I'm still waiting too. It's now been 11 weeks. My return was accepted on Feb 11, and yes, I filed for the solar credit. Received my state refund within 1 week. Still shows as "accepted" on IRS "Where's my Refund" but of course, not approved.
The only consolation is that so many others are in the same boat. Misery loves company I guess. Like others, I could've used the money a long time ago. :(
