Hi,
The wire to the cigarette lighter is probably not very beefy. If it is #10 then it can carry enough to do about 300 watts demand from the inverter. If it is #14 or #16 the inverter will be starving and will squeal at you.
Since you have the "power dome" get a dual cigarette lighter adapter. Plug one of the outlets into the inverter, and use the other with a "male to male" cigarette lighter cord to the 12 volt outlet in the RV.
There are other solutions as well.
Rmack1 wrote:
Would this make any difference? could I get away with plugging the inverter in by the TV? I only want to be able to watch a couple hours of TV at night.
I could also plug one of my four necessary components for watching TV into my 'Power Dome' emergency power supply with the inverter turned on. This should increase the time I could run off of my two 12 volt trailer batteries.