It depends on their current requirement, most electric kettles are between 1800-2200W, dishwasher water heating cycle is 2200-2500W, and electric irons on average range from 1400-2000W. So most will trip the inverter alone due to battery limitations.
So I tried a different kettle and it didn't trip the inverter (Phillips -1800w). Our kettle is SMEG and it's rated 2200 - 2600w. Having said that, my base load is very low, something like 200w, so I find it strange that it trips the inverter. I haven't tried the dishwasher, cause that plug is not running through the inverter, so it's off during LS.
