Farashin farko na bus-bus na jan karfe kusan sau 3 zuwa 4 na busbar aluminum (ƙididdigewa bisa matsakaicin farashin shekara a 2023), amma a cikin yanayin yanayin da ke buƙatar babban aiki, ƙarami ko rayuwar sabis mai tsayi, cikakken ƙimar rayuwarsu na iya zama ƙasa. Misali, a tsarin motar bus na cibiyar bayanai, ƙarancin juriyar sandunan tagulla na rage asarar wuta, kuma lissafin wutar lantarki da aka adana na tsawon lokaci mai tsawo{4}} na iya daidaita bambancin farashin farko.
Amfanin farashi na igiyoyi yana nunawa a cikin tsarin shigarwa. Halayen su masu sassaucin ra'ayi na iya rage amfani da masu haɗawa da kafaffen maɓalli. Koyaya, tasirin fata na manyan igiyoyi masu yawa{2} (a cikin mafi girma{3}} mitar yanayi) zai haifar da raguwa a ingantaccen ƙarfin ɗauka na yanzu{4}. Kayayyakin da aka haɗa (kamar jan ƙarfe{6}}ƙaƙƙarfan aluminium) suna haɓaka haɓakar wutar lantarki ta saman saman jan karfe da rage nauyi da farashi tare da ainihin aluminium na ciki. Koyaya, ana buƙatar matakai na musamman yayin haɗin walda ko tasha. Fa'idar farashin gabaɗaya ya dogara da takamaiman yanayin aikace-aikacen.