What's the difference between Module Wattage Range and Compatible Modules?

Module Wattage Range will allow you to enter a minimum and maximum wattage range. This means the optimizer will only be available when the module used on the proposal is in the specified range. For example, if the wattage range is between 350W and 450W, and a 300W panel is being used, the optimizer will not appear. 

Compatible Modules will allow you to select one or more modules from your company list to be compatible with the optimizer. This means that the optimizer will only populate when one of the specified modules is selected on the proposal.