We had our maiden voyage with our PUP last weekend and on our second night the CO alarm started going off in the middle of the night. We were dry camping and it had been overcast during the day so our solar panel didn't do much good. The voltage reading on the battery was roughly 12.4- I didn't think it would be going off at such a reading but it was.
Our lights were still working fine and such.
We hooked it up to the TV and charged for a bit and we were good to go until we could get some solar power the next day. Now I know. I was all over measuring the voltage the remainder of the trip- didn't want another long night!