My first smoker was an electric ECB. The heating element sat in a pan surrounded with lava rocks and wood chunks thrown on the lava rocks closest to the heating element. The setup smoked well, actually.
As for power outages, that was never an issue as we seldom have outages here. But I can see weather related outages occurring in other regions. That could be a concern for some.
....UDS....Mini-WSM....Midi-WSM....Mod-ECB....22.5-OTG....34"wood fired pizza oven....