3 days! Thats impressive. I've been busy on the Toy and surfing inverters at night.
I have had a Tripp lite and know they are a quality product, used to be used for battery backup at rail road crossing. If I was full timing I would consider something of that quality.
I looked at flocks of inverters and found that the Aims 1250 model has been around for some time and has good ratings. I found it is favored among commercial users such as ice cream trucks. It is not an Outback but not a junk one either and has some bells and whistles such as a thermo fan.
http://www.aimscorp.net/1250-watt-power-inverter-12-volt-with-features.html
It does not say if it can be mounted vertically, but I can see no reason it should not be?? I can buy this on Amazon for about $130, free shipping. But will await some input before I push the buy button.
Many thanks Jim