ver os ▁were ▁converted ▁to ▁dies el - elect ric ▁hy brid ▁prop ulsion ▁by ▁Stewart ▁& ▁Stevens on ▁for ▁the ▁Ro aring ▁F ork ▁Transport ation ▁Author ity ▁and ▁delivered ▁in ▁November ▁ 2 0 0 5 ; ▁New ▁Fly er ▁was ▁unw illing ▁to ▁perform ▁the ▁engineering ▁required ▁to ▁integrate ▁the ▁hy brid ▁driv et rain ▁( man ufact ured ▁by ▁G M ▁All ison ) ▁for ▁the ▁small ▁order . ▁The ▁cost ▁of ▁each ▁hy brid ▁bus ▁was ▁, ▁compared ▁to ▁ ▁for ▁the ▁conventional ▁D 4 0 i . ▁ ▁F uel ▁cell ▁A ▁hydro gen ▁fuel ▁cell ▁In ver o ▁was ▁demonstrated ▁in ▁W inn ip eg ▁during ▁the ▁summer ▁of ▁ 2 0 0 6 . ▁The ▁fuel ▁cell ▁In ver o ▁was ▁integrated ▁by ▁H ydro gen ics ▁using ▁their ▁Hy PM ▁ 6 5 ▁fuel ▁cell ▁power ▁modules ; ▁in - w heel ▁electric ▁mot ors ▁from ▁S iem ens , ▁installed ▁by ▁I SE ▁In cor por ated ; ▁ult ra - cap ac itors ▁from ▁Max well ▁Techn ologies ; ▁and ▁roof - mount ed ▁hydro gen ▁storage ▁t anks ▁from ▁D yn et ek ▁Indust ries ▁of ▁Cal g ary . ▁The ▁system ▁had ▁a ▁continuous ▁r ated ▁output ▁of ▁ ▁with ▁a ▁peak ▁output ▁of ▁ ▁and ▁a ▁range ▁of ▁approximately ▁ 6 ▁to ▁ 8 ▁hours . ▁Ref uel ing ▁for ▁the ▁demonstr ation ▁was ▁performed ▁at ▁Red ▁River ▁College . ▁Development ▁of ▁the ▁fuel ▁cell ▁In ver o ▁had