▁fully ▁en closed , ▁but ▁for ▁the ▁ 2 0 0 7 ▁season ▁this ▁was ▁b anned , ▁followed ▁by ▁the ▁wh oles ale ▁ban ▁on ▁wind s creens ▁the ▁next ▁year , ▁meaning ▁all ▁cars ▁after ▁this ▁point ▁have ▁been ▁fully ▁open - cock pit . ▁The ▁ 2 0 0 6 ▁season ▁was ▁also ▁the ▁last ▁to ▁feature ▁ 6 ▁hour ▁races . ▁In ▁ 2 0 1 1 , ▁the ▁batter ies ▁supplied ▁were ▁changed , ▁with ▁a ▁large ▁reduction ▁in ▁available ▁energy , ▁reducing ▁spe eds . ▁In ▁ 2 0 1 4 ▁the ▁final s ▁were ▁rest y led ▁as ▁the ▁' Green power ▁International ▁Final s ', ▁due ▁to ▁participation ▁from ▁teams ▁from ▁multiple ▁countries , ▁such ▁as ▁S iles ian ▁University ▁of ▁Technology . ▁In ▁December ▁ 2 0 1 4 , ▁it ▁was ▁announced ▁that ▁due ▁to ▁space ▁requirements , ▁the ▁ 2 0 1 5 ▁International ▁Final ▁was ▁to ▁be ▁held ▁at ▁Rock ingham . ▁Following ▁Rock ing h ams ▁closure ▁shortly ▁after ▁the ▁ 2 0 1 8 ▁final s ▁it ▁was ▁announced ▁that ▁the ▁ 2 0 1 9 ▁final ▁would ▁take ▁place ▁at ▁Silver stone ▁ ▁on ▁ 1 7 ▁October ▁in ▁order ▁to ▁mark ▁ 2 0 ▁years ▁to ▁the ▁day ▁since ▁the ▁first ▁Green power ▁event ▁in ▁ 1 9 9 9 . ▁ ▁Pat rons ▁and ▁Part ners ▁The ▁Pat rons ▁of ▁Green power ▁are : ▁The ▁Earl ▁of ▁March , ▁owner ▁of ▁Good wood ▁Motor ▁Circ uit