Earth Notes: Saving Electricity and Gas (2021)

Updated 2021-02-04 16:34 GMT.
Meter readings and energy-saving notes for dual fuel use at home in 2021.
Screenshot 20210118 System Admin Login Only legacy system closed
2021 PV Output
Meter readings and analysis of our electricity and gas carbon footprint at home in 2021.


See the daily PV generation logs for 2021 as .csv and .png chart.

2021 Fuel Consumption Data
MonthConsumed kWh (/d)Generated -kWh (/d)Consumed kWh (/d) PeriodNotes
2021-01 243 (7.8/d) -53 (-1.7/d) 592 (19/d) 20201231T18:13Z to 20210131T18:17Z (31d) Meter readings: electricity generation 52.7kWh, export 5.8kWh, import 196.4kWh (thus net consumption (I+G-E) 243.3kWh, self consumption ((N-I)/N) 19%); gas ~53.3m^3 (so 592kWh @ 11.1kWh/m^3).
Record high electricity consumption possibly in part from extra use of dehumidifier in kids' bedrooms (which could really do with their own MHRV), and national lockdown so more of everything including dehumidifier. Undoing lockdown gross consumption lift of ~20% would get us back to 6.5kWh/d, a far more reasonable winter figure!
Allowing ~4kWh/d for DHW, space heat is ~1.9kWh/HDD12 vs 2.6 last January. Warm bodies at home and the dehumidifier will have reduced space-heat demand, along with having most Radbots on 2 (17°C) rather than 3 (19°C).
HDD12=241 vs 142 last January.
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