Magic blocks are the death of most mods.
If there is one thing Eloraam screwed up with it is blutricity, she made it use a ton of very low power generators powering low power machines, should have added some high powered machines and proper generators (instead of the "infinte" generates like solar and the thermophile).
Bare in mind that Redpower is still in pre-release and she has got higher power machines planned.
And also of course solar panels and thermopiles are infinite! They are renewable energy sources that exist in the real world!
Read through some of the stuff she says here http://www.minecraftforum.net/…nKey%5D=&userMode=content
She talks about the tech tree she has laid out already for the future of RP and the different tech levels of machines etc. 