If you prefer to always view the website in English, please click here.
World Energy Efficiency Day: 15 real measures to reduce your electricity bill in 2026
5 March marks World Energy Efficiency Day, a date that invites us to take a close look at how we consume energy at home. Because being efficient is not just an environmental issue: in 2026, with increasingly electrified homes and a dynamic energy market, it is also a smart way to save.
In this article, we review what this day means and, above all, 15 practical and realistic measures you can apply today to reduce your electricity bill without sacrificing comfort.
Why we celebrate World Energy Efficiency Day (5 March)
Origin and goal of this global celebration
World Energy Efficiency Day has been commemorated every 5 March since 1998, when an international conference held in Austria highlighted the need to promote a more rational and sustainable use of energy.
The goal is clear: to raise awareness among citizens, businesses, and public administrations about the importance of consuming better, reducing emissions, and using resources smartly.
Why it is more relevant than ever in 2026
In 2026, talking about energy efficiency means talking about savings, energy independence, and the transition towards a more sustainable model. The electrification of homes, electric mobility, and new climate control systems mean that every consumption decision carries more weight on your bill.
Impact of energy consumption in Spanish homes
Domestic consumption accounts for a significant part of the national energy demand, especially in winter and summer, when heating and air conditioning cause energy use to skyrocket. Optimising this consumption not only reduces individual expenses but also contributes to a more balanced system.
Why we need to talk about energy efficiency in 2026
Fluctuations in the electricity market: volatility
The electricity market continues to show periods of higher and lower prices depending on supply, demand, and the international context. This volatility makes managing when and how we consume key to paying less. Choosing between different electricity tariffs can help you adapt better to your usage habits.
Impact of the climate, gas prices, and demand
Cold snaps and heatwaves increase electricity demand. Furthermore, factors such as gas prices or renewable generation directly influence the cost of electricity. The climate and the global energy context affect our bills more than it seems.
Regulatory changes and new efficiency grants
In recent years, grants have been promoted for energy retrofitting, self-consumption, and facility improvements. Knowing about these opportunities can facilitate investments that translate into medium and long-term savings, especially if you are considering installing solar PV for self-consumption in your home.
More electrified homes: heating, electric cars, and smart home technology
More and more homes are incorporating heat pumps, air source heat pumps, solar panels, electric car chargers, or smart home systems. This increases total electricity consumption, but it also opens the door to much more efficient and intelligent management – for example, by installing an electric vehicle charging point at home.
15 real measures to reduce your electricity bill in 2026
1. Turn the heating down by 1°C or the air conditioning up by 1°C
A small adjustment can reduce your climate control consumption by between 5% and 10% without losing comfort.
2. Use appliances during off-peak hours
Scheduling washing machines or dishwashers during the cheapest time bands helps optimise the cost per kWh.
3. Track your usage with a smart meter
Seeing how much you consume in real time allows you to spot excess usage and habits that can be improved.
4. Adjust your contracted power
Having more power than you need increases the fixed charge. Reviewing it can lead to stable savings every month.
5. Check and bleed your radiators
An efficient heating system distributes heat better and requires less energy.
6. Optimise the use of your electric water heater
Setting the temperature to 50–55°C and avoiding having it running all day reduces consumption.
7. Draught-proof windows and doors
Improving insulation prevents heat loss in winter and keeps your home cool in summer.
8. Use high-efficiency LED bulbs
They consume up to 80% less than traditional bulbs and last much longer.
9. Install smart power strips to avoid vampire draw
They consume up to 80% less than traditional strips and last much longer.
10. Wash on a cold setting and use ECO programmes
Reducing the wash temperature significantly lowers electricity consumption.
11. Maintain your fridge properly
Setting it to 4–6°C and avoiding opening it unnecessarily improves its performance.
12. Make the most of natural light
Rearranging spaces and schedules to use less artificial lighting is a simple and effective step.
13. Review your contracted tariff
Adapting your tariff to your actual habits can make a significant difference to your annual total. Options like Conecta Luz can help you gain stability on your bill.
14. Consider an air source heat pump if your home allows it
It is an efficient solution for climate control and hot water, with lower consumption compared to traditional systems.
15. Install solar PV for self-consumption (if viable)
Generating your own energy reduces grid dependence and protects you against future price hikes. If you want to optimise surplus compensation, you can look into Endesa Solar Plus.
How much you can save by applying these measures
Immediate savings (free measures)
Small everyday habits, such as better temperature regulation, choosing ECO programmes, or unplugging devices on standby, can make a difference and lead to notable annual savings, depending on each household's usage.
Medium-term savings (maintenance + tariff)
Adjusting your contracted power, choosing a tariff that fits your habits, and improving your home's insulation are decisions whose results may not be noticeable in a single month, but they do generate consistent savings reflected in every bill.
Structural savings (self-consumption / air source heat pumps)
Investing in self-consumption or highly efficient systems can result in significant reductions on your annual bill and greater stability against market volatility.
How to know which measures suit your home
Homes with electric heating
Here, the greatest potential for savings lies in climate control, insulation, and power control.
Homes with natural gas
The optimisation of electricity usage is focused more on appliances, lighting, and your tariff.
Small flats vs family homes
In small flats, the impact comes from daily habits; in family homes, climate control and hot water carry more weight.
With an electric car (night charging = key savings)
Scheduling charging during off-peak hours and adjusting your contracted power is essential to avoid extra costs.
Save energy in your home with Don't forget that, as an Endesa customer, you can access InfoEnergía, the free tool that analyses your consumption and offers personalised advice on how to save energy. In just a few minutes, you can see how you use energy in your home, discover opportunities for improvement and receive recommendations tailored to your home and habits. A simple and practical way to understand your bill, optimise your consumption and reduce your energy expenditure without sacrificing comfort.
"Using energy responsibly and sustainably saves you a few euros. And adds years to the life of the planet."
Take a minute to find the product that best suits you:
{{firstStep.title}}
Take a minute to find the product that best suits you:
{{title}}
{{content.phone.title}}
{{content.phone.text}}
{{content.phone.phoneText}}
{{content.form.title}}
{{content.form.text}}
{{content.form.success.title}}
You don't need to adapt to Endesa's tariffs because they adapt to you. If you go to our catalogue you can compare the different tariffs for yourself. Or if you prefer, you can answer a few questions and we will take care of comparing all the different electricity and gas tariffs and then make a customised recommendation.
Take a minute to find the product that best suits you:
{{title}}
{{content.phone.title}}
{{content.phone.text}}
{{content.phone.phoneText}}
{{content.form.title}}
{{content.form.text}}
{{content.form.success.title}}
You don't need to adapt to Endesa's tariffs because they adapt to you. If you go to our catalogue you can compare the different tariffs for yourself. Or if you prefer, you can answer a few questions and we will take care of comparing all the different electricity and gas tariffs and then make a customised recommendation.
Comparison of Electricity and Gas Tariffs
You don't need to adapt to Endesa's tariffs because they adapt to you. If you go to our catalogue you can compare the different tariffs for yourself. Or if you prefer, you can answer a few questions and we will take care of comparing all the different electricity and gas tariffs and then make a customised recommendation.
Do you want to see all our offers?
Spend a minute to find the product which best adapts to you:
{{firstStep.title}}
Spend a minute to find the product which best adapts to you:
{{title}}
Spend a minute to find the product which best adapts to you: