A:AnswerThe product information says that you can use any pan that a magnet will stick to. Sometimes a pan that would normally work will be coated with a material that interferes with the heating process so that it won't work, which is why you might want to test the pan with a magnet.
A:AnswerI've looked through the manual and haven't found a maximum capacity, sorry to say.
From experience, I can tell you that it can handle a fully-loaded 8-quart stockpot - but I wouldn't want to use it as a bathroom scale, or stack refrigerators on top of it.