Originally Posted by
Squeezebox
Cost too much. Not enough electricity. Very seldom are you more than a day away from an electric outlet. And if you are, you probably don't have phone service and really don't need electricity. My external battery covers my needs with a once or twice a week charge. I don't need a dyno for night riding. I don't do that often enough. There's better places on the bicycle or the tour to spend the money on.
If you stay away from the fancy hubs and accept a weight penalty, a dyno hub can be bought for 30-40 dollars. If you can build a wheel on your own, the complete setup doesn't cost much at all. It' gets even cheaper if you can DIY a USB adapter too.
I spent a a little bit over a week in the Norwegian Finnskogene last summer. I can promise you that there is no available power outlet in those woods! My solar panel became a blessing for keeping my battery bank topped up and I sorely missed a dyno hub on the overcast days.