Hi UK Energy Customers.
You will find the plugin published in the plugin store http://www.indigodomo.com/pluginstore/232/ with the documentation at https://github.com/neilkplugins/Octopus_Energy-indigo-plugin/wiki
You do not need to switch electricity suppliers to make use of the plugin, if you are curious to see what "plunge pricing" could look like for your location then you can simply use it to see at any given point in time what "Time of Use" electricity rate could apply. In these strange times of lockdown, we have seen the longest periods of "negative energy pricing" when you are paid to consume electricity as the grid has surplus capacity. Minimal industrial demand couple with a long period of sunny and windy weather has actually resulted in a surplus of renewables (wind farms needed to be switched off). You could theoretically store energy in your power wall, and sell it back if you have a feed in tariff when the rates are high (or consume energy from your store during the evening peak).
Please let me know of any problems, feedback or feature requests. Consumption (for both Gas and Electricity) will come in future versions as well as the ability to show your actual costs from the previous day as soon as I can switch.
Thanks,
Neil