SPL, joalo ka China hlalosoa unit khamphani ea seteishene, e khona ho fana ka liteishene tse theko e tlaase le tsa boleng bo holimo ho bareki ba rona ba lefats’e. Ntle le ho fana ka tse tšepahalang hlalosoa li-unit substations, re boetse re profeshenale khoebong ea machaba, re na le bokhoni ba ho rarolla bothata bofe kapa bofe tsoelopeleng ea ho rekisa kantle ho naha.