Ka whakaratohia e Yokey ngā otinga hiri mō ngā tono pūtau wahie PEMFC me DMFC katoa: mō te pūnaha taraiwa motuka, te wae hiko āwhina rānei, te tono wera me te hiko tūmau, te tono hiko whakakotahi rānei, ngā puranga mō ngā hononga kore-pūnaha/pūnaha, me te wā whakangahau. Hei kamupene hiri matua o te ao, ka tukuna e mātou he otinga hangarau tino pai me te utu tika mō ō raruraru hiri.
Ko tā mātou takoha motuhake ki te umanga pūtau wahie he whakarato i tētahi hoahoa pai rawa atu me ā mātou rauemi e tika ana mō te pūtau wahie e hangaia ana e mātou mō ngā wāhanga whanaketanga katoa mai i te rahinga tauira iti ki te rahinga whakaputa nui. Ka tutuki a Yokey i ēnei wero me ngā momo otinga hiri. Kei roto i tā mātou kohinga hiri whānui ngā gaskets wetewete (e tautokona ana, e kore rānei e tautokona) me ngā hoahoa whakauru ki runga i ngā pereti bipolar whakarewa, graphite rānei me ngā taonga ngohengohe pēnei i te GDL, MEA me te rauemi anga MEA.
Ko ngā mahi hiri matua he ārai i te turuturu o te wai whakamatao me ngā hau tauhohenga, me te whakaea i ngā ātete hangahanga me ngā kaha raina iti rawa. Ko ētahi atu āhuatanga nui o te hua ko te ngāwari o te whakahaere, te pakari o te huihuinga, me te roa.
