Our gas was disconnected in mid April so we are all electric now including our car:
Gas 5284 (Jan - April)
Electric Imported 6321
Electricity Exported 5728
Solar generation is 8015kwh (2287 was consumed directly with the rest exported as above).
I’ll do a round up at the end of the year but I expect the bill to be around £0.
Our total energy consumption was 8893kwh electric and 4828kwh gas for the year. The gas was fully disconnected on 17/4/2024.
My total bill for the year came to £108.28, this includes gas up to 17/4/2024 which was £359 and driving our Model Y 10,000 miles.
We imported 6605kwh and exported 5738kwh.
My savings for the year from the solar was: £1,891.33
This breaks down to:
- solar self consumption: £624.45
- solar export: £860.68
- Solar to battery to house: £27.17
- Battery time shifting: £379.03
Based on the above, the solar will fully pack back in 7 years, not bad for an array that points east and west. If you are still on the fence on solar, get off it and get on the gravy train.
I don't have data from what the heat pump is saving, there definitely is some alongside the obvious saving of the £100/year on standing charges.
Some of it is captured above in the form of solar self consumption and grid charging the battery. However a load of it is from time of use tariff savings which I don't have the data to come close to a number. I don't run the heat pump for maximum efficiency, I run it for lowest cost based on the IOG tariff.
I'm ranging between 30% and 100% off peak (7p/kwh) looking at some sample days. 100% being when it is only doing hot water and 30% which was my highest consumption day at 27.31kwh (21/11). Typical daily consumption over December was 12.5kwh and 40%+ off peak.
That said the motivation for the heat pump wasn't running cost saving, it was actually cheaper to install than replacing my existing gas system with another one. It's turned out to be both cheaper to install and run, happy days. The carbon savings are also massive but that is just the icing on the cake.
Might even be a little bit positive?
Not quite.
