I now have 275W worth of solar and the BlueSky 2000e controller. 1 Kyocera 135w and earlier this year I added a second 140W. I don't have a microwave, but that 275w was enough to keep the compressor fridge running all summer with the batteries (2 grp31) topped off before noon. I did replace all the lights with LEDs. Made the difference from something like 3 amps/bulb to 0.1 amp/bulb.
I'd recommend just adding 1 more panel before upgrading your controller and adding 2 panels. Of course, if you have the money and are looking for some place to use it...
Do your homework before adding a panel. They need to be similar regarding max voltages if in parallel or max current if in series. I suspect you'll want to run them in parallel.
EDIT PS: I don't have A/C either, but I hope you're not trying to run that off batteries/solar...
