Twice a year, clocks in Portugal are adjusted: one hour forward in spring, one hour back in autumn. The original goal was simple — to make better use of daylight and reduce energy consumption.
But now that solar energy has become one of the main renewable sources, does this time change still make sense?
The Origin of Daylight Saving Time
Daylight saving time was introduced during World War I and later adopted by several European countries to maximize the use of natural light and save electricity.
At a time when artificial lighting represented a significant portion of energy consumption, the measure made perfect sense.
Today, however, the situation is quite different. The energy impact is no longer the same!
With advances in technology, more efficient heating and cooling systems, and the widespread adoption of photovoltaic solar energy, the energy savings from changing the clock have become minimal.
Modern buildings are more efficient, and many homes and businesses already generate their own electricity through solar panels, taking advantage of sunlight all year round, regardless of the official time.
Solar Energy: The Natural Clock of the Future
Solar energy doesn’t depend on the clock — it depends on the sun.
By investing in solar panels, you align your energy use with the natural cycle of light, without relying on artificial measures like daylight saving time.
Moreover, with solar battery storage systems, it’s possible to use the energy produced during the day even at night, ensuring autonomy and energy efficiency in every season.
So, Does It Still Make Sense to Change the Time?
More and more experts and consumers are questioning this practice.
In the age of solar energy, the focus should be on real energy optimization, decentralized clean energy production, and carbon reduction — not just clock changes.
Investing in solar energy means gaining autonomy and efficiency at any hour of the day.
At Roteiro do Saber, we believe the energy future is built with the sun, not the clock.
Our solar systems and sustainable climate solutions help families and businesses reduce costs, gain energy independence, and contribute to a more balanced planet — any time of year.
Contact us to find the best solution for your home or business.
