It's a DIY heat pump + solar PV hot water heater. (See pic above).
I was thinking about getting it out in the yard and ripping off the top cover and the foam insulation.
I could pressurize the tank, find the leak and weld it shut.
Then re-install everything..
But, that seems like a lot of work for a tank that might not last more than a couple more years.
I'm 73 years old and not real sure that I want to be hauling 100+ lbs of junk up and down the basement stairs, when I'm 75.