Hey everyone,
I’m trying to integrate my Daikin Altherma air-to-water heat pump (specifically the Domestic Hot Water (DHW) tank) with Home Assistant to optimize the use of excess solar energy. I’m using the ONECTA Cloud API to control the system.
My goal is to increase the desired temperature of the DHW tank when my solar panels produce excess energy, essentially using the tank as a thermal battery. However, I’ve run into a couple of limitations:
1. The API doesn’t allow programmatic control of the DHW tank’s desired temperature.
This is also not possible via this integration GitHub - jwillemsen/daikin_onecta: Home Assistant Integration for devices supported by the Daikin Onecta App
2. There is only one possible schedule configuration for the tank, which isn’t flexible enough for my needs.
While I can switch the boost mode on or off via the API, boost mode consumes too much energy at once, which doesn’t align with my goal of gradual, efficient energy use.
Has anyone figured out a workaround to control the DHW temperature, or set up more flexible scheduling based on solar production? Any tips or experiences on how to better manage this with Home Assistant or extend the API capabilities would be much appreciated.
Thanks in advance!