Me like. Like its predecessor using a low power Dewalt cordless
> drill,
> this one rocks. Now that Dewalt makes 9 amp hour batteries we are
> talking some serious distance. I think it's better than a hub moter
> with
> its conglomerate of peripherals. Throttle control is a cheep Revo
> shifter with the latching mechanism removed. Simple as pie. It
> requires
> a freewheeling pedal hub (like on drift trikes) and a method for
> attaching the drill to the freewheeling pedal hub axle.
>
>formatting link
> That one is unfinished, but gives the general idea.
> (let me know if you have trouble viewing, will provide pictures
> apart
> from Flickr)
>
> My 5 amp hour batteries are plenty for now. A round trip to the
> local
> megastore easily on one battery (no spares). I just got caught in a
> rainstorm coming back from buying some groceries. Put a grocery bag
> over
> the drill and its battery, tied tightly, and rode through the
> downpour.
When I worked for Segway I experimented with how they fit into lifestyles. They might be fine for urban apartment dwellers in ice-free climates but anything less than a car doesn't work if you have a house in the suburbs. For me the minimum is a smaller SUV with a roof rack to carry lumber and roofing panels. I just brought home a compact refrigerator in it. Bicycles and motorcycles are nearly useless in northern winters.
I attended an electric vehicle show that a local college hosted and test-drove the BMW i3, which is a blast to drive though impractical for my use, with its EPA-rule-limited tiny gas tank. They can travel 3 to 4 miles per KWH which brings them into the range of practicability to recharge with a rooftop solar array.
I already recharge most of my batteries (except NiCad/Nimh) with solar power and home made charge controllers. Lead-acids are easy. Lithium isn't too difficult but you need to know and strictly observe the voltage and current limitations of the batteries you have. When NiCads are too dead for their dedicated charger they can be partially charged and restored to service.
If you can't design circuits this does the job, though it may hop below the maximum power point and draw Isc short-circuit current at low voltage from the panel. A linear regulator is more stable.
-jsw