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The goal of this project is to simplify the timer setup of my devices and optimize the energy cost related to an action. It all comes down to two informations.
- the price of energy (price per kWh)
- the energy consumption profile of a device action.
The first I can read from tibber for ~24 hours ahead. For the second information I did measure the energy consumption of my devices during an action (i.e. washing at 40°C). I did measure the consumption in a 10 minute raster, meaning i took the sum for the last 10 minutes as value. (A smaller raster will make the calcualtion more accurate).
To calculate the to be expected costs I take these consumption profiles and put them on top of the price table reported by tibber. The result is a recommendation on what number to setup the timer to do the action when it's cheapest.
All my devices come with a "timer" in hours, esp these are "done" timers, meaning the action will be done when the timer is at zero. In those cases there is a third value required - the time the action does take.
Here are some images of my prototype print. (The case is in the repository)
This page tells the user the current price of 1kWh
This page tells the user the current price of washing with 40°C - the cheapest and highest within the next hours
This page shows an overview diagram of what an action will cost (and how the price does change within the next known hours) So you can see a trend if the cheapest time is to early / to late but the current price is considered to high.
