Hi I have just switched electricity suppliers to Octopus Energy who I think are maybe one of the first to have variable half hour rates in the UK depending on wholesale price. Naturally I want to make some switching decisions based on future electricity cost. There is an example curl statement tha…

[image] Andrei: Probably it is possible some optimization in the flow but it is too early to think about that. Before you should imagine a strategy to trigger the MQTT message to control the devices I like the idea of using schedex which I use on other applications. At the moment I run manual…

What I do is every time I get new data, I run calculations to create additional total price for all data with all the taxes included. As grid network fee is not constant it makes significant difference. Different prices for night hours and for weekends makes cost saving a little bit challenge to do …

I have the above two flows working and have started linking into Homeseer using MQTT to control EV charger and appliances based on lowest electricity price. A couple of questions on best way to extend the above flows- particularly the flow in post 6:- I can work out how many half hour slots I ne…

Hello @chrisgla . Welcome to the forum. Both changes can be easily done. #1 There is no need to use context (although it would work nicely). The easiest way to generate a reply with a variable number of slots is to inject the amount of slots required as a property of the original message. Later on …

Thank you @Andrei . The first change worked well, the second I never thought through fully and would be very messy to interface with (Homeseer) . It seems a better way would be for Node Red to send a "Start Charging" message at the times in the array and start a 30 minute timer, then send a "Stop C…

A little example how hourly (or half hour) price information can be turned into daily on/off schedule. NB! This is not ready to use solution, just a little something to start from. Or start to generate ideas from... [{"id":"cf605fd3.ce51","type":"function","z":"eab6da64.c00bf8","name":"generate so…

Thanks @hotNipi - it'll take me a bit of time to work through this- not written code for many years. I now have the Tesla and Modbus charger interfaces so moving closer- not bad for a week with Node Red! A small thing I meant to point out for others is you don't need API key for this application- o…

Been following this closely and built on it to suit my own particular needs, a couple of things to sort out, but BIG BIG thanks to you all for contributing. It has made my job a lot easier and I have learnt loads, even got the costs per kWh for each combined slot. (Always loved hated Array manipul…

[image] mudwalker: Would have liked something like 23 minutes (Inject node only does 15 minute slots) You might want to try the cron-plus node for more flexibility.

Thanks Julian, I will take a look. Still expanding my knowledge!!

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Best strategy for Reading & Sorting Electricity Cost Array

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Mheel80 14 October 2021 06:33 32

Looks great. Can you share your node red flow?

Electricity buy/sell logic

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Best strategy for Reading & Sorting Electricity Cost Array

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