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I hate to disagree but a 2012 Caldera or Hot Spring will keep its temp setting in case of a power outage. I just verified it to make sure I wasn't having a brain freeze by setting one to 103, pwoering down, waiting a few minutes and pwoering back up and sure enough it was still 103. Now if you have that Caldera temp set to one of the special upper temp settings that go above 104º then I think it may go back to a preset temp but if you're in the normal operating setpoint range of 104º or below it will keep your temp with a power outage.
My Epic retains the set information..not sure for how long though