2021 November (+ Spring)

New normal version 2.0 for November: kids in School and the parents working from home ~4 days per week. The split system was off for the entire month and the HRV slid in and out of 'cooling season' and neutral modes of operation more times that I could keep track of. The HRV did a great job of keeping the house in the comfort zone (if I could set the cooling season trigger in half degree increments we would have bit in range a bit more). It was an abnormally wet and cool November.

Temperature from inside and outside the house as the percentage of hours in 0.5 °C bins. I've set the temperature range in hopes that they will be comparable across months.

November temperature

Methods: I have taken the 5 minutely data from the wirelessTag sensors and calculated the median temperature for each hour and determined the proportion of hours falling inside of the 20 - 25 °C target temperature (using the R functions 'aggregate' and 'hist'). Inside includes data from the wirelessTag sensors spread across nearly every room of the house. Outside is the data from the wirelessTag sensors outside near the cubby house and HRV intake. The water wall and door data are not included.

Energy production and consumption: 1. total daily consumption daily energy production, 2. daily net energy production, and 3. energy independence (which is the percentage of our daily consumption that is met directly by our solar panels). We hosted an American style Thanksgiving diner in November -- and apparently ~ 22kWh is what it takes to keep the oven hot all day and to run the dishwater a few times! You can see how rainy it has been with a big spread in daily electrical generation.


Methods: Data are taken from the Enphase Enlighten system. This reports solar generation and electricity consumption as well as import from and export to the grid in 15 minute intervals. The R function 'aggregate' is used to create daily values and the function 'vioplot' to create the plots. The plots show individual days as points, with the vertical black bar covering the middle 50% of the data, the big white circle is the middle of the data (median), the whiskers extend to the farthest points from the median that are not more than 1.5 times the interquartile range, and the grey 'violin' shows the distribution of the datapoints where the narrow portions indicates few datapoints and a wide portion indicates more commonly occurrence... much like a histogram.


It is also the end of Spring and the beginning of Summer, so here are the same plots, but for the Spring season (which includes the months of September, October and November.  Exact same methods as above, but all the data for the 3 month period.

Solidly in the nice indoor temperature range: lowest temperature was 19 °C and the highest was 26.3 °C with an average of 22.9 °C.  Over the 3 months (2184 hours): 14 hours (< 1%) below 20 °C and 83 hours (3.8%) above 25 °C.

Spring temperature




Solidly energy positive: Daily average generation 14.5kWh, daily average usage 11.8kWh, or ~ 2.7kWh/day net generation.
Spring electrical usage / generation.

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