I-DC UPS yokulayisha ngokushesha yonikezwe ukuthi ibe yimaliphi idlaya ngokubuyisa amandla e-battery ngokushesha emva kokulayiswa. Le ngxenye esenza ngempela ikhona lokusebenza kahle kunezindlela ezidinga ukusebenza ngqo, njengokuba kube nezinhloso zokupima, izinhloso zokuxhumana, nezinhloso zokuhlinzeka kwemifanekiso. Ngekunikezwa i-circuits yokulayisha ezininzi, iyasebenzisa itekitheni yokuguquguquya amandla okuphepha ukunciphisa isikhathi sokulayisha ngokukhulu kunamanye amamodeli. Isisitemu iyathatha iqendu lokulayisha ngokwesimo se-battery, uyinikeze ukuthi sibe kahle ngokushesha noma singapheli ubude besikhashana. Nakungaba usebenza ngokuphazinywa okuncane amandla noma kukhona iphroblemi enkulu yesikhwama, le DC UPS iyagcina ukuthi izinhloso ezihlotshanisiwe zibe nezimandla, noma kube khona ukuthi kuzobe kuvulelwe futhi ngokushesha. Ikhankanyo elincane likuvumela ukuthi kuhlukaniswe kahle kuvezwa ngaphakathi, ake nezinhlelo zokuphepha ezinezindleko zokulayisha ngokushesha. Kwezinkampani nezindawo ezidinga amandla wesilinda siyagcina, lokhu kugcinelwa kunezinto eziningi nezokuthembekela, ukuze ukusebenza kube nezimpawu ezincane kakhulu. Ukuze ufunde kangcono mayelana nezikhathi zokulayisha futhi ukuthi kufanayo nezinhloso zakho, ukuxhumana ngqo kuzovuma ukuthi uzobekwa kahle.