My understanding is that only EV cars get the lower nighttime charging rate, not motorcycles. Keep in mind that the EV rate plan was likely formulated by PG&E after being squeezed by the Governor and the legislators to give EV cars a break and then they got their friends on the CA PUC to approve it. No politician gives a rats behind what happens with motorcycles, which is why we pay the same tolls as cars and two-axle trucks to cross bridges outside of car pool hours.
Your understanding is NOT correct. I get a cheaper rate when I run a clothes drier or an air conditioner or anything else before 1500 hrs. It makes no difference what it is, but includes EVs. There are a couple of different EV plans and they are NOT the same.
But one thing PG&E requires for any of their plans is for you to own an EV and it must have a CA plate and be on their list of EV models. I do not recall if Zero is on that list. I would look for you, but since I already have it, the website does weird things when I try to look, as I need to put in the same old info to look.
You will need your PG&E account number, the VIN number of any EV you own with a CA plate and your zip code and other such info. It will ask you what type of EV you have and IIRC, you must select from their list. IIRC, Zero is on it in CA, but NOT in NV. And that is why I never got the plan in NV. My Tesla and Energica have CA plates. I have two Zeros, one with CA & the other with a NV plate. I am sure I had the problem in NV, not CA, as Zero was NOT on their list then. Perhaps it is now. But at the full rate of 11.7 cents per KWH in Reno, I figure I will just forget the entire thing and not have any concern about what time it is.
But CA juice is very expensive, as you know.
So start the on-line application and see what happens. You could save a bundle, but only between 0000 and 1500 hrs, seven days a week.
-Don- Auburn, CA