My 2010 Flagstaff came with a Magic Chef Model MCD990ARB microwave rated at 900 watts.
However, that is the OUTPUT not the input power. I have to tell you that the microwave really ramps up my Yamaha EF3000 and has kicked it off line when we forget to go out and take it out of Economy prior to using the microwave. When we have the air conditioner on, the Yamaha MUST be in normal and handles BOTH the 15K AC and the microwave with no problem.
I am thinking the 1000 will not be able to handle much more than the TV/radio and charge your batteries.
Having said that, when my DW plugs in her hair curler and the AC compressor kicks on, it will trip the Yamaha off line.
Must be one of those 30 Horse Power curlers.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW