If you only have 110VAC in your shop, you'll be limited to 1.5hp. I'd still get a 2hp VFD like the KBAC 27d, which will give you 1.5hp at 110VAC, but still give you room for upgrading down the road, if you get 220VAC ran in your shop. If you have 220VAC, you may also choose to go with the aforementioned 3hp setup, for just a little bit more ...