Comes back on by itself?
How long do you have to wait?
Are you under a load, like both air conditioners and then turn on the microwave?
When you have a good load going for 20-30 minutes, feel if your plug going into the shore power is hot. Also feel the plate/cover around the plug and circuit breakers to see if they are hot. "Hot" being too hot to hold with your fingertips for more than about 1-2 seconds. If you can touch it for 10-15 seconds before really wanting to take your hand off they may not be bad, depending on how big a load you have going and the outside temp.