Ngwaahịa a bụ sistemu nchekwa ike na-adịghị grid azụmahịa.Emebere ya iji dozie nsogbu oriri ike nke nnukwu ngwa ngwa na-ebu ibu n'ụlọ ma ọ bụ ụlọ ọrụ nwere oke ike, dị ka ikuku ikuku, igwe ọkụ eletrik, friji, osi nri induction, osi ite osikapa, kettle, kọmputa desktọpụ, ndị na-ebi akwụkwọ na ndị na-anya ụgbọ ala.