Here is my newest creation I lovingly call "The Drunken Mosquito"
2 x 100w panels - $138
24v MPPT charge controller - $28
24v 20ah LiPo battery - $112
24V geared motor kit - $80
2 bicycles chopped up and smashed together (no weld) in cruzbike fashion - $108
PVC pipe with glue, tape and...