As far as Excel 2013 version is concerned, the add-in is built-in already. But it is not enabled. Here’s how you enable Power Pivot before you use it for the first time.
- Go to File > Options > Add-Ins.
- In the Manage box, click COM Add-ins> Go.
- Check the Microsoft Office Power Pivot in Microsoft Excel 2013 box, and then click OK.
- You got your PowerPivot in Excel