Earth Notes: Saving Electricity and Gas (2016)Updated 2021-09-10 19:17 GMT.
Meter readings and energy-saving notes for dual fuel use at home in 2016.
Annual supplier statements state that we are using/importing about 3 kWh electricity and 7 kWh gas on average each day for the year. 2016 was a little colder than the years either side but not remarkable.
2016 data (kWh: e used 1831, e gen -3739, g 3851).
Off-grid 40.1kWh captured by primary (MPPT) solar controller from 2016-08-14.
See gas kWh vs heating degree days (HDD) regression for 2016 as .png chart.
|Month||Consumed kWh (/d)||Generated -kWh (/d)||Consumed kWh (/d)||Period||Notes|
|2016-01||196 (6.3/d)||-71 (-2.3/d)||593 (19/d)||20151231T19:20Z to 20160131T17:48Z (31d)||Meter readings: electricity generation 71.0kWh, export 45.3kWh, import 169.9kWh (thus net consumption (I+G-E) 195.6kWh); gas ~53.4m^3 (so 593kWh @ 11.1kWh/m^3). |
Generation on the first meter passed 21MWh.
HDD12=173 vs 202 last January.
|2016-02||160 (5.5/d)||-141 (-4.9/d)||561 (19/d)||20160131T17:48Z to 20160229T10:09Z (29d)||Meter readings: electricity generation 104.7kWh, export 104.9kWh, import 124.4kWh (thus net consumption (I+G-E) 160.2kWh); gas ~50.5m^3 (so 561kWh @ 11.1kWh/m^3). |
HDD12=172 vs 199 last February.
|2016-03||180 (5.8/d)||-274 (-8.8/d)||497 (16/d)||20160229T10:09Z to 20160331T17:35Z (31d)||Meter readings: electricity generation 273.2kWh, export 220.7kWh, import 127.0kWh (thus net consumption (I+G-E) 179.5kWh); gas ~49.7m^3 (so 497kWh @ 11.1kWh/m^3). |
Passed 20MWh exports.
HDD12=162 vs 138 last March.
|2016-04||143 (4.8/d)||-455 (-15/d)||192 (6.4/d)||20160331T17:35Z to 20160430T17:15Z (30d)||Meter readings: electricity generation 455.0kWh, export 392.8kWh, import 80.4kWh (thus net consumption (I+G-E) 142.6kWh); gas ~17.3m^3 (so 192kWh @ 11.1kWh/m^3). |
HDD12=104 vs 73 last April.
|2016-05||147 (4.7/d)||-756 (-19/d)||141 (4.6/d)||20160430T17:15Z to 20160531T17:41Z (31d)||Meter readings: electricity generation 575.7kWh, export 497.5kWh, import 68.9kWh (thus net consumption (I+G-E) 147.1kWh); gas ~12.7m^3 (so 141kWh @ 11.1kWh/m^3). |
Passed 21MWh exports, and 22MWh+6MWh generation on the two meters.
HDD12=23 vs 30 last May.
|2016-06||132 (4.4/d)||-474 (-16/d)||110 (3.7/d)||20160531T17:41Z to 20160630T16:27Z (30d)||Meter readings: electricity generation 474.2kWh, export 404.4kWh, import 62.3kWh (thus net consumption (I+G-E) 132.1kWh); gas ~9.9m^3 (so 110kWh @ 11.1kWh/m^3). |
Annual supplier statements state that we are using/importing ~3kWh/d electricity and ~7kWh/d gas on average for the year.
HDD12=2 vs 7 last June and 2 the previous June.
|2016 running total (Jan--Jun)||957 (5.3/d)||-1990 (-11/d)||2093 (12/d)||20151231T19:20Z to 20160630T16:27Z (182d)||Implies total footprint to date -46kgCO2: electricity (average 219W gross) -444kgCO2e @ 0.43kgCO2/kWh (netted), gas 398kgCO2e @ 0.19kgCO2/kWh.|
|2016-07||135 (4.4/d)||-585 (-19/d)||126 (4.0/d)||20160630T16:27Z to 20160731T17:45Z (31d)||Meter readings: electricity generation 585.0kWh, export 510.6kWh, import 60.9kWh (thus net consumption (I+G-E) 135.3kWh); gas ~11.3m^3 (so 126kWh @ 11.1kWh/m^3). |
HDD12=0 vs 1 last July and 0 the previous July.
|2016-08||102 (3.0/d)||-563 (-17/d)||75 (2.2/d)||20160731T17:45Z to 20160903T17:46Z (34d)||Meter readings: electricity generation 563.0kWh, export 508.8kWh, import 48.1kWh (thus net consumption (I+G-E) 102.3kWh); gas ~6.8m^3 (so 75kWh @ 11.1kWh/m^3). |
'Long' month since away on holiday a few days into September. Zero gas use and HDD while away. Electricity use ~1.3kWh/d while away, 50% covered by generation.
Latest Ecotricity projections for our annual imports: e ~1300kWh, g ~3300kWh.
HDD12=0 (calendar month) vs 0 last August and 5 the previous August.
|2016-09||132 (4.9/d)||-254 (-9.4/d)||103 (3.8/d)||20160903T17:46Z to 20160930T16:43Z (27d)||Meter readings: electricity generation 254.4kWh, export 210.4kWh, import 87.9kWh (thus net consumption (I+G-E) 131.9kWh); gas ~9.3m^3 (so 103kWh @ 11.1kWh/m^3). |
'Short' month since away on holiday a few days into September.
The load supposedly moved off-grid (~0.3kWh/d) does not seem to have reduced the gross consumption figure.
HDD12=2 (calendar month) vs 14 last September and 5 the previous one.
|2016-10||146 (4.7/d)||-205 (-6.6/d)||201 (6.5/d)||20160930T16:43Z to 20161031T17:12Z (31d)||Meter readings: electricity generation 204.7kWh, export 164.3kWh, import 105.8kWh (thus net consumption (I+G-E) 146.2kWh); gas ~18.1m^3 (so 201kWh @ 11.1kWh/m^3). |
Large tree to SE hard-pruned 2016-10-04 and may reduce 0800Z--1000Z grid-tie generation dip from shading (see after) this month and in spring.
Gas consumption higher than last year as OpenTRV on test this month.
HDD12=38 vs 32 last October and 15 the previous one.
|2016-11||179 (6.0/d)||-88 (-2.9/d)||599 (20/d)||20161031T17:12Z to 20161130T18:12Z (30d)||Meter readings: electricity generation 88.4kWh, export 58.8kWh, import 149.1kWh (thus net consumption (I+G-E) 178.7kWh); gas ~54.0m^3 (so 599kWh @ 11.1kWh/m^3). |
Lots of messing around with OpenTRV algorithms seems to have increased electricity and gas consumption over and above very cold month.
HDD12=154 vs 63 last November and 79 the previous one.
|2016-12||180 (5.8/d)||-88 (-1.7/d)||653 (21/d)||20161130T18:12Z to 20161231T18:29Z (31d)||Meter readings: electricity generation 53.9kWh, export 32.0kWh, import 157.6kWh (thus net consumption (I+G-E) 179.5kWh); gas ~58.8m^3 (so 653kWh @ 11.1kWh/m^3). |
HDD12=160 vs 38 last December and 183 the previous one.
|2016 total (Jan--Dec)||1831 (5.00/d)||-3739 (-10.2/d)||3851 (10.5/d)||20151231T19:20Z to 20161130T18:12Z (366d)|| Gas usage up due to cold winter. |
Not clear why electricity use up again.
Note that grid electricity carbon intensity dropped significantly again in 2016, which would reduce the benefit of our electricity exports, but previous (0.43kgCO2/kWh) figures will be used for comparison.
|kgCO2||787kg (2.2/d)||-1608kg (-4.4/d)||732kg (2.0/d)||~-0.09tCO2 (~-0.24kgCO2/d) gas/electricity emissions total for 4 people, based on 0.43kgCO2/kWh for electricity (netted) and 0.19kgCO2/kWh for gas, ie slightly carbon negative.|
Note that we haven't flown this year again, we still don't own a car and travel almost entirely by (usually-electrified) public transport.