Is there a way to permanently reduce my wait time for my Energy Bar to refill?

Yes, but you will have to reach a Final Ending at least once and then use a Replay Token. Replay Tokens can be used at any time. However, if you reach any Final Ending (Dead Ends do not count) and then use a Replay Token, your wait time will change from 60 mins per Energy Point regained to 30 mins. This change will be permanent and will not change once another Final Ending is reached and/or another Replay Token is used. Learn more about NC Tokens in the Kanrik Chronicles NC FAQ.