All things considered, I probably work on the bike 10 minutes for every hour that I ride it. So perhaps 160 hours in 11,280 miles I generally ride 18-20 mph but that is not what the average comes out to.It felt like that amount but must have been 60-70hours ? Mine is also a class 3 so it covers the distance a lot faster than a class one, as I often go for road rides @25-27mph.
At 25 to 27mph my bike would likely use 25-30 watt hours per mile. Too much wind and noise.