I tried it, but it still shows the old values. Maybe the problem is that I also have Clockwork mod that increases day/night time and multiplies the battery capacity accordingly?
Also, what about the solar panel? The vanilla one is 100 kW, and the alien one only 120 kW, which makes it a very small upgrade (especially compared to the difference in accumulators). Maybe that should be raised to 200 kW as well?