Outstanding news. Hydrocraft will live on, and you can get a well deserved break from it. Thanks Hydro for the hours of memories and enjoyment you can to thousands of players!
Definitely sounds like a bug. I play on a server with safehouses and all the same mods except (ORGM Silencers/Craft Helper/Log Wall Gates). So if there is some kind of mod conflict, I would start looking at those 3 mods.
Known issue for a few updates now. All attempts to fix it have failed. It happened when the devs updated the base generator code. It removed the exploitable bug that makes the solar gen work all the time.