Forum Discussion

djbroughton's avatar
djbroughton
Explorer
Feb 23, 2015

Trying to use small inverter through cig. lighter adapter

I am trying to run my CPAP machine from a light fixture above the bed instead of through the main inverter. I wired a 12 v cigarette lighter outlet into the fixture. The voltage reads 12.5 v and I can...
pianotuna's avatar
pianotuna
Nomad III
Feb 24, 2015
Hi,

There are DC to DC converters for 12 to 24 volts. That would be more efficient than a pure sine wave inverter going into a 120 volt to 24 volt power brick.

djbroughton wrote:
but my machine is a Resmed S9 (Australian manufacturer) and the 90 W adapter says DC output is 24 V. Regardless, for the 2 prong DC cord that goes into the adapter I would still need a matching 2 prong female connector. Where would that come from?

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,199 PostsLatest Activity: Feb 17, 2025