Inkqubo yokugcina amandla e-28kWh (ESS) imele inkqubela phambili ebalulekileyo kwicandelo letekhnoloji yokugcina amandla, uyilelwe ikakhulu ukuphucula ukusebenza kunye nokuthembeka kweenkqubo zokunikezelwa kwamandla. Ngokubonelela ngomthamo omkhulu wokugcina, le nkqubo yenza abasebenzisi bakwazi ukugcina amandla egqithisileyo avela kwimithombo ehlaziyekayo, njengeepaneli zelanga, ukuze zisetyenziswe kamva. Esi sakhono sibalulekile f