this post was submitted on 19 Nov 2023
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Home Automation
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Home automation is the residential extension of building automation.
It is automation of the home, housework or household activity.
Home automation may include centralized control of lighting, HVAC (heating, ventilation and air conditioning), appliances, security locks of gates and doors and other systems, to provide improved convenience, comfort, energy efficiency and security.
Warning: Working with electricity can result in injury, property damage, or even death if it is not done properly. Please keep this in mind while assisting others. If you are not sure about what you are doing, hire a licensed professional.
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What’s the difference between this and using a time of use plan and having the light adjust based upon time of day? Is there a significant difference in cost savings to warrant the extra programming? How frequent does the light change color and what thresholds do you have for them being cheap, natural, and expensive? Great idea! Im genuinely curious!
First of all, it's fun to play with this, even when there is no significant benefit.
Second, there are significant differences sometimes. The hourly price depends on supply and demand - factory consumption, weather (wind/water), power plant maintenance, etc.
Although usually "day expensive, night cheap" is good enough, there are peaks. Sometimes during the daytime, the price can be negative, or it can be 60 cents/kWh. At those times you might want to avoid using sauna for example.
You can see the prices here: https://www.nordpoolgroup.com/en/Market-data1/Dayahead/Area-Prices/ALL1/Hourly/?view=chart
Personally, my subscription is a hybrid. It's a fixed fee ± difference of the current price to the rolling average. So I actually calculate the average to the current price with a tolerance of ± 5 cents. In the chart below you can see the red line, which is the trigger for the red light (11.16). Green would trigger at 1.16. The yellow line at the bottom is the average, at 6.16.
https://preview.redd.it/hkfydks32g1c1.png?width=509&format=png&auto=webp&s=d8644497b807344573866b3b2a6e771ef9447666
Tomorrow afternoon the energy peaks near 100 cent/kWh because of a broken nuclear plant.
https://preview.redd.it/zjalxr3vgk1c1.png?width=502&format=png&auto=webp&s=a319efb3d0e3fc8963b930c9592151548c36e6c9