I may be wrong, but solar energy might not be able to be harnessed for a forge. You'd have to either make everything electric and use solar panels to convert it to usable energy, or find a really good way to concentrate the light into a focused beam hot enough to make the metal malleable. Then again, I'm also not a blacksmith or an engineer.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf