I think the only decent criticisms had to do with incremental technological process, i.e. solar panels are marginally more efficient than they were when the film was made. On the balance though, I don't think this negates the points the film made - the amount of mining, manufacturing and transportation balanced against the in-service life and the energy actually produced make for a very bad story. Burning biomass is also not good for the planet for the reasons outlined in that film and in this comment thread.
I'm a Vaclav Smil fanboy, so I get repetitive, but he has criticized the renewables industry pretty consistently and long before Michael Moore's film, so his material may be worth a look for those that want a stronger critique that doesn't have Moore's name in the sentence. "Energy and Civilization: A History" is a great book of his, and was relatively recently updated.
I'm a Vaclav Smil fanboy, so I get repetitive, but he has criticized the renewables industry pretty consistently and long before Michael Moore's film, so his material may be worth a look for those that want a stronger critique that doesn't have Moore's name in the sentence. "Energy and Civilization: A History" is a great book of his, and was relatively recently updated.