This one can be adjusted up to ~ 19.8V, which should be away far enough from the 24V limit. My problem with this supply ist the lack of information about this brand. Has any of you heard of Enstick before? All I found was a trademark registration by FDS System Spolka Z O.O. from Poland. Sadly, their website does not tell any details about these power supplys.
So what to do? Try one of those nearly unknown Enstick power supplies? Take a safe bet and choose something from well known Mean Well? Sadly, they seem not to make any 18V supplies. Would it be a risk to try a 24V model adjusted down to around 22.8V?