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Another Duke Energy Bill Problem - Part 4

By Sid of Stone Marmot

March 25, 2016

Figures 1 and 2 show my power meter readings as of 4:37 pm today. See my article Stone Marmot Goes Solar: Part 6, Modern Power Meters Don't Run Backwards for info on how to interpret these readings.

Figure 1- March 25, 2016, meter reading of net power flowing out of house (same as current received on power bill).

Figure 2- March 25, 2016, meter reading of net power flowing into house (same as present actual on power bill).

Notice that the “Present” reading in Figure 2 is much higher than previous days. Usually I use 1 to 2 kwh a day. But this shows 8 kwh more than yesterday's reading. That is because I did laundry this morning. I wait until I have two full washer loads before I do laundry. These two washer loads plus one dryer load typically use about 5 to 6 kwh more than usual, with the dryer using most of this power.

It was also cloudy all day, raining off and on, with almost no direct sunlight. So I had little photovoltaic solar power generated to offset the power used. But even under these rather adverse conditions, Figure 1 still reads 2 kwh more than yesterday. It is very rare that I don't show a surplus of power generated at the end of the day, maybe 10 or 15 times in the over six years I've had this system. And five of those days were when the solar panels were removed from my roof while the roof was being replaced.

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