Quote Originally Posted by RickLight View Post
The 20A recommendation is a combination of CYA and the 80% rule for continuous use. 80% of 15 is 12 or 1440W very near the 1300W listed draw. Then there's 'inrush' that can briefly be many times the normal load.

So how much C for Y A?
I have had it on a couple of trips totalling 3 weeks in duration. It has performed perfectly with the 15 amp breaker. I still have the 20 and a 15 as well for spares. The Momentum takes the same breakers as my house, So having spares is a good thing. This kind of problem generally happens to me when the stores are closed.