I was planning to buy the Rheem from Home depot (10% Veteran discount!)
But then I became aware of this thing, and alte sells them!
FREE Shipping! Stiebel Eltron Accelera 220E heat pump water heater works like an air conditioner but instead of dumping the heat outdoors, it puts it into the water. Up to 80% more efficient!
www.altestore.com
I have learned to fear any technology designed by Germans.
All the German cars, motorcycles, cameras, technology, etc. I have owned was FAR more complicated than it needed to be.
My FIL was a German Chemical Engineer, congenitally and pathologically unable to design and build anything simple.
We did many projects together around the house, over the years.
Took all day to frame & trim a door in our house, for instance.
It is an elaborate thing of beauty, but it's still just a door.
Anyway, masochist that I am, might try a Stiebel Eltron Accelera
Heat Pump Water Heater