Considering solar flowers constantly outperform nuclear power without config adjustment and only GregTech's fusion power tops it eventually, if you're the least bit interested in balance solar power is grossly overpowered for what it does and always will be so long as it doesn't require moderately expensive maintenance.
Solar panels having a finite lifespan before either breaking totally or needing repair would clear up the problems with them very quickly, as has been mentioned in the thread.
What makes this a problem is that as it stands, with solar power being as good as it is, you might as well remove all the alternative methods of power generation from the mod as it's wasting RAM.
MANY players do NOT value balance at all which is the problem with this change. Rather than adding in a middle tier to ASP for the current normal recipes and moving the old ones to an easy setting proves how worthless the developer is IMO. IF you force your idea of balance in your mod it's a terrible mod, plain and simple.