My personal wish list--four words:
Better batteries, more range.
Of course you'll have to charge for this, so the basic 10Ah hub
battery hub bike model could remain intact for those who have modest
range needs and are looking to keep cost down. Additional 10Ah modules
that can be wired parallel and mounted on a STURDY rear rack with a
pannier option for holding multiple aux packs (up to three--one on
top, one in each side pannier)
could be offered at a competitive per module price with a solid 3-year
warranty to match Opti's.
Some sort of idiotproof plug-and-play wiring system would be
important.
Battery pack weight would obviously be critical and needs to be kept
to a minimum. I've personally ridden with up to 60 pounds or more of
battery weight in the back (ugh--not recommended!) and think that
about half that weight or less is optimal, so 8-10 pounds per module
would be ideal. My experience with pannier packs in general has been
very positive from a bike handling standpoint, but I can't emphasize
enough how bulletproof and sturdy the rear rack needs to be--namely
made of high strength steel tubing (see any serious bike touring site;
the Tubus brand racks get consistently high ratings) and attached to
the bike in three points. (I personally favor a seatpost collar AND
rear frame triangle mounts combined--see Axiom Odysee.) Think high
speed vibration over washboard dirt roads and/or occasional pothole
action. Peruse virtually any e-bike user site and you'll inevitably
come upon the "lost my battery off the rack" posts, often with
disastrous consequences.
In the end you'd be offering your customers a modular-type battery
pack system with an ultimate capacity of 40Ah or so, plenty of power
for the vast majority of us and enough to (finally!) truly meet those
fantasy ultimate range numbers of 40-60 miles that so many e-bike
makers falsely claim.
You'd also be reducing the per pack amperage draw of each module for
longer pack life and minimal voltage sag, a performance booster.
LH
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