A:AnswerI don't know what the specifications are on this unit but every modern mini fridge in this size range I've seen uses 100 watts or less when running. If you want to use a power inverter or generator, I would use use at a bare minimum a 300 watt unit (more is better) as the motors typically require 3-4 times the running wattage briefly to get the motor moving.
A:AnswerI had a similar one (different manufacture but a stainless steel with glass to like this one). I kept mine outside under a porch for 17 years with no problem. You should do ok with it. If iI purchase this one I will be using it outside. This year mine quit cooling - pretty good service I think.