Earth Notes: Saving Electricity and Gas (2020)

Updated 2020-04-01 09:48 GMT.
Meter readings and energy-saving notes for dual fuel use at home in 2020.
Meter readings and analysis of our electricity and gas carbon footprint at home in 2020.


See the daily PV generation logs for 2020 as .csv and .png chart.

2020 Fuel Consumption Data
MonthConsumed kWh (/d)Generated -kWh (/d)Consumed kWh (/d) PeriodNotes
2020-01 230 (7.4/d) -63 (-2.0/d) 487 (16/d) 20191231T18:17Z to 20200131T18:15Z (31d) Meter readings: electricity generation 63.4kWh, export 13.1kWh, import 180.3kWh (thus net consumption (I+G-E) 230.6kWh, self consumption ((N-I)/N) 22%); gas ~43.7m^3 (so 487kWh @ 11.1kWh/m^3).
Unusually high electricity consumption possibly in part from extra use of dehumidifier in kids' bedrooms (which could really do with their own MHRV).
HDD12=142 vs 218 last January. (Warmest Jan since 2008.)
2020-02 197 (6.8/d) -127 (-4.4/d) 434 (15/d) 20200131T18:15Z to 20200229T18:15Z (29d) Meter readings: electricity generation 129.9kWh, export 49.9kWh, import 120.1kWh (thus net consumption (I+G-E) 197.1kWh, self consumption ((N-I)/N) 39%); gas ~39.1m^3 (so 434kWh @ 11.1kWh/m^3).
High electricity consumption possibly in part from extra use of dehumidifier in kids' bedrooms again.
HDD12=128 vs 132 last February. (Warmest Feb since 2008 barring 2014.)
2020-03 213 (6.9/d) -337 (-11/d) 359 (12/d) 20200229T18:15Z to 20200331T17:50Z (31d) Meter readings: electricity generation 337.3kWh, export 209.1kWh, import 85.2kWh (thus net consumption (I+G-E) 213.4kWh, self consumption ((N-I)/N) 60%); gas ~32.3m^3 (so 358.52 @ 11.1kWh/m^3).
Decent sunshine and thus solar gain on some days has reduced space-heat demand.
A lockdown for coronavirus started formally on the 23rd, meaning that all four of us are at home all the time other than Jean's lunchtime gig at school, and the odd walk. (Note that we had partial lockdown for a little before that as I was self-isolating and then the family had to stay in for a few days too, as rules changed.)
Being at home all day means possibly slightly more able to manually match electrical loads (eg the dishwasher) to PV generation, thus increasing self-consumption a tad.
Turned central heating off 2020-04-01T09:43Z; house may get a bit chilly! If the heat battery project had been done, I'd basically expect gas demand to stop now.
Loop electricity monitor seems to have died on the 22nd.
HDD12=142 vs 89 last March.