Hi GdB, whereabouts are you located? You might update your profile so it shows up by your name:http://myimiev.com/forum/viewtopic.php?f=13&t=3196
You mentioned SCE which I believe stands for Southern California Edison.
Your post title is confusing to me, because Optimum TOU times are NOT necessarily Optimum GHG times. You referenced GHG vs. time-of-day, which also varies with season and would have to be factored into your calculation. Nice to see elements of the Duck Curve in the graph.
In your first sentence I believe the point that you are making is that you are attempting to minimize your GHG footprint, irrespective of cost. Have you quantified this cost 'contribution' that you are making?
To complete the picture, perhaps you could summarize your rate structures for the two alternatives you presented? I found it impossible to synthesize the mass of information regarding tariff options on SCE's website.
Incidentally, your rate structure is considerably lower than my PG&E E-6 tariff (which has increased dramatically in the last two years). Bottom line, my Peak rate in the Summer at over 100% of Baseline is $0.43566/kWh
The ridiculousness of this is that I achieve the "100% over Baseline" number by generation
and not consumption
, but the utility doesn't care and uses that rate over the entire monthly billing cycle irrespective of whether I'm generating or consuming. Despite all that, I still haven't paid for any of the electricity I consumed in the last eleven years (the reconciliation "True-Up" occurs once a year), although the (expletive) utility has upped the monthly meter 'rental' rates. My expanded (to 11kW) home Solar installation is now fully amortized (after including EVs into the amortization calculation). Also, within the last year our community has signed up for obtaining ALL our power from carbon-free sources and with all my conserving efforts I might actually be eligible for a payment as a 'net power generator' at the next annual reconciliation if our mild winter continues (I have an all-electric house). Helps to not be driving the Tesla locally, as the i-MiEVs sip instead of slurping.