Replace microwave convection oven

Thanks for all the helpful info. My coach Sharp 750 watt convection/microwave has been in the shop twice for repairs,not going back for third visit. Works for 59 seconds and shuts down. After following your suggestions as to the power supply I found out it is powered through one 20 amp breaker from my 2000 watt inverter. My choice for replacing the unit is a Samsung Model MC17J8000CS on sale at Home Depot Reg $499. Now $388. Features Convection,Toaster,Broiler,Microwave & Slim Fry Technology. It draws 1700 watts. My math tells me that is 14.78 amps with a 20amp breaker at 80% give me 16 amps available. I am going with that unless anybody can show me where it won't work. Do not want to blow breakers or overheat wiring.
Thanks as usual you guys are the best.