Invertor size for a refrigerator

Knowing what the locked rotor draw is where you should start. I made the mistake of matching an inverter to a fridge where the inverter should have handled the load but didn't. I replaced that inverter with a larger one and haven't had any issues since.
The Tripp Lite inverters that are built for motor startup have a good rep but prices are getting closer with the newer sine wave inverters. I am using a Xantrex Prowatt inverter and think it's a fairly well built device.