You would have to connect a 2000 watt inverter directly to a 100 amp/hour deep-cycle battery that is in turn connected to your vehicles alternator. You would have to run the engine at fast idle anytime the 36 cup coffee pot was in use…
Not worth the effort…Coffee percolators are pretty much history…Today, it’s hot water and instant coffee…Or a Mr.Coffee type machine which have a 12 cup size limit…