My coffee maker draws 850 watts 'peak' during the brew process. I use a 1000 watt (hard wired) inverter...and just run the coffee maker. My t.v. and analog to digital t.v. inverter runs together off a 300 watt cigarette lighter type power supply.
P.S.- Yes, I still use an old 19 inch analog box t.v. and digital converter...fits and mounts better in the t.v. shelf.