Hard to pedal? Bike heavy? Oh oh...
Yah can pedal most any bike for warmth or exercise, but in "EV Terms" you MUST pedal from stops, help up hills, etc to shave off any/all peak power outs. To extend ranges per charge, but also to "baby" any cell chemistry, such that the cells ("battery") last longer before final recycling and replacement? ie to minimize costs per mile. Done "right", about the same costs per mile as any pedal-only bike, just with less poops per mile. And any "heavier" vehicle comsumes more energy to accelerate or go against gravity ("up" hills). Also, make yerself as aero - aerodynamic - as you can. The "faster" you go... air "wind resistance" increases... watt takes more energy... yer wind screen's there for a reason.
To go "further"... go "slower"...
ES changed my life (for the waaaaay better).
Eff. June, 2014 Phoenix Ebike Promotions
(Current ride? High speed lawn chair.)
Phoenix Ebike Promotions conversion kit (work in progress. More drink holders, etc etc)
Joined yer local chapter of EA yet?
(Ebikers Anonymous - Where we're all miserable failures, but the parties are hilarious...)