July’s Solar Generation and Export Numbers
Here is the overview for July 2023. The weather in the UK in July was the 6th wettest on record. This was reflected in the numbers. It was not nearly as good as it should have been. We did not get paid for any export until the 25th when we got our tariff restored
Below you can see how the generation was improving month by month over the year. July was only slightly better than April
2023 generation graph. January to July
July also had some very good plunge pricing. On some days we did charge from the grid as we were being paid to use electricity. That made up for some of the missing export profit we could have made
The worst generation day was the 14th with only 6.5 kWh and the best was the 7th when 30.7 kWh was generated.
The best export day was the 7th with 14.7 kWh
The graph below is the total generation for July. Some of the battery came from the Octopus Agile overnight charging. More on that at the bottom of this post.
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
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 30.09p per kWh. This is the new unit cost after the price cap took affect
For the month of July the average unit cost Octopus Agile Import was 11.39p. The average unit cost Octopus Agile Export was 7.93p
Our best export day by cost was the 26th with £0.97. The average Agile export rate for that day was 9.92p kWh
Our electricity cost from the grid for July was £19.41 compared to £35.98 on the standard tariff, this is a saving of £19.53 comparing Agile to the standard tariff once the export is also added
The solar generated £182.28 using the standard unit rate of 30.9p per kWh
In total we exported 192.50 kWh and made £2.96. This was due to the fact we only got paid for the last six days of the month
This month we used 4 half hour slots. The average cost of the overnight slots used was 1p per kWh. The cheapest slot was 1.811p per kWh the most expensive slot was 1.959p per kWh. These are the price slots were used, not the best slots. There were cheaper slots, but we didn’t need them on those days
The percentage of our electricity generated by the solar panels for July was 132%. We generated 589.9 kWh compared to the house consumption of 447.1 kWh. Some of that house consumption includes the Solar iBoost. That used 10.21 kWh of the solar we produced
The best profit day was 29th. We made 33p. Import cost was 47p, the export was £0.80
Here is the Octopus Watch report summary
Octopus Watch summary
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The best and worst solar power generation days