Quote Originally Posted by PoolDoc View Post
You know Mr Parker, I'm not sure I can figure you out. Once minute, you sound knowledgeable to the point I'm thinking you are in the pool business, and the next you are talking about using a 3ph motor in a residential application!

Are you working commercial pools?

Regardless, discussions of roll-your-own VFD systems don't belong in the general discussions, so I'm moving this to the China Shop.
No I am not in the pool business but I was an engineer in the computer chip industry and was a Landscape contractor some 20 years ago plus did residential electrician work when I was in high school.
I am an engineer at heart and am always looking at how things are made and how can it be done better and cheaper.
I just have a residential pool and my electric meter was just upgraded so I can go onto PGE and see the electric use and their is a huge spike in usage when the pump turns on. I am just trying to decide what is the best way to lower the cost. Seems like their are two choices. VFD and 2 speed. Both are better then a single speed it seems.
Ok gotta get back to my project. At my moms house fixing her sprinklers.