40-50mph on the flat is where pretty much all cars are tuned to be their most efficient - sounds like you lucked out with that commute!Hi Andy,
Mine was 1 mile downhill, plus 7 miles on the flat. I was only doing 30mph downhill, but 40mph on the flat for 4 miles. I'm thinking the downhill benefit was mostly erased by the 7 vs 1 miles and the couple of times I floored it. I guess I'll see once I get my ECO parking permit and start using the car for commuting, where it will all be driving on mostly flat roads.
On a hilly single track road that I use (11 miles), I find that 36 mph is about the optimium speed to benefit from regenerative braking. I've often found that I end up with more at the finish than I had at the start.
I had an absolutely hilarous time in the Peak District last week with my leaf The GOM didn't have a clue and the SOC didn't know what had hit it It was quite fun working out which bits of my route cost me energy and which would see me arrive with 1-2% more SOC than I started withFor my 24kWh Leaf, I find that hill climbs borrow about 2-3% SOC for every 100m of climb, but give it back on the subsequent descent. Drives the GOM nuts.