I've had a Leaf and solar for the last 2.5 years, and I have been happy on PG&E rate E-9A. But that rate is being retired at the end of the year, so I need to decide whether to switch to E-6 or EV-A. Unfortunately the PG&E online rate comparison tool does not work on my account, it says "the My Rates tool is not available for your rate". So has anyone done any analysis to figure out under which conditions one plan is better than the other? Details of my situation follow.
I have a 2.4 kW-AC system which according to Enphase generated 4.2 MWh during my last PG&E true-up period, June 2013 - May 2014. My net PG&E usage during that time period was 1.6 MWh, for a total usage of 5.8 MWh. The Leaf gets driven about 10,000 miles/year at maybe 3.9 miles/kWh, so I figure half of the usage is attributable to charging the Leaf at night. Under E-9A I end up with a net energy credit of about $45 at the latest true-up, but of course that was lost as I am still a net energy consumer.
To complicate matters a little, I am about to switch from a gas furnace and single window A/C to a 1-ton ducted mini-split heat pump for space heating and cooling. So my electric usage is going to go up, but under E-6 I should qualify for the higher electric heat baseline amounts: 8.3/14.9 summer/winter kWh/day versus my current 7.0/8.5 . EV-A is untiered, so baseline is immaterial for it.
Any guidance would be appreciated. My initial bias is to switch to E-6, as it is more similar to the E-9A I am used to. Ultimately I may have to estimate my increased HVAC electric usage and write a spreadsheet to get a good answer, but I am hoping to avoid having to do that. Or I may just switch to E-6 and revisit the issue in a year once I have some real data.