It depends on how you define the word "solo". Gene Simmons solos' usually lats around 10 minutes but he really doesn't do much during them other than play a couple of random notes and then get hoisted to a platform above the stage. At that point he spits blood, plays a little more and then the band goes into a song, usually "God of Thunder".
"If you don't want the truth don't ask. Make up your own like everyone else does". (Michael Pare as Eddie Wilson/Joe West in Eddie and The Cruisers II).