Bosch Water Wizard 960 - instaneous gas hot water heater. It is 2nd hand, so comes with no warranties/ no guarantees.
The unit is about 8-9 years old, running on natural gas, and was still working per normal when decommissioned for solar hot water.
Would be glad for it to see out it's useful life ... instead being trashed.
It does NOT need power, as a pilot is "click" button lit. It is NOT temp regulated at 50 DegC, so the water is nice and hot.
I have the "Installation / Operating Instructions" booklet on hand.