ManseEnergyData - The Psalter

Energy Usage 15 Southdown Avenue 2022

Data from NeilPeters March 2024 with thanks. This is the most recent year where the manse was fully occupied.

Gas

28/10/21 to 30/12/21	1884 MJ
31/12/21 to 01/03/22	195 MJ
02/03/22 to 02/05/22	1325 MJ
03/05/22 to 29/06/22	15211 MJ
30/06/22 to 31/08/22	19121 MJ
01/09/22 to 03/10/22	8002 MJ
Total for 12 months	45738 MJ equivalent to 12705kWh

Compare to 5480MJ for the church buildings.
Note that this is both gas boosted solar hot water and gas space heating, and that both will be seasonal, so they cannot be separated. The solar hot water needs very little boosting in summer, but more in winter.

Electricity

Period	kWh imported	kWh exported
05/12/21 to 04/01/22	227	85
05/01/22 to 04/02/22	304	497
05/02/22 to 04/03/22	246	437
05/03/22 to 04/04/22	245	335
05/04/22 to 04/05/22	255	219
05/05/22 to 04/06/22	324	126
05/06/22 to 04/07/22	364	71
05/07/22 to 04/08/22	358	135
05/08/22 to 04/09/22	342	156
05/09/22 to 04/10/22	252	307
05/10/22 to 04/11/22	244	346
05/11/22 to 04/12/22	245	431
Total for 12 months	3406	3145

Converting to emissions this becomes:

Item	Amount	Unit	unit CO2e	Emissions	Contribution
Gas	45738	MJ	0.05553	2539.831	61%
Electricity	3406	kWh	0.473	1611.038	39%
Total				4150.869

(Thanks to BarrieMay for this analysis.)

For this period #15 bought about 10% more electricity than it sold.
In round terms, gas energy was 80% of the total and contributed 60% of the emissions. This last figure will rise as the grid decarbonises.

The financial cost of the 46GJ of gas to the minister at about $30/GJ is about $1400/year. Replacing this with heat pumps would require about 13,000kWh divided by the performance coeffient, say 4, giving 3000kWh at 30c/kWh = $900. This assumes 100% efficiency of the gas heating. Sustainability Victoria suggest somewhat greater savings.