> need a super long heavy duty extension cord to power my fridge
Why on earth would you need a heavy duty extension cord for something which pulls so little power?
I otherwise agree with the sentiment, however, it is way more convenient to set up your panel so you can backfeed it to power the whole house (or a nice chunk of it, at least). My Lightning will power all the important bits of my house for the better part of a week, all from the plug in the bed of the truck.