UPS means uninterrupted power supply, which is like a battery, often used for computers. You know this right?
Ya, I got sold....I am not proud if it. What did it was that my old tank came close to rupture before I noticed and I have a lot of expensive stuff in the garage...I was thinking that I got rid of the danger of a flood and also would over the long haul save money. It was also a rush decision, as my tank was in very sad shape. What I did not know however was that due to energy savings not being as great as claimed water use going up because of the damn thing plus the cost of changing over from tank to tankless that there is almost no chance that I will ever get my investment paid back. It was the uneconomical choice, plus it vibrates my kid's wall and thus makes noise inside the house, plus waiting longer for hot water is a pain in the ass.
I pride myself on being smart and making good choices, this was an unusual bad choice from me so it sticks in my craw.