I am currently have an 8.4kW PV system and am on a PG&E E-6 rate. Since I took delivery of my Model S, I've been considering switching to an E-9 rate to get the very low off-peak rates for charging (from midnight to 7AM). However, because they shift the peak hours later its not clear this is a win since some of my best generating time that is peak on E-6 becomes partial peak on E-9. Also some time after dark that is partial on E-6 is peak on E-9. Has anyone on this forum done an analysis of this. A quick calculation suggests that unless I do *a lot* of charging off peak, I'm better off on the E-6 rate. Also, E-6 is clearly preferable to the new EV rate that will ultimately replace E-9.