Ngwaahịa a bụ sistemu nchekwa nchekwa ike na-anọghị n'ụlọ.Igwe ọkụ ọkụ na-enweghị nkwụsịtụ nke UPS nke na-ekesa ọkụ ọkụ na-ekesa ihe nchekwa nchekwa nwere ọgụgụ isi nwere ike inye ọkụ eletrik maka ngwa ụlọ dị iche iche dị ka ọkụ, TV, ọkụ eletrik, friji, 1HP air conditioner, kọmputa, rawụta, wdg.