What is the difference between "A" & "B" We have a community at mynissanleaf.com very interested in EVR-Green EVSE, instead of the one Nissan has teamed up with. This is mainly because the installation charges are seen as too high esp. for simple insta... Can I wire two PR180's together? Can a PR180 be used in a 3 way with another PR180? Does Leviton offer a timer that corrects for Daylight Savings? Which power pack should be used with the OSC10-M0W?