I have tried this with numerous scenarios, including Commonwealth and the tutorials. I am using 1.14(3), so I am up-to-date.
Everyone of my diesel subs refuses to recharge their batteries. I have risen to periscope depth and have set my speed to Creep, but the battery power remains the propulsion system (not the diesel) and the battery continues to drain.
If you could try this with any of your scenarios to see if yours works, that way could could isolate the problem to just me.
But, I have tried upgrading the DB (I'm using the current one), so that isn't it, either.
Please let me know if anyone else is experiencing this.
EDIT: Recharging at periscope depth does not work. But, if I go to the surface, then it will re-charge. I have tried this on at least 8 different scenarios.
Also, if your sub is at zero battery, and if your are below the surface, even at periscope depth, the sub WILL not re-charge the battery or even rise to the surface at all.
< Message edited by Dimitris -- 5/12/2018 3:25:10 PM >