XL-21 mphamvu kugawa bokosi ndi chipangizo m'nyumba, oyenera zomera boma ndi mafakitale ndi migodi mabizinezi, AC pafupipafupi 50Hz, AC voteji 380V, atatu gawo atatu waya, atatu gawo anayi waya dongosolo mphamvu. Amagwiritsidwa ntchito pogawa mphamvu ndi kuyatsa ndikuwongolera, ndipo angagwiritsidwenso ntchito pazochitika zina zomwe zimakumana ndi ntchito yolemetsa ya bokosi logawa mphamvu, monga: zipinda zamakompyuta zamkati, mafakitale, magetsi akumidzi, mafakitale omanga.