Earth Notes: Saving Electricity and Gas (2024)

Updated 2024-02-26 11:22 GMT.
By Damon Hart-Davis.
Meter readings at home. #4kWhDHWClub
20240101 heatBatTarget
2024 PV Output
Meter readings and analysis of our electricity and gas carbon footprint at home in 2024.


See the daily PV generation logs for 2024 as .csv and .png chart.

Heat Pump This Year?

Given that our old-ish gas combi boiler continues to struggle, I requested an on-line Octopus heat-pump quote and got in the queue.

If we do get a heat pump that will be our last use of gas gone, and we could maybe have it disconnected to avoid the standing charge.

In any case, the replacement would likely push our energy carbon footprint back negative, as I had hoped for when installing the solar PV.

2024 Fuel Consumption Data
MonthConsumed kWh (/d)Generated -kWh (/d)Consumed kWh (/d) PeriodNotes
2024-01 328 (10.6/d) -74 (-2.4/d) 495 (16.0/d) 20231231T16:13Z to 20240131T18:23Z (31d) Meter readings: electricity generation 74.3kWh, export 0.7kWh, import 253.9kWh (thus net consumption (I+G-E) 327.5kWh, self consumption ((N-I)/N) 22%); gas ~44.6m^3 (so 495.2kWh @ 11.1kWh/m^3).
The kitchen MHRV motor was replaced and is now quiet again.
The Enphase emailed monthly report for January (triggered 2024-02-01) says: produced (generated) 74.5kWh (max 4.4kWh on the 26th), consumed 319.8kWh (max 17.6kWh on the 20th), grid energy imported 261.5kWh and exported 0.3kWh, grid dependence 82% (min 50% on the 18th).
HDD12=199 vs 194 last January.
~526 words.