2023 November

November's weather was more spring like (median temperature 19.3 °C). The HRV was mostly in the cooling season and we openned the windows a fair bit in the evening / night when it was cool out, and the split system was typically cooling during peak solar production. At the end of the month when we had significant rain the dehumidifier ran for a week or so during the day to help dry clothes. Outside temperatures ranged from 10 to 34 °C, while inside we were a comfortable 20.1 to 24.7 °C.

Temperature from inside and outside the house as the percentage of hours in 0.5 °C bins. I've scaled the temperature in hope that I will be able to use the temperature range for all months.

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).

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.

The first of December also means a new season (at least in the Australian calendar sense of that term). So here are the same plots as above but for Spring 2023. The house was 97% in the passive house target range (20 - 25 °C). The inside temperatures ranged from 18.6 to 26.1 °C while outside temperatures ranged from 3 to 36 °C. The relatively rapid switches between cool and hot weather in October were particularly challenging for the HRV as it had no way of knowing that while the last few days were hot that the next few would be cold. From our perspective we were in our target range (18 to 25 °C) for 99.6% of the time, but lets be honest... coming in from 36 °C outside to 26 °C inside felt really good! We produced more electricty that we used over spring 2023.

Spring 2023 temperature from inside and outside the house as the percentage of hours in 0.5 °C bins. I've scaled the temperature in hope that I will be able to use the temperature range for all months.

Spring 2023 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).

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