Off-grid LB capacity

[Big Zak]

Morning all, I am a total novice at this lark and far from an electrical wizard. I suffer from sleep apeona and have to use a CPAP machine at nights. When on a site with hook up its perfect.
Would the leisure battery last all night running a 240v appliance ? if I was off grid?
If not I have been looking at silent generator,s, has anyone used one ? Are they worth the financial layout ?
would they work ?
Cheers
Zak

 

[Spaghetti]

I guess it depends on the capacity of your leisure batteries, the wattage of the appliance and the efficiency and size of your inverter.

if you have more details, someone with a stronger background in electronics could advise.

 

[Dellmassive]

looking at this Philips Respironics DreamStation Auto CPAP Machine | EU-PAP

the specs say:

*****************************************************************

Electrical Ratings 100 – 240 VAC, 50/60 Hz, 2.0-1.0 A
Max Power Consumption No
Power Cord Included 3-Pin Figure 8 UK Fused
Power Supply Type External with Power Brick
Multi-Voltage Power Switching Automatic Switching
AC to DC Switch Automatic (if both connected)
DC Option 12V DC
DC Battery Comments
DC Power Consumption: 12 VDC, 6.67A.

To run from a DC source you will require Philips DC Cable #3 - found HERE.

This machine can be powered with either the Tracer Compact Battery or the Tracer Ultra Battery using the above cable.

*******************************************************


so 2amps via 240vac, or 6.7A via 12vdc.


so you can either use 12vdc or run it via an inverter.


7ah(12v power draw) * 8hours(sleep time) is 56ah per night . . . . so at 50%DOD you would need a 100AH battery per night. (then recharge for next night)


so yes . . . . its possible.

but need the specs of your machine to get more details.

 

[Spaghetti]

Ah, it’d be more efficient running directly off 12v, with no inverter losses.