We have the 1500W inverter, and love it. I can charge/work with my computer any time I want, and we use a temperature controlled kettle to get our coffee water to the correct temperature in the morning. The kettle does a good job of bringing the battery system to its knees--as I expect your toast oven will--but even in the coldest weather, the solar pretty much bounces immediately back. (We do turn off the heater when that happens, though.)
The combo of the inverter and the solar in our 19 has been a game changer for us on the road. In our old setup, we had panels that we set up, and a rather crappy inverter that was as flaky as it was weak (and really only got used to charge my camera batteries). We haven't had an issue with either in the two years we've been traveling with our Escape.
We did get the option to have the inverter serve all AC outlets in our trailer. It was a pretty small addition and we've definitely used that quite frequently. Otherwise, you'll need to run an extension from the inverter to the device you wish to drive. (I don't remember the cost, but it was reasonable.)
Rick