ᐅ Energy management systems and control of washing machines, dryers, and the property

Created on: 27 Jan 2022 13:18
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HoisleBauer22
My question is: How do you control or switch on your washing machine, dryer, or dishwasher when you want to specifically use energy from your photovoltaic system? What control or energy management systems are available for this? What interfaces do the common appliance manufacturers use?
Is a battery absolutely necessary? It is said that such storage might not be economically worthwhile...

This is a continuation of this post: https://www.hausbau-forum.de/threads/wenn-nochmal-bauen-was-anders-machen.42145/post-553913

Apparently, Siemens offers something called "Home Connect".
Araknis30 Jan 2022 11:07
Saving money with automation really only works (almost) exclusively in commercial buildings. At home, it is more about comfort, security, and enjoying the technology. You just shouldn’t expect too much.
Mycraft30 Jan 2022 11:50
On the other hand, there is, of course, the general concept of household appliances.

Every washing machine, refrigerator, dishwasher, etc., is automation at its best (pumps running, motors turning), and for individuals, the primary focus is certainly on convenience. However, the time saved by these devices, which allows one to focus on other tasks or responsibilities, is literally worth money.

And if the appliance even becomes proactive on its own, why not.
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borxx
31 Jan 2022 23:16
Automation is relative...
The house knows when occupants are present or absent and can detect when everyone is asleep, turning off the network/Wi-Fi, standby devices, and similar systems in unused floors. The few watts used continuously add up, especially considering that many people are not home for 8-10 hours and sleep for another 7-8 hours. Ventilation based on air quality, for example, would then be regular house systems and not just white goods technology.

For dishwashers and washing machines, one might debate whether it’s worth it for under 100 kWh (108,000 BTU) for the dishwasher. On the other hand, if it doesn’t bother you that the dishwasher runs at midday in summer when the sun is out, that’s great. If you know you come home from work at 4 p.m., you can load the washer in the evening beforehand, have it run starting at noon, and it’ll be finished when you get home. You can then use the late afternoon sun to run the dryer and load the next batch for the following midday. Sometimes a switching channel costs 10 or several dollars, or a protocol exists that can be accessed via network or other protocols, so the only expense is setup (ranging from a few minutes DIY to expensive technician visits). Overall, it’s very individual, depending on personal and technical factors and whether you want to commit, considering the limitation that after a vacation you can’t wash five loads back to back.

In summer, preparing hot water at midday can often be arranged simply through timed restrictions or by using more advanced logic to shift it to genuine surplus power. In winter, timing doesn’t matter much anyway, as there is usually too little output from the solar panels to worry about distributing it.

Nowadays, there are refrigerators with a vacation mode that adjusts cooling performance. In most households, it’s probably still door open, button pressed, or like how parents used to just turn the fridge a few degrees warmer during holidays. If this is smart and automated—not necessarily meaning app-based as many think—this regulation can be sensible or clever. Whether it effectively saves money and/or energy is up to each person to decide. 😉

Many systems won’t pay for themselves, but if they are already installed (e.g., photovoltaic and smart home systems), why not use and combine them to their full potential?