Effeuno makes high powered commercial level single phase pizza ovens that go up to 509C/948F.
I have never seen anything that runs off a regular household plug (UK 220v) that can go this hot..
This model, with the higher roof arrived last week but today was my first run at it.
Bakes on a thick saputo stone (italian clay). Top element around 450c. Bottom around 425c.
Worked pretty well. wasn't counting the time but i reckon this was less than 2 min to cook. Bottom cooked very nicely.
Kind of makes my ALFA obsolete.