Smart Home Energy Analysis 2025

If you found this page useful you can buy me a coffee. This helps me maintain this website and add more content.

This is my energy analysis for 2025, to assess the impact of my smart home solar installation project. The project was started in October 2022 and my energy analysis page explains how my returns/savings are calculated. Previous years include: 2024, 2023.

Electricity

February was a pretty dismal month!

• Our historical baseline electricity usage is 422kWh (15.5kWh per day).
• We imported 415kWh for home use (low 10.4kWh, high 23.2kWh, average 14.9kWh). This is a 3.4% reduction on our historical usage and cost £43.81, a saving of £89.93 based on the standard tariff.
• Our home usage was 584kWh (low 9.4kWh, high 26.9kWh, average 18.8kWh).
• We generated 284kWh (low 0.8kWh, high 27.2kWh, average 9.1kWh).
• We exported 152kWh, (low 0.0kWh, high 21.0kWh, average 4.9kWh) and earnt £22.78.
• The Monthly Generation Factor is 284kWh ÷ 6.63kW = 42.8

Gas

For the first time in a long while, we actually used more than our monthly baseline figure. I put this down to me running an experiment this month and leaving the heating on all day at 21.5°C.

• Our historical baseline gas usage for January is 2041kWh, an average of 72.9kWh per day.
• We used 2072kWh this month (daily average 74.0kWh).
• This is an increase of 1.1% on our baseline and a cost of £1.42.

Transport

• We have driven a total of 34,745 miles in our CUPRA Born and spent £1221.19 on electricity to charge it.
• We have driven 1114 miles this month and imported 365kWh into our CUPRA Born costing £25.58.
• Petrol averaged £1.362 per litre giving a saving/return of £156.90 this month.

Electricity

Our home usage was 10.5% over our baseline figure for January and this is due to the dehumidier being on in our conservatory all the time, along with a new 'beer fridge'. Our actual import for home use is lower though and all of this usage has been time-shifted to the super cheap Intelligent Octopus Go tariff. In the winter months, a lot of electricity is used by our tumble dryer.

• Our historical baseline electricity usage is 528kWh (17.0kWh per day).
• We imported 502kWh for home use (low 7.3kWh, high 23.1kWh, average 16.2kWh). This is a 4.9% reduction on our historical usage and cost £43.81, a saving of £89.93 based on the standard tariff.
• Our home usage was 584kWh (low 9.4kWh, high 26.9kWh, average 18.8kWh).
• We generated 284kWh (low 0.8kWh, high 27.2kWh, average 9.1kWh).
• We exported 152kWh, (low 0.0kWh, high 21.0kWh, average 4.9kWh) and earnt £22.78.
• The Monthly Generation Factor is 284kWh ÷ 6.63kW = 42.8

Gas

Despite being a cold January, our gas usage dropped significantly. The primary reason for this is our new gas boiler is much more efficient. The other reason is how I am using it. I've been trying a different approach with my smart control and have been leaving the heating on all day (from 06:00 to 22:30). Our boiler seems to run more efficiently this way and keep our home much more confortable. My Drayton Wiser smart thermostat does an amazing job of keeping the temperature an even 21.5°C within our home.

• Our historical baseline gas usage for January is 3088kWh, an average of 99.6kWh per day.
• We used 2378kWh this month (daily average 76.7kWh).
• This is a reduction of 28.4% on our baseline and a saving/return of £56.63.

Transport

The CUPRA Born has been brilliant over these last cold months. Range has dropped from about 220 miles to around 200 miles. We can still easily do the 180 mile round trip to London and back on a single charge. The remote defrost capability using the app is also a brilliant feature in winter.

• We have driven a total of 33,631 miles in our CUPRA Born and spent £1195.21 on electricity to charge it.
• We have driven 1612 miles this month and imported 528kWh into our CUPRA Born costing £36.94.
• Petrol averaged £1.32 per litre giving a saving/return of £204.29 this month.