3 ms·

I'm not sure about the middle east but they're incredibly common in the Mediterranean (Greece, turkey, Spain etc).

• kyuudou 6y ago
  Also Japan (along with whole-house solar power)
• dvirsky 6y ago
  Super popular in Israel, nearly everyone has them, unless it's a tall building where there's not enough roof surface area. It will pay for itself in electricity savings in a year or so.