How Many Watts Do I Need?


I've decided to go ahead and buy a food dehydrator. :) Now, the first thing I noticed when I started shopping for them online is that they are not all the same wattage. How many watts do I need? I noticed a 400 watt dehydrator, for example, that was only about $30. Would this be "good enough" for dehydrating bananas like I want to do?