File:Tech - Efergy Graph 1A - Hub A for 2017-07-19.jpg

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Power usage for July 19, 2017. The X axis shows time of day (midnight to midnight in military time); the Y axis shows kW (1000 watts). Its max is 4.00 kW or 4,000 Watts.

A1B-Mains (red) is our Main (total house) power. Conceptually, this line adds the other nine (A2 to B5), but it is in fact its own independent measure - which helps confirm the others. The "B" in "A1B-Mains" is because I had to replace my previous A1.

A2-HVAC-A (dark green) is the Attic HVAC system. We don't go upstairs during the day much; we set it to 86 °F then, and it kicks onto 79 at 11 pm (to 8 am). But notice how this HVAC is on, and not the basement HVAC, early in the morning (to the left; early morning hours). You would see the same thing if you could scroll this graph to the right.

When our upper HVAC comes on long after the attic has cooled off, we have huge energy savings. It gets incredibly hot in the attic where the upper HVAC is - my sensors say 120 to 130 °F - and it's an incredible uphill struggle to keep your upstairs cool on a hot day, when the sun is still making your roof a furnace. But if it kicks in at 11 pm? SAVINGS!! Not everyone can do this. But we can, and I love it.

A3-HVAC-B (lime) is the basement HVAC, for both basement and main floor. Always set at 79, it came on around 11 am as the sun heats our house and stayed on during the day, as you can see. It gets shut down quick by the attic HVAC; you can see it doesn't come on at all in the wee hours.

A4-Dining+OBRs (yellow) is our seldom used rooms (dining and other unused bedrooms). Sort of an odd-man-out that only comes on when we use these rooms.

A5-Laundry+Cape (orange) is our laundry and cape (kitchen peninsula). Usually very low, except when laundry or coffee maker spikes it.

The inset is highlighting ~11:12 pm, when our upstairs HVAC has kicked in, and the downstairs HVAC is on. I highlit this because of how extreme a point it is. Notice how the downstairs HVAC backs off when the upstairs HVAC kicks in.

Weather for a Wunderground station near us shows a high of 98.1 F that day. Compare its temperature chart over time to our HVACs over time.

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Date/TimeThumbnailDimensionsUserComment
current11:23, 22 July 2017Thumbnail for version as of 11:23, 22 July 20173,605 × 1,559 (431 KB)MikeFay (talk | contribs)Power usage for July 19, 2017: A1 is our Main (total) power. The B is because I had to replace my previous A1. A2 is the Attic HVAC system (HVAC-A). We don't go upstairs during the day much; we set it to 86, and it kicks on at 11 pm (to 8 am). A3 is...

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