July Solar Generation and Export Numbers
Here is the overview for Juy 2024. Octopus Agile was very stable in July and not in a good way. Not that we should complain, it is still way cheaper than the price cap. It hovered around 15p kWh overnight for most of July. There was one plunge price day. July was once again rainy in the UK and didn’t feel like summer. I was surprised to find out we generated more than last year.
We had the heat pump installed the week of the 22nd. This meant some a few days the water was heated by the immersion. Obviously we don’t have the heating on at the moment. The heat pump isn’t really impacting the cost. We heat overnight from 2am to 4am. In reality it takes 15 minutes to heat the water from 45c to 48c. The heat pump is set to keep the hot water temperature at 45c if it falls below that. We also do a top up at 12pm. The Solar iBoost was also removed.
The worst generation day was the 25th with only 8.50 kWh. The best was the 28th when 28.70 kWh was generated.
The best export day was the 3rd with 15.50 kWh. This was all solar, not forced export.
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 May 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 128 days where we generated more solar than we consumed, and 90 days more solar was generated than we imported from the grid.
May 2024 Octopus Energy bill
Octopus Energy bill for July 2024
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 July 2024
| Date | kWh | |
|---|---|---|
| Best generation | 28th | 28.70 |
| Best front generation | 28th | 18.60 |
| Best back generation | 21st | 11.60 |
| Worst generation | 25th | 8.50 |
| Worst front generation | 25th | 4.50 |
| Worst back generation | 25th | 4.00 |
Best Solar Export and Profit
| Date | kWh | Profit | |
|---|---|---|---|
| Exported kWh | 15th June 2024 | 22.20 | |
| Exported profit | 15th June 2024 | 22.20 | £3.15 (15p kWh) |
| Profit day | 14th April 2024 | 18.20 | £2.67 |
Solar/Battery Export and Profit July 2024
| Date | kWh | Income/Cost | |
|---|---|---|---|
| Best kWh export | 3rd | 15.50 | |
| Best export profit | 3rd | 15.50 | £2.33 (15p kWh) |
| Cheapest Day | 3rd | -£2.33 |
The graphs below is the total generation for July compared to the rest of the year.
2024 generation graph. January to July
Generation
Overview for July
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 July 2024
Back panel generation for January to July 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. This is the new unit cost after the price cap took affect. The standing charge was 0.4211p
As mentioned above we are still using overnight slots due to my new export strategy. The average slot price was quite high this month.
July Grid Information
| Standard Tariff | 23.084p | ||
| Standing Charge | 42.11p | ||
| Cost from the grid | £24.66 (Agile) | £54.96 (Standard) | |
| Savings including export | £72.05 | ||
| Exported | 278.30 kWh | £41.75 @ 15p kWh | |
| Agile slots used | 100 | ||
| Agile plunge slots used | 15 | ||
| Average Agile slot price | 10.36p | ||
| Cheapest slot | -3.97p | ||
| Most expensive slot | 16.012p | ||
| House consumed | 538.50 kWh | ||
| Solar generated 2024/2023 | 632.60 kWh | 589.90 kWh | |
| Percentage generated by solar | 117% | ||
| Self Sustained Days 2024 (More solar than consumed) | 90 | ||
| Self Sustained Days 2024 (More solar than we imported) | 128 | ||
Here is the Octopus Watch report summary
Octopus Watch summary
Featured posts
The best and worst solar power generation days