Smart Home Energy Analysis 2024

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This is my energy analysis for 2023, 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: 2023.

Electricity

• Our historical baseline electricity usage for April is 392kWh (13.1kWh per day).
• We imported 283kWh for home use, with a low of 7.6kWh, a high of 15.3kWh and an average of 9.4kWh. This is a 27.8% reduction on our historical usage and cost £44.57, a saving of £51.51.
• Our home usage was 387kWh (low of 7.6kWh, high of 16.3kWh, average 12.9kWh).
• We generated 735kWh (low 10.1kWh, high 44.1kWh, average 24.5kWh).
• We exported 566kWh, (low 5.6kWh, high 37.7kWh, average 18.8kWh).
• We earnt £94.8 exporting solar energy (low £1.03, high £6.18, average £3.16).
• The Monthly Generation Factor is 735kWh ÷ 6.63kW = 110.8.

Gas

• Our historical baseline gas usage for April is 1460kWh, an average of 48.7kWh per day.
• We used 1080kWh this month (daily average 36.0kWh).
• This is a reduction of 25.6% on our baseline and a saving/return of £15.25.

Transport

The average rate has increased to 4.1p per mile as we have charged the CUPRA Born on the day rate on several occasions.

• We have driven a total of 21,538 miles in our CUPRA Born and spent £889 on electricity to charge it.
• We are mostly charging our CUPRA Born over night on the Octopus Flux tariff Flux rate (15.15p/kWh), to export as much solar energy as possible.
• We have driven 1612 miles and imported 460.2kWh and put 21kWh of solar energy into our CUPRA Born costing £75.10.
• Petrol averaged £1.46 per litre giving a saving/return of £186.10 this month.

Electricity

• Our historical baseline electricity usage for March is 387kWh (12.5kWh per day).
• We imported 352kWh for home use, with a low of 9.3kWh, a high of 18.1kWh and an average of 11.4kWh. This is a 9.0% reduction on our historical usage and cost £69.84, a saving of £43.86.
• Our home usage was 489kWh (low of 9.3kWh, high of 23.4kWh, average 15.7kWh).
• We generated 515kWh (low 2.0kWh, high 33.5kWh, average 16.6kWh). This is quite a bit higher than the 442kWh generated in March 2023.
• We exported 342kWh, (low 0.1kWh, high 26.62kWh, average 11.0kWh).
• We earnt £64.00 exporting solar energy (low £0.02, high £4.89, average £2.06).
• The Monthly Generation Factor is 515kWh ÷ 6.63kW = 77.7.

Gas

As expected, our gas savings this month were much lower. This is simply because we are paying almost half the kWh rate on the Octopus Tracker (December 2023 v1) tariff that we were paying on the variable rate tariff.

• Our historical baseline gas usage for March is 2012kWh, an average of 64.9kWh per day.
• We used 1468kWh this month (daily average 47.4kWh).
• This is a reduction of 27.1% on our baseline and a saving/return of £21.60.

Transport

The average rate has increased to 4.1p per mile as we have had to charge the CUPRA Born during a the day rate on several occasions.

• We have driven a total of 19,926 miles in our CUPRA Born and spent £821 on electricity to charge it.
• We are mostly charging our CUPRA Born over night on the Octopus Flux tariff Flux rate (15.15p/kWh), to export as much solar energy as possible.
• We have driven 1431 miles and put 438kWh into our CUPRA Born costing £80.74.
• Petrol averaged £1.46 per litre giving a saving/return of £144.71 this month.

My daughter has been using the CUPRA Born to commute to London a lot. This has meant we sometime have to charge it during the 'day rate' on the Octopus Flux tariff tariff.

Electricity

• Our historical baseline electricity usage for February is 433kWh, an average of 14.9kWh per day.
• We imported 365kWh for home use, with a low of 6.9kWh, a high of 26.2kWh and an average of 15.9kWh. This is a 8.6% reduction on our historical usage and cost £94.08, a saving of £71.50.
• Our home usage was 521kWh (low of 9.7kWh, high of 18.5kWh, average 13.4kWh).
• We generated 341kWh (low 1.5kWh, high 27.0kWh, average 11.8kWh). This is quite a bit lower than the 426kWh from February 2023.
• We exported 193kWh, (low 0.0kWh, high 20.0kWh, average 6.7kWh).
• We earnt £33.43 exporting solar energy (low £0.00, high £3.67, average £1.23).
• The Monthly Generation Factor is 341kWh ÷ 6.63kW = 51.5.

Gas

As expected, our gas savings this month were much lower. This is simply because we are paying almost half the kWh rate on the Octopus Tracker (December 2023 v1) tariff that we were paying on the variable rate tariff.

• Our historical baseline gas usage for February is 2041kWh, an average of 72.0kWh per day.
• We used 1553kWh this month (low of 38.5kWh, high 82.5kWh, average 53.4kWh).
• This is a reduction of 23.2% on our baseline and a saving/return of £18.01.

Transport

The average rate has increased to 3.9p per mile as we have had to charge the CUPRA Born during a the day rate on several occasions.

• We have driven a total of 17,069 miles in our CUPRA Born and spent £740 on electricity to charge it.
• We are mostly charging our CUPRA Born over night on the Octopus Flux tariff Flux rate (16.76p/kWh), to export as much solar energy as possible.
• We have driven 1426 miles and put 467kWh into our CUPRA Born costing £91.40.
• Petrol averaged £1.45 per litre giving a saving/return of £126.46 this month.

From the 1^st January 2024 the Octopus Flux tariff rates are:

Electricity

• Our historical baseline electricity usage for January is 528kWh, an average of 17.0kWh per day.
• We imported 493kWh for home use, with a low of 6.9kWh, a high of 26.2kWh and an average of 15.9kWh. This is a 8.6% reduction on our historical usage and cost £94.08, a saving of £71.50.
• Our home usage was 521kWh (low of 9.7kWh, high of 18.5kWh, average 13.4kWh).
• We generated 332kWh (low 0.6kWh, high 26.2kWh, average 10.7kWh).
• We exported 184kWh, (low 0.0kWh, high 19.1kWh, average 5.9kWh).
• We earnt £33.43 exporting solar energy (low £0.00, high £3.49, average £1.08).
• The Monthly Generation Factor is 332kWh ÷ 6.63kW = 50.0.

Gas

• Our historical baseline gas usage for January is 3088kWh, an average of 99.6kWh per day.
• We used 2510kWh this month (low of 0.0kWh, high 118.8kWh, average 88.9kWh).
• This is a reduction of 18.7% on our baseline and a saving/return of £42.69.

Transport

• We have driven a total of 17,069 miles in our CUPRA Born and spent £649 (3.7p/mile) on electricity to charge it.
• We are mostly charging our CUPRA Born over night on the Octopus Flux tariff Flux rate (16.76p/kWh), to export as much solar energy as possible.
• We have driven 1016 miles and put 338kWh into our CUPRA Born costing £59.30.
• Petrol averaged £1.45 per litre giving a saving/return of £99.78 this month.