Oxygen concentrator in a cabin/power requirements

[RainbowFish]

Hello!  I am looking for some advice re minimum power requirements for an O2 concentrator.  I presently use APAP and am borderline for supplemental O2 at night where I live at 7000 ft in altitude.  My family has a cabin at 9000 ft where I would like to stay overnight, but its only power is a solar panel/golf cart battery set up that barely works the K-cup machine.  So, I am committed to buy a power station battery to use both there and as backup for power outages at home for the APAP, but from what I can glean from my research oxygen concentrators are power hogs.  

The O2 concentrators I have are a Respironics Everflo and a Caire Freestyle Comfort portable (the latter I inherited from my mom who needed O2 during the day, and I think it only pulses).  At least at 7000 ft my O2 requirements are minimal - maybe 1 liter - but I have not tried 9000 ft yet.  

Thank you for sharing your knowledge and experience!

[clownbell]

My wife has a DeVilbiss stationery oxygen concentrator and the owners manual says that the unit uses 275 Watts @ 1 .2 LPM & below, and 310 watts as an overall average. I would assume that if power usage is nigher if you are using 4-5 LPM. It may be worthwhile to contact the manufacturer and ask for power requirements at various whole-number settings. That may provide some data that will be significant when you purchase a backup batter.

Another idea: the folks at the Oxygen Concentrator Store (you can guess the URL but I can't post it here) may be of help.

[RainbowFish]

Thank you for the suggestion! I will get in touch with them.