Adding additional outlets to inverter

bigcritter wrote:
Our CPAPs require an expensive 12 volt plug, according to the manufacturer, so the inverter is the best option.

Those "expensive" 12 volt plugs for CPAPs can often be found on the internet very reasonably priced. It is where I found my $75 plug for $15 brand new. And your CPAP will be much happier on 12 vdc, if it is designed to run that way. Let us know what kind you have, and I bet dollars to donuts someone will know where you can get the 12 vdc cord!