I would like to be able to import Excel Spreadsheet equipment schedules.
I can agree with that, but it's always better to answer the "why?" by expanding a little bit of the problems you're having. I think that Revit has powerful scheduling abilities, mostly since it's "live" and can interact with the model database. Are there any specific limitations to Revit's scheduling that are requiring you to use Excel spreadsheets instead?
I agree with CADastrophe. It should be the reverse, Revit TO Excel. You can set up schedules to be coverted to Excel following a few steps (exporting to text then importing text to excel), but Panel Schedules are unable to be exported. Any panel schedule I create needs to be exported to create a template to be placed inside the panel itself.