Alex Mestres, A Personal Finance PromoterExplains how you can reduce electricity costs in three tips. His TikTok video describes savings of up to 40% on electricity bills, without explaining how he arrived at that percentage in the video description posted on November 22, 2024, which begins with the question “What can I do to save up to 40% on my electricity bill?”.
In the first recommendation, the microwaveMistress talks about prioritizing its use over the stove. “Heating or cooking with a microwave saves 60% to 70% energy compared to an oven”The video indicates the details.
The other two tips are about televisions and chargers. Mistress recommends disabling the television’s standby mode because “Even though it doesn’t seem like it, this mode costs more than we think”. “Turn TV off completely to save up to 15%”.
Regarding the third tipMistress asks visitors to disconnect chargers from devices when they are not in use because “When you leave them plugged in, they continue to use energy”.
What the IDAE Guide Says
The 60-70% savings mentioned by Mestres correspond to the Practical Energy Guidelines (Third Edition of 2010). Institute for Energy Diversification and Saving (IDAE)Which means using a microwave instead of a conventional oven “60 to 70% energy savings and substantial time savings”.
IDAE also lists In this order efficient preparation method: Microwave, Pressure Cooker and finally Oven. For example, a small Class D electric oven will consume 1 kWh each time it is used. If the savings recommended by IDAE are used, the microwave will consume between 0.3 and 0.4 kWh each time it is used.


Of course, they are not the same dish or the same vessel.. Television in standby mode, 15% also corresponds to what IDAE’s guide includes: a television in standby mode “Can consume up to 15% under normal operating conditions”. Now it is a different regime that conducts its activities. Different features of the television, depending on whether certain functions are used, will react differently. Values are not directly comparable with smaller ovens.
European limits for TVs and chargers
From March 1, 2021, an eco-design regulation for display screens applies. This regulation specifies the limits of absorbed energy both in ready (standby) mode and in network ready mode as a requirement; For example, consumption of 0.50 watts or 2.20 watts when using standby mode or more functions.
Network standby mode cannot exceed a base power consumption of 2 watts; With additional functions, this figure can reach a maximum of 7.7 watts if all of them are activated, with high network availability.
A television that spends the whole year in standby mode with 0.5 watts consumes about 4.4 kWh. From this it can be inferred that the most important thing to take into account is the settings. So, this Environmental Design Regulations Now the network ready mode should be disabled in the factory settings of the smart TV The television must ask the user for confirmation before the remote-control feature is activated, and the user “will be able to disable it.”

Similarly, for the use of chargers, from April 1, 2020, a European regulation on external power supplies applies: power adapters that supply direct current to devices via a plug.
Your Annex II It is stated that a plug-in power consumption of DC adapters with a rated output power of up to 49W should not exceed 0.10W when no device is powering (the technical term is “idle operation”), which would equate to less than 1 kWh per year.
Mistress’ advice about the charger is, therefore, valid, although, at least, the electrical consumption it consumes practically makes for a ridiculous savings on the electricity bill.

How to check your own expenses
May be the most valuable thing Compare the hours of each practice with your own expenses. Datadis, the common platform for distributors, lets you explore hourly, daily, etc. costs of deliveries.
If you download or monitor this data, you can see if the hours when the electric oven is used correspond to peak consumption times. In a previous article, in February 2020, we explained how readers can consult their electricity distributor’s website, as it then shows their instantaneous consumption (or energy).
Picture | TikTok with editing