Ukukhetha ukunikezwa kwamandla kwe-UPS okufanele kuqala kufanele kunqume amaphuzu amathathu:

1. Yiziphi izinto zokusebenza okudingeka uzisebenzise? Ingabe ikhona injini emshinini?
2. Ayini amandla emishini yakho? Ingakanani i-voltage edingekayo yokufaka i-V?
3. Udinga ukucisha isikhathi esingakanani ukuze wenze ikhophi yasenqolobaneni?

Ngemva kokuqinisekisa la maphuzu amathathu, ungabheka izihlalo ngokusho kokuqukethwe amaphuzu amathathu.
1. Uma okokusebenza kungamakhompuyutha avamile nje, amaseva nezinye izinto zokusebenza, bese ukhetha amandla okunikezwa kwamandla e-UPS ngokuphindwe izikhathi ezingu-1.5 amandla aphelele ale mishini yokulayisha.
Uma kukhona imithwalo ye-inductive efana namamotho, ama-compressor, amaphampu amanzi, ama-air conditioner, imishini yamandla, njll., amandla okunikezwa kwamandla e-UPS angaphazamiseki akhethwa ngokuphindwe izikhathi ezi-5 amandla aphelele ale mishini yokulayisha.
2. Ubukhulu bamandla wezinto zokusebenza yisisekelo sakho sokulinganisa amandla okunikezwa kwamandla kwe-UPS. Khetha ukunikezwa kwamandla kwe-UPS ngokuya ngokuphindaphindiwe okukhulunywe ngakho endaweni yokuqala.
Idizayinelwe ku-voltage edingekayo, okuyi-voltage yokufaka yemishini yakho yokulayisha, nakanjani izoba ngu-220VAC 380VAC 110VAC (incane ezweni laseChina).
3. Ubude besikhathi sokucisha kukagesi obudingekayo bunquma ukuthi amandla akho e-UPS akhetha umshini ojwayelekile (imodeli yebhethri eyakhelwe ngaphakathi) noma imodeli yebhethri yangaphandle (umshini wesikhathi eside).

Uma ungadingi isikhathi eside sokulondoloza ukuze kucishwe ugesi, inqobo nje uma ukuvikela ukuphela kukagesi kuyimizuzu embalwa futhi kunesikhathi esanele sokuvala, bese ukhetha umshini ojwayelekile,
Uma udinga isikhathi eside sokulondoloza, bese ukhetha umshini osebenza isikhathi eside ukuze uxhumane nebhethri elikhulu le-UPS lamandla. Isibalo esithile singase sisekelwe kule fomula [(umthamo webhethri * voltage yebhethri * inombolo yamabhethri) / amandla okulayisha] * isici samandla = umthwalo Ubude besikhathi amahora.