My CPap machine takes 24 volts. 72 watts should be sufficient. How big a battery would be required to run my ResMed CPap for 7-8 hours?
324677
The inverter max capacity is 72 watts @ 24v which would be 3 amps. Stated 90% efficiency would equal a draw of 3.33 amps where .33a is being lost in the converter. Using an online 12v battery sizing calculator with a 3.33 amperage draw for 8 hours on an AGM type battery to 50% discharge (they called it a safe discharge) resulted a 58AH@20HR battery.
1426644
I used it with a cpap for a camping trip. One night was no problem at all. I brought in the car for a couple of hours to charge it for nights 2 and 3... it was reading low power but it held. Don't forget to fully charge it every couple of months when not in use.
105863
If your CPAP can work with 12V DC power, yes, the battery will work for you. Actully, we do have some customers bought this battery for CPAP machine. Here is one of our customers review: ------------------------ Keeps my CPAP running about 11 hours (without using the heated humidifier). It recharges rapidly by 12 Volt DC car adapter or 110 Volt AC. I believe it might be the best-priced option out there right now for CPAP users. It is low enough in watt hours for lithium ion batteries to legally take on a plane (DOT rules) but I have not tried to do so yet. --------------------------------------------------- We are sorry that we do not know what kind connector your CPAP machine needs. This battery comes with more than 16 interchangeable connector tip. Most likely, one of them will work for you. Best regards. BiXNet
198298
Yes, but be aware of another potential problem. You are not supposed to use the humidifier while on battery power, to conserve energy. When, on a vacation in Turkey, I tried to use the system, I couldn't figure out how to attach the breathing tube directly to the CPAP unit. This was on a boat that lacked electric power. Turns out my tube was "electrified" in some way, and was not compatible with the battery system. Now I have an non-electrified tube. I have not had occasion to use the battery with the new tube yet, but I trust it will work. Moral of the story: test your equipment thoroughly before you go to Turkey.
2193794
I believe it all depends on the draw of you CPAP as this battery is only 7 amp - so 7 hours of use at 1amp and you should run out of juice. I bought mine for my fishfinder, but take a look at the link below as it is what I found on Electrical draw from A CPAP and it appears as if it draws more than people think versus how many functions you have it doing off of the battery.http://www.apneaboard.com/forums/Thread-Equipment-How-many-DC-Amps-does-my-CPAP-REALLY-draw
1409564
Hello, A C-pap machine is used to help you breath while you sleep. To operate it remotely, as in overnight camping or similar activity, you would want to figure out an average 8 hour night's sleep power requirement for the C-pap machine. In this example, IF your C-papa machine operates at 100 watts, the EL2601 inverter would be more than ample. The battery that you would want to have already, fully charged, would be a large deep cycle battery. Double check the exact power requirements from the manufacturer's contact section of their business.
78239
Yes, just plug it into the generator. Alternately, plug the cpap into the generator. Personally, I'm not thrilled with this battery pack and for car camping am considering a Goal Zero Yeti 400, perhaps combined with a Renology flexible solar panel.
235978
I run it on 2000mAH LiPOs (careful, there is no LiPo low-voltage cut off circuitry) and I get a solid 20 minutes. The original 1600mAH NiMH Duratrax battery I bought with it was closer to about 15 minutes.Yes, 2 batteries is a must.
2155334
The spec sheet doesn't say that number outright. However, if you use a 5v useable voltage cutoff (which they do in the data sheet), the battery will go 310 Hours at 2ma (620mAh), and at 10ma it will go 60h (600mAh). So there ya go. However, if you're using a 9V, your circuit probably needs at least 7V to run, so keep that in mind while choosing capacity.
282033
Ideally would be 24 watts, without considering conversion losses etc. Being a switching supply, it should be close to the that (basic formula is P=I*E, P is power, I is current, E is volts).
1306599
The inverter is a 3500 W. 4 1500 W equals 6000 w. That would mean you would need 2. I use this inverter on my boat. It runs a household refrigerator of approximately 1800 W. The best thing about this inverter is that it will shut down if it is back fed. Since I switch from AC to DC this feature is extremely valuable. I would recommend this inverter because I have tried Xanax and I burnt out 4 them. As far as the amount of battery you need it all depends on how long you going to run the unit.
61629
If your CPAP machine runs on 12 volts this battery would be great. I would get the Shorai charger. The Shorai charger is much more in tune with the Shorai technology. I am using these batteries in a high compression dirt bike and a big v-twin cruiser, they work great. I don't need a float charger any more each bike starts up fine after months in the garage.
1157948
Most likely not the draw of a cpap would well exceed the 10 amp hour battery's life. I would recommend looking into a Honda or other similar inverter generator. They are very quiet, very fuel efficient and light weight.
1409563
ResMed sells a 12 volt adapter for about $80On the rating plate it says 13 amps at 12 volts. I tested my ResMed S9 on AC using a Kill-a-Wattz device. With the humidifer set to 3.0 and taking deep breaths, it never went above 15 watts. So I would guess the DC adapter pulls about 1 amp, so it is usable with a normal 12 volt connector. And a deep cycle battery, of course. A car battery will be destroyed by this kind of low load.
650237
I would estimate that the battery would run the pump for 1.5 - 2 hours on a full charge. With my set up, I use a gas generator as back-up power. The 1 hour window gives me time to get the generator up an running.
478377
power draw is 4 amps @ 12 volts. So if you have an 80 amp-hr battery you'll get 20 hours.
170133
Yes. I can go 3 nights using my CPAP with a DC cord so I don't need the AC inverter option. You can still get a full night on the inverter if you don't have the DC Adapter. As with all CPAP its recommend to not used the humidifier option when on battery power. So I own two of these to handle week long camps.