August Solar Generation and Export Numbers
Here is the overview for August 2024. Octopus Agile prices were amazingly low. This led to our biggest profit as you will see below. This was due to a lot of plunge pricing which allowed us to force discharge battery and get paid to re-charge it. This was the first month with the heat pump. At the moment, no need for central heating, it is just doing the hot water.
Octopus had some API issues near the end of the month. This had led to some missing data. Hopefully the data will be populated soon and I can update this post.
The worst generation day was the 24th with only 6.30 kWh. The best was the 9th when 24.00 kWh was generated.
The best export day was the 9th with 25.90 kWh. This was mainly battery discharging with a bit of solar.
Rather than show an export profit, I thought it would be easier to show the cheapest day.
As solar panels output declines over the years I have added the 2023 August generation to the table at the bottom. Of course weather comes into it as well, but I thought it would be interesting to track.
So far this year we have had 152 days where we generated more solar than we consumed, and 105 days more solar was generated than we imported from the grid.
August 2024 Octopus Energy bill
Octopus Watch Tariff Comparison Report. This does not include exporting
Best Solar Generation
| Date | kWh | |
|---|---|---|
| Generation | 26th May 2023 | 32.90 |
| Front generation | 14th June 2023 | 19.80 |
| Back generation | 7th June 2023 | 14.70 |
| Worst generation | 12th December 2022 | 0.20 |
Solar Generation August 2024
| Date | kWh | |
|---|---|---|
| Best generation | 9th | 24.00 |
| Best front generation | 25th | 15.30 |
| Best back generation | 9th | 11.20 |
| Worst generation | 24th | 6.30 |
| Worst front generation | 24th | 2.70 |
| Worst back generation | 31st | 3.40 |
Best Solar Export and Profit
| Date | kWh | Profit | |
|---|---|---|---|
| Exported kWh | 9th August 2024 | 25.90 | |
| Exported profit | 9th August 2024 | 25.90 | £3.89 (15p kWh) |
| Profit day | 9th August 2024 | 25.90 | £3.48 |
Solar/Battery Export and Profit August 2024
| Date | kWh | Income/Cost | |
|---|---|---|---|
| Best kWh export | 9th | 25.90 | |
| Best export profit | 9th | 25.90 | £3.89 (15p kWh) |
| Cheapest Day | 9th | -£3.48 |
The graphs below is the total generation for August compared to the rest of the year.
2024 generation graph. January to August
Generation
Overview for August
The graph below shows the generation for each day
Graph showing production for the month
The graphs below show the generation split between the front and back panels
Graph showing production for the front facing panels
Graph showing production for the back facing panels
The graphs below show the yearly generation split across both the back and front panels
Front panel generation for January to August 2024
Back panel generation for January to August 2024
Octopus Agile
The costs shown here do include the standing charge. Any comparisons are compared to the unit cost if we were not on Octopus Agile, which is 0.23084p per kWh. The standing charge was 0.4211p
July Grid Information
| Standard Tariff | 23.084p | ||
| Standing Charge | 42.11p | ||
| Cost from the grid | £20.57 (Agile) | £58.06 (Standard) | |
| Savings including export | £66.62 | ||
| Exported | 194.20 kWh | £29.30 @ 15p kWh | |
| Agile slots used | API issue | ||
| Agile plunge slots used | API issue | ||
| Average Agile slot price | 8.18p | ||
| Cheapest slot | API issue | ||
| Most expensive slot | API Issue | ||
| House consumed | 582.30 kWh | ||
| Solar generated 2024/2023 | 559.40 kWh | 560.40 kWh | |
| Percentage generated by solar | 96% | ||
| Self Sustained Days 2024 (More solar than consumed) | 105 | ||
| Self Sustained Days 2024 (More solar than we imported) | 152 | ||
Here is the Octopus Watch report summary. This was also effected by the API issue.
Octopus Watch summary
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The best and worst solar power generation days