Powering Moving Set Pieces and Props?

My 2 cents: We were recently facing similar dilemma for a human-powered parade wagon, with spinning Globe , LED lites, and bubble machine...the plan was inverters/ 12V/ etc. During one of our tests, at home, the power went out in neighborhood & our "battery-backup" started chirping periodically as it sustained our computers. Eureka, we had a more elegant/ simple solution! (did require finding a way to disengage chirper on the unit). Tested fine for 2 hr runs, Parade only lasted 1hr.
K.I.S.S.
 

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