Ours has been going off at least once during every camping trip, and we're pretty sure it's not low voltage, because we have a solar charger and when we check the batteries they're always above 12. Sometimes hitting the reset button works, but .... This weekend we heard other people's going off too (not the same brand), so at least we know it's not just us. Still, it is unpleasant to hear ~any~ alarm in the early morning hours. (Our dog sleeps nowhere near it.) When we get our new TT, about the CO detector is going to be one of the questions we'll want answered in detail.