[Al Skierkiewicz]

Barstow,
I would be remiss if I did not interject a word of caution. The picture you reference looks very cool but I must tell you and all teams that electrical codes in your area may not meet or exceed local codes in the areas where you compete. Although this particular cart does appear to make extensive use of conduit and metal electrical boxes, we do not know how it is wired, grounded or fused. The UL safety people at each event can give you further guidance but they also have the authority to ask that a particular homemade electrical device be removed from service for code violations. A UL approved, multiposition charger is a sure bet though, and one that many teams use.