I think that I have a potential bug which I couldn't find in this topic so far. My space station placed in Kerbins low orbit shows as "in shadow", even though it is NOT. Therefore, the vessel monitor constantly shows low EC warnings. However, when I focus on the station (i. e. "switch to"), the batteries recharge normally when in sunlight.
EDIT: The latest Kerbalism update solved the problem. Thank! Keep up the great work!