We have one of these, and if the power goes out it's got enough power to run e.g. the fridge/freezer so your food doesn't go bad. It can't handle even momentary

We have one of these, and if the power goes out it's got enough power to run e.g. the fridge/freezer so your food doesn't go bad. It can't handle even momentary overloads, so it's not good for powering motors, but I've run our fridge on a UPS powered by the inverter and that works fine.