"Izinto zesibili zidlala indima ebalulekile ekuvuselelekeniI-Energy Systems Guide, Ukuqinisekisa ukuhanjiswa kwamandla okusebenzayo nokwethembekile.

"Izinto zesibili zidlala indima ebalulekile ezinhlelweni zamandla avuselelekayo, ezinika amandla ukudluliselwa okusebenzayo kanye nokuthuthukiswa kwamandla okusebenza kumandla wamandla, ukuthuthukisa izindleko zamandla. Njengoba kuthuthukisa izindleko zohlelo lonke. Njengesidingo sokusebenza kwamandla avuselelekayo

