The 20 Gallon water heater is all hooked up. Wife has stop complaining about shower not hot enough. Mission accomplished. Almost. Now I have to tweak the new system for the best possible efficiency.

By my estimates, the big tank with the hot water heat pump, is sitting at 110 Degrees. I am going by the know on the heat pump so I think it will be close to that. The Small tank is sitting at 130 degrees. This was all done so that after I hooked the system up everything would work. That is to say, I would not get into trouble for messing around and still not have hot water. Now I have seen a drop in energy usage by the heat pump. After three days the average usage is 3.5kW hours a day. This is much better than 6kW hours a day that I had before. I know that I am using more electricity with the small tank. How much more? I do not know. After I get the new TED 5000 I can use the old TED 1000 just for the small electric tank. My guess would have to be about 4kW hours a day. So my total is up to 7.5 Kw hours a day just to heat water. That is a lot of electricity for hot water. But much better then the 13kW hours a day if I used only electric heating elements.

The Plan: Wait for now.

I think I need to better understand what I have with the new system. Then I can start making changes.

After I have some more data. I think the first thing I will do is lower the small tank by five degrees.

Then I may raise the big tank by five degrees. But, I do know that the heat pump efficiency decreases when the tank temperature increases. Personally, I think that when you approach 130 degrees tank temperature when an ambient temperature of only 60 degrees, you are getting close to only 100% efficient. Since I can not measure that at the moment, my educated guess will just have to do.

In the summer I hope to have the small tank and the large tank at the same temperature. (115 degrees) Then the small tank should never turn on unless the demand is very high.

Advertisements