OK. Got it. Thanks everyone for the info and the lesson. 16 years of being on this forum and it never disappoints as to how many fellow RVers come to the assistance of others.
For those helping me out (and for what it's worth) I am going to delay installing the bigger inverter until next winter. I will travel through Quartzite, AZ when all of the merchants and installers are there in January and have them install an extra 2 Trojan 6 volt batteries, the inverter and the heavy duty wiring. Heading to Alaska in Spring/summer 2017 and the upgraded inverter/ battery system will likely be needed.
Thanks so much