Probably not a problem, but its a bit high for my liking. Theres always a voltage pot inside, so if it were me, I'd open it up and turn it down to 14.4 if you have something with rechargable batteries, 13s if you dont. No need to push the internal regulators of your expensive gear on the bench.
BTW unless your American supply is from the 1970s, its undoubtedly assembled with chinese parts.......just like everything else.