Hi there! it appears the person before me posting had the same/similar issue i did. All my crewed vessels have sufficient power - but whenever i unload that vessel, the solar panels just stop working until it is reloaded. I have Kopernicus installed also, using OPM and Minor Planets expansion. I'm using stock solar panels on the vessels that are having fits, if you need any further information i'll be happy to provide anything i can to assist you.