My math says the Firman can’t run my 5 ton AC unit as well as the bottom floor of my house. I invested in a window unit for our bedroom if I need defilade.I've installed a Micro-air Easy Start on the A/C and it reduced starting amps from 79 to 37 according to the amp clamp the A/C guy was using. Water heater, dryer, stove/oven and furnace are all NG, so the A/C is by far the biggest current draw followed by microwave, coffee maker, toaster oven, fridge, freezer.
That Firman might be able to run all that, I just don't know how to calculate all those watts.