything against you, just stating the facts. Jim I even eat Butter on Rolls.

100% honesty here..... I'm not saying you are. I think that alot opinions here are closed minded and not open to change. So with 100% honesty if no one here is willing to change or listen to new ideas that's 100% fine. I'll leave and go to where people will listen. After all you have all answered all the questions possible and have nothing else to learn.

USMCVet wrote:... I think that a lot opinions here are closed minded and not open to change. So with 100% honesty if no one here is willing to change or listen to new ideas that's 100% fine. I'll leave and go to where people will listen. After all you have all answered all the questions possible and have nothing else to learn.

Oh My!

Its not that we are "closed minded," its that this issue has been discussed at great length. I would love for the new technologies to become more usable and less expensive, but the progress is slow. I've been watching the LiFePO4 batteries for several years but I have trouble recommended systems that aren't ready for prime time. I strongly encourage you to research this area fully, purchase some of the gear and report back with your findings. We eagerly await your report!

As to what most folks want for a backup battery, low weight is not a priority. In fact, I find the heavy battery reassuring because it won't be tossed in the closet - it sits right next to my night table and no one is going to move it! Light weight has its virtues, but not for a home backup, and not at a huge premium in price or complexity. For most car campers or boaters AGM batteries are a good solution - a little heavy but cheap. There are numerous LiPo offerings now that seem to work well for one or two nights of airline travel or hiking away from a campsite where the light weight is worth a premium in cost.

Most of the folks here are looking for a simple, well packaged solution - even a battery with a separate charger is more than many want, which is why UPS's and jump starters have their advocates.

A particular priority for me is being able to charge from a "normal" charge source, including a car alternator or an automotive charger. LiFePo4 batteries have shown promise in this area, but most of the "hobby" offerings don't have the full battery management systems that permit "drop in replacement" or they are very expensive.

CapnLoki wrote:

USMCVet wrote:... I think that a lot opinions here are closed minded and not open to change. So with 100% honesty if no one here is willing to change or listen to new ideas that's 100% fine. I'll leave and go to where people will listen. After all you have all answered all the questions possible and have nothing else to learn.

Oh My!

Its not that we are "closed minded," its that this issue has been discussed at great length. ...

Agreed on this being covered at length, there's not much new going on here. I already put forth my preference for such a project - A modular AGM solution where the capacity can be matched to need. As far as change or new ideas, I have solutions for ground travel, air travel and home use. I have solar panels, Lipo, LiFePO4, AGM, I have a few thousand VA of UPS power, so come up with something different that I didn't know I needed and I'm likely all for it. If you prefer the "I'm taking my ball and going home" approach, well that works for me too.

Thank you that's all I needed to know.

CapnLoki, you wrote:

...ResMed units that run on 24 volts and require a special signal in the plug. Although its possible to hack a plug that works, most people are content to use the DC/DC converter from ResMed.

I just got a Resmed Airsense 10, and will want to use it on my boat, and was thinking that I could just series my two 12v batteries, or get a pair of smaller dedicated 12v AGMs to be independent. I hadn't realized they had this signal circuit, and I see the small pin in the center of the connector, so wonder if you or anyone else knows what that signal is and what the machine it is doing with it. Can you direct me to information about this hack or to a source to the plug, as that $90 for the DC to DC converter feels steep, like all this cpap gear. One can get a 12v to 24 v DC step up for about $15, but using series 12v batteries seems better if one is building a battery system or on a boat that already has two batteries.

Thanks

What would be better would get a 12 Volt XPAP, that wasn't screwed up with a unnecessary signal, so they can sell overpriced accessories. Jim

If you are willing to buy their price controlled products, just break out more for their accessories.

Yeah, I may just use my old Respironics machine with its dead humidifier on my boat, as I never used the humidifier on battery anyway.

The real reason for all the cost issues with this gear is the same problem with all healthcare costs, in that its all determined by negotiations between providers and insurers. They picked this new machine for me and paid for it, if I had to pay $900 for this thing myself I'd just stick with my 10 year old machine and its now passive humidification system, or shop around for something much cheaper. Tho, I'm pretty stoked after even just one night with its auto humidifier, heated hose, quiet operation and wireless data.

On another note I found this thread which explains some of the 3.3v hack:
viewtopic/t156100/Homebuilt-12V-Convert ... se-10.html

nesdon wrote:Yeah, I may just use my old Respironics machine with its dead humidifier on my boat, as I never used the humidifier on battery anyway...

Yes, that would be the best approach. There have been several discussions on how to hack the interface. However the net savings isn't that much, and you're left with a pile of wires with no backup if it fails! I prefer to think of the ResMed DC converter as a surcharge for the privilege of using ResMed instead of Respironics. (And I'm thankful my DME gave me a Respironics when I didn't know any better!)

More like SurOVERcharge, for the privilege of using ResMed price fixed products. Jim