We got a 2015 Agile last April and just completed an 11,000 mile trip across the US and back, starting in New Hampshire. We also have the Power Star unit; I printed the manual from an online link, after discovering that I, too, had the manual for the Trip-Lite inverter.
After running the roof exhaust fan and the fridge all night, I was able to turn on the inverter (without being plugged in to shore power), and make my coffee using a 120VAC 800-watt maker without any problems. I used the "ON" position, not the Power Saver mode.
PS: we did have some charging issues when we reached Washington State, namely that the extra alternator was overcharging (16-18V!) the coach batteries. It eventually fried them, and had we not had the solar panels the trip would have ended rather quickly. After that, we tried to plug in whenever we could.
Speaking of the solar panels, we also had a controller that didn't match the literature we had, so I found that manufacturer on line and printed up its manual as well. The "new" algorithm it uses really did seem to be an improvement over previous technology. We didn't need to have direct sunlight: the controller would indicate that the panels were already producing some energy when the sky had only lightened up in the morning.
On the way back home we drove up to Kitchener, ON to the RoadTrek factory to see if we could get things taken care of. Not only did they give us a car to use, but, with no hassles at all, replaced all four batteries, the additional ("under hood") alternator, its wiring harness, took care of numerous other little glitches, and had it ready for us by 3PM that day. Great people to deal with! Many thanks to Leo Haire and his crew.