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I felt like I was hijacking / monopolizing this awesome CPAP discussion: How to power a cpap
... so I thought our of respect for the guys in that thread, I'd start my own thread.
Short Details:
The SF Bay Area has had a lot of blackouts and my girlfriend's elderly Grandfather wants a battery backup for his ResMed AirSense 10 Elite CPAP machine.
... with these components:
So, what's wrong with this idea? PLEASE poke holes at it! Tell me what could be missing / wrong with it?
Thanks in advance!!!
... so I thought our of respect for the guys in that thread, I'd start my own thread.
Short Details:
The SF Bay Area has had a lot of blackouts and my girlfriend's elderly Grandfather wants a battery backup for his ResMed AirSense 10 Elite CPAP machine.
- He wants it to basically act like a UPS where he's got it plugged in all the time
- He'd like it to last 2-3 days with the humidity / heater on (if I'm reading the threads correctly, this uses about 200Wh per night)
- This unit uses 24v
- Computer UPS systems (under $500) don't seem like they are made to run for multiple days in power outages
- All the "power stations" I've seen aren't made for this 24/7/365 kinda use. I even emailed EcoFlow and they discouraged me from using their system as a long-term DC UPS.
... with these components:
- Cheap AC wall adapter set at a voltage that keeps the battery (LFP, Lead-Acid, whatever) at a safe "topped-off" level. For example, maybe somewhere between 13.2 - 13.6v for LIFEPO4 (as discussed with @Will Prowse in his interview with BattleBorn here. - $25
- Battery - LifePo4. A 50 Ah battery should easily last 2 nights with humidity and heater on the CPAP. - $180
- CPAP DC Converter- Gpa's Resmed Airsense needs 24 volts with a "special" adapter. This adapter can safely take anything from DC: 12V-24V (9–32V DC MAX) and put out the needed 24V DC: - $32
- Plug: Something like the following that will make it easy for the CPAP adapter to plug into, while also displaying the voltage, and providing USB ports (bonus)! - $17
So, what's wrong with this idea? PLEASE poke holes at it! Tell me what could be missing / wrong with it?
Thanks in advance!!!