I'm here to suggest something.
At first, here are the reasons why I will suggest somethings:
1- I think the Advanced Solar Pannel is too easy to get. 1 Advanced machine, 1 Advanced alloy (for the reinforced glass), some circuits and 1 Ura ... that's not a lot of ressources for something that can store energy, produce 8EU/t and 1 during the night.
2- Even if I like the fact you implemented some rare ressources for its creation (eg. Uranium), I dislike the fact it makes it obsolete as a Fuel for Nuclear Reactor. I guess servers using your addon don't have a lot of Nuclear Reactor ... even no one would I say. What about making it based on diamonds ? (because, diamonds could be useful as a transparent material).
If you don't like the default recipes then enable hard mode ones... as stated right there in the OP.