Follow the project on Github: Smart Heatpumps HA
Hi everyone, i have a 4,14kWp solar photovoltaic system which i want to exploit as much as i can to save money, especially during winter months reducing the amount of gas i need to buy and so saving money.
I have 5 Daikin splits with air conditioning and heat pumps, the idea is to use them when i have enough production to run them “free” or buying as much as i usually buy (~ 450W) from the grid, instead of using my aluminium radiators.
I searched for a long time for something like this online but i did not find anything (apart from Homsai Engine, which is still a beta and seems not to work so well, at least by now november 2022) so i decided to try to write some automations to try to do something by me that could work.
I will update the github page (link above) with the code and the ideas behind any changes to the code, so feel free to have a look and use the “discussion” page there, but i will also update this thread to help me solve the problems i will encounter and to create a base also here on the forum for anyone who will be interested in something like what i’m trying to do.
By now i made a simple automation that checks when the meter reading is less than -350W for 15 minutes and the temperature in the room is < 19°C it starts the heatpump at 19°C and in eco mode.
The first problem i encountered is: with this setup if i have like 4 rooms under 19°C it starts 4 splits at the same time, the consumptions jump to like 2000W and it needs to be stopped… how can i solve this in a smart way? Also considering that 3 splits are connected to one motor, the other 2 to a second one, so it will be smarter to let run multiple splits prioritizing the splits on the same motor to reduce consumptions.
Is there a way to start first the split in the room with the lowest temperature?