We have E-7 (similar to E-6) for solar (since 2004). I considered a second meter for E-9, but decided it was too expensive to install. What I now realize is that winter months with the Leaf are actually the most painful in terms of electricity costs, because we are well above 130% of baseline (3rd tier) with the car from Nov through March. So we are basically paying 26 cents per kWh for all the Leaf charging. Our solar system is 3.3kW, and we used to just about break even each year (typically under $100 for the year). I figure this year with the Leaf, we'll be around $600 or maybe more. We're on track to drive about 10,000 mi/yr on the Leaf. I am considering getting more solar panels.
2011 SL-e, silver, VIN 8198, delivered 11 Sep 2011. 37k miles, ~200 GIDs, 9 bars (1st bar lost 3 April 2014 @20,700 mi, 3rd bar lost Aug 2017)
2015 e-Golf SEL
2013 Fit EV, VIN 151, delivered 17 Nov 2012, lease return Nov 2015 at 30k miles
7.7kW solar PV