Two of my sisters and one other acquaintance have now bought E-Bikes as a result of seeing mine. At least 3 others (one of which I haven't actually met) are thinking of getting one after hearing of mine. (
Source of their bikes)
I finally found out what caused one of my problems. The tail lights stopped working and the store couldn't figure it out to fix it. Not ideal for night driving but I do have reflectors (all the law requires) and near zero traffic to contend with on my night travels so I was not too concerned but a little annoyed. It turns out the manufacturer instead of putting the wiring to the rear end around the latch that holds the seat compartment closed put it over it and therefore into the latch mechanism itself, the tail light wire was cut right through, the other wires were damaged (the left turn signal was intermittently functional due to being shorted). I spliced in extension wire and routed around it and everything is now working.
I plan to stop by the store and explain the solution so at least they can check if any of their other bikes have the same wiring fault (and if so they can complain to the manufacturer). Other people then need not have the same issues I have had.
The bikes my sisters bought did teach me something to watch for when buying the bikes though. They are classed by the distributor as dual mode 350/500 watt. The law allows 500 watts
continuous. My bike is a 350 watt (continuous). At first I couldn't figure out why my youngest sister who is lighter than I couldn't match my acceleration without kicking up to 500 watt now I know why. The bikes they bought list the
peak power not continuous. Likely they are more like 250/350 continuous power. So in the higher mode her bike matches the power of mine and she is enough lighter that she can out accelerate me. It makes her bike less desirable though.
One other thing has bugged me and I think I have a solution. The batteries can't take being frozen. If we have another winter like last winter it would be possible to ride the bike all winter (suitably dressed of course) if only I had a way to power it without freezing the batteries. A portable generator and power inverter (110 v AC to 48 v DC) would be lighter than the actual battery and able to power it. I could either mount it in place of the "trunk" or make a little trailer.
I'm not sure if I'm actually going to try the "generator trick" but it would extend the machines range to be indefinite just as long as I carry fuel enough to get to a gas station to fill up. It would also be much lighter than the battery (70 lbs) so I would have better acceleration or be able to carry more.
Overall I'm happy with my E-Bike and it does what I need.