Ukukhetha unikezelo lwamandla olufanelekileyo lwe-UPS kufuneka kuqala lumisele amanqaku amathathu:

1. Sesiphi isixhobo ekufuneka usisebenzise? Ingaba ikhona injini kwisixhobo?
2. Athini amandla esixhobo sakho? Yintoni amandla ombane afunekayo kwigalelo le-V?
3. Kufuneka ucime ixesha elingakanani ukuze wenze i-backup?

Emva kokuqinisekisa la manqaku mathathu, unokujonga izihlalo ngokwemixholo yamanqaku amathathu.
1. Ukuba izixhobo ziikhompyuter eziqhelekileyo, iiseva kunye nezinye izixhobo, khetha amandla ombane we-UPS ngokwezihlandlo ezili-1.5 amandla ewonke ezi zixhobo zomthwalo.
Ukuba kukho imithwalo ye-inductive efana ne-motor, i-compressors, iimpompo zamanzi, i-air conditioners, izixhobo zombane, njl.
2. Ubungakanani bamandla esixhobo sisiseko sakho sokuqikelela amandla ombane we-UPS. Khetha unikezelo lwamandla lwe-UPS ngokobuninzi obukhankanywe kwindawo yokuqala.
Yenzelwe umbane ofunekayo, oko kukuthi igalelo lombane wesixhobo sakho somthwalo, ngokuqinisekileyo kuya kubakho i-220VAC 380VAC 110VAC (incinci kwilizwe laseTshayina).
3. Ubude bexesha lokumka kombane elifunekayo limisela ukuba umbane wakho we-UPS ukhetha umatshini oqhelekileyo (imodeli yebhetri eyakhelweyo) okanye imodeli yebhetri yangaphandle (umatshini wexesha elide).

Ukuba awufuni ixesha elide lokugcina ukucima kombane, okoko nje ukukhuselwa kombane kuyimizuzu embalwa kwaye kukho ixesha elaneleyo lokuvala, emva koko ukhethe umatshini oqhelekileyo,
Ukuba ufuna ixesha elide lokulondoloza, ngoko ukhethe umatshini osebenza ixesha elide ukuze udibanise nebhetri enkulu ye-UPS yonikezelo lwamandla. Ubalo oluthile lunokusekelwe kule fomula [(umthamo webhetri * umbane webhetri * inani leebhetri) / amandla omthwalo] * amandla ombane = umthwalo Ubude bexesha ziiyure.