Hi Almot,
Lowest I've seen is 99.
If you compare the Sola to the Hughes, Frank's or Surge Guard autoformers you may see how it outperforms those items. Those three don't buck voltage at all. And the Sola is at 1/2 the price, too!
Almot wrote:
Is it Sola in the picture by Briansue?

If I read it correct, when voltage drops to 90 - you'll get 109, and when it shoots to 150 - you'll get 134. Doesn't look too comfortable.
Is there anything with 30A input that keeps output 110V+-4% withing say, 90-155V input range, and shuts down when it can't keep it? Not just a "mejor voltaje", but "correcto voltage"?