Ko te BAVP (Waihanga Apitihanga PV), he hangarau e whakauru ana i te punaha whakangao hiko o te ra ki runga i te tuanui o te whare o naianei. Ehara i te mea he kaupapa whakangao hiko photovoltaic engari ka taea hoki te tiaki i te hanganga whare taketake ki te tino nui. Nga Painga o te Roof BAPV: Kaore he take ki te whakarereke i te hanganga o te tuanui taketake. He waatea ki te whakauru me te kaha ki te kawe kawenga. He iti te utu haumi o etahi waahanga photovoltaic. He kaha ake te tiaki i te wera me te kaha whakamatao.
Ka eke ki te 80 mita te whanganga kotahi o tenei kaupapa takakau, koinei te whanganga nui rawa atu i roto i nga riipene rite i Haina. He whitiki-taarua me te paparanga-rua te anga matiti matiti.