I get about 5 psi on my Sta-Rite 200# filter on low. That is with the same Dynamo 3/4 you have. I do have solar and that is with the solar bypassed. I don't know if the additional hose and hardware changes the pressure. I think I get 13 psi on high. I can't remember, I don't run it much on high.

I answered your wiring question in the other thread. Hope it helps.

Cheers!