Ikintu cyingenzi cyihishe cyerekana POE ni imbaraga zose zitangwa na POE.Munsi ya IEEE802.3af, niba amashanyarazi yose ya POE yumurongo wicyambu 24 POE wageze kuri 370W, noneho irashobora gutanga ibyambu 24 (370 / 15.4 = 24), ariko niba ari icyambu kimwe ukurikije IEEE802.3at bisanzwe, ingufu ntarengwa Amashanyarazi abarwa kuri 30W, kandi irashobora gutanga amashanyarazi gusa kubyambu 12 icyarimwe (370/30 = 12).

Ariko, mugukoresha nyabyo, gukoresha ingufu nyinshi mubikoresho byinshi bifite ingufu nkeya ni bike.Kurugero, imbaraga za AP-imwe imwe ni 6 ~ 8W.Niba buri cyambu cya POE kibitse amashanyarazi ukurikije ingufu ntarengwa muri iki gihe, bizagaragara imbaraga za POE z’ibyambu bimwe na bimwe ntibishobora gukoreshwa, mu gihe ingufu z’ibyambu bimwe na bimwe zidashobora gutangwa.POE benshi bahindura bashyigikira Dynamic Power Allocation (DPA).Muri ubu buryo, buri cyambu gitanga gusa imbaraga zikoreshwa, kugirango imbaraga zitangwa na POE switch zishobora gukoreshwa neza.

Reka dufate icyemezo, niba dukoresha 24-port ya POEJHA-P420024BTHn'itsinda rimwe-bandika ubwoko bwa JHA-MB2150X.Dufata ko imbaraga za POE za JHA-P420024BTH ari 185W (Icyitonderwa: imbaraga za porte 24 ya POE ihindura JHA-P420024BTH ni 380W).Ibyambu 12 bifite ingufu, kandi nyuma yo gukwirakwiza ingufu zingufu zemewe, kubera ko ingufu nyinshi za JHA-MB2150X ari 7W, JHA-P420024BTH irashobora guha ingufu 24 paneli ya JHA-MB2150X (185/7 = 26.4).