I think it does not lie in the realm of my interests now. The profit is to small.:shucks:.

evan82, try JSGME and you will be surprised that it does! You can make Mod and enclose the
instruction in Readme files!

After these modifications I may have made an error in the .sim file as my XXI boat spawned at an elevation of 500 meters above the sea! and slowly spun downward into Bergen Harbor and was destroyed! All is not lost as I had in the past repaired the Type XXIII boats recharge times based on the KTB entries of OL. z. S. Karl Jobst of U-2326. The boat would Ventilate each day at 15:30-15:40 and Recharge each day at between 23:45-24:00 for about 3-3.5 hours pausing each hour for 5-10 min. for all-around-listening. Trial and error brought my recharge time to these actual KTB entries by adding the diesels 572hp+the E-Motors 568hp+ the Creep Motors 46hp= 1186hp on the diesel and achievable at a speed of 4kn-8kn depending on sea state in 3hrs. after a stand of speed 4kn distance 140km.
This also applies to the XXI and works as well as Evan's method and either way brings recharge times where they should be. However the real change came when I added a third set of batteries as per prototype. The Plans show AKKUM Raum 1 ( the Aux Battery which was for the creep motors and is the Stage one recharge ) in the aft room and partial in the command room I added the Battery here. Akkum Raum 2 stage two recharge and 3 stage three in the recharge in the fore room. We have aft batteries and fore batteries in sh3 and adding the stage one aux. ( either adding another aft battery to the fore room or in the command room ) battery now reduces power consumption during a stand of 24hrs to the point where at 4kn your battery level is at 88-90% keeping your battery level in stage 3 charge levels and a 2.5 hour recharge time. I submit this to evan82 for Follow Up Testing if he so desires to facilitate realistic charge, range, and battery consumption. I tested a submerged stand at 8 knots with a beginning to end waypoint of 220km which should discharge all three batteries. About 40km before I reached my waypoint I was at 10% battery, speed fell off to 3kn and discharge in this stage 1 battery usage stopped ( sh3 does that )and the XXI acted like it was running on the creep motors. I then snorkeled for 7+hours and reached a full recharge at a speed between 5-8 knots seas were calm.
I am satisfied with these results but they do need further testing and knowledge of editing to the Basic.cfg file. to add the battery. I believe this will fix the Type XXI to a more realistic boat with realistic performance.

Because You need to start a new career if You want to change gravity center of the boat and diesel power. This was normal error i think. It's good to know, that You solved problem by create your own settings soup for your self taste.