I've been commuting electric 11 miles each way for over a year. In my time I've found limiting myself to 18-20mph pedal assisted is the best use of my battery and my body. I still get some workout but not enough to sweat through my clothes. The bike averages 400w consumption and I've gotten used to running bigger batteries than my commute needs. Currently I'm running Multistar Lipo's at 12s2p for 50v charged and 20ah max range. I consume 6-8ah daily.