[Greenbuilding] Opinions on electric tankless HW heaters?

[Richard Garbary]

Here is recent consumption information:

Biggest consumption is the water heater which I rewired from 240/3000 watt
to 120/750 watt. This was simple to do (but took a lot of nerve!). By
connecting 120 volt to existing 240 volt water heater the elements output
1/4 the wattage. A timer switches on and off as follows: 21:30on - 22:30off,
23:30on - 24:30off, 1:30on - 2:30off, 3:30on - 4:30off, 5:30on - 6:30off.
This simulates 375 watt continuous on for the water heater as per the graph.
Fridge is on a timer also that simulates this pattern. Fridge does not come
on at all during the peak (red) periods; only green and yellow. This creates
a very flat consumption pattern over 24 hour period.

[image: Daily TOU Breakdown Hourly.png]

[image: Daily TOU Breakdown - April.png]


[image: TOU Price Breakdown April Summary.png]

Regards,

Richard
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