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Types of renewable energies

What are renewable energies?

Every day, there is more talk about renewable energies and how their use is key to ensuring the future of our planet. In this post, we are going to explain what is meant by renewable energy, its types and characteristics.

Sun, wind and water are the three elements that come to mind when we deal with the topic of renewable energy. However, the term is much broader and encompasses much more. What we are clear about is that they are the most sustainable alternative to those from fossil sources, such as coal and oil and their derivatives. And they are also inexhaustible, unlike the latter.

What are renewable energies?

To begin with, we are going to define what are renewable energy. They are those energy sources based on the use of natural resources: the sun, wind, water or plant or animal biomass. They are characterized by not using fossil fuels, but natural resources capable of unlimited renewal.

One of their strengths is that they have a very low environmental impact, because in addition to not using finite resources, they do not generate pollutants.

Renewable energies are also known as alternative energies or green energies.

What characteristics do renewable energies have?

Let’s list them:

They help to promote self-consumption

The use of renewable energies contributes to making houses much more self-sufficient in their electricity consumption. In the not too distant future, all constructed buildings will have to have their own solar panels, biomass boilers or charging points for the electric car in their community garage; self-consumption of electricity is much easier to achieve than we imagine. You can expand the information on electricity self-consumption by visiting this page, or also by taking a look at our article on solar panels.

They are beneficial energies for the environment

We are constantly fighting against climate change and looking for new ways to take care of our environment and make it more sustainable. A very important step is the use of renewable energies or alternatives to traditional energies. These damage the environment through the waste they generate and that come from their own production.

They are free and inexhaustible natural resources

Renewable energies come from free and inexhaustible natural resources. We will always have water, wind or sun with which to produce clean energy. On the other hand, the energy generated from fossil fuels (coal, oil or gas) has limited resources and is polluting for the environment.

Renewable energies can reach isolated places

Renewable energies, by generating energy through natural sources, can be found anywhere in the world; with which, any corner of the world can generate its own energy and be self-sufficient.

The use of renewable energies is a plus to achieve energy independence

It is known to all that Spain is not a country where fossil fuels such as coal or oil and their derivatives, gas, abound; but it is very rich in natural resources necessary to generate clean energy that help reduce CO2 emissions and climate change.

Faced with this paradigm, now more than ever we must use renewable energy to increase our energy independence, and not have to buy it from other countries that are also dirty energies that pollute.

What types of renewable energies exist?

There are different types of renewable energy. We start from the basis that we can obtain energy in many ways, we just have to transform it, in this case, into electrical energy. In nature we can find a variety of inexhaustible sources from which to extract energy. Next, we list the different types of renewable energies that exist:

Solar energy

Solar energy is that which we obtain from the sun. Through solar panels, solar radiation is absorbed and transformed into electricity that can be stored or fed into the electricity grid. There is also thermoelectric solar energy, which is one that uses solar radiation to heat a fluid (which can be water), until it generates steam, and drives a turbine that generates electricity. You can expand the information on solar energy in this post.

Wind power

In the case of wind energy, the generation of electricity is carried out with the force of the wind. The windmills that are in the wind farms are connected to electricity generators that transform into electrical energy the wind turns their blades. We also have an article where we expand the information on wind energy.

Hydraulic energy

Hydraulic or hydroelectric energy is another of the best known alternative energies. It uses the force of water in its course to generate electrical energy and is normally produced in dams.


This alternative energy is one of the most economical and ecological ways of generating electrical energy in a thermal power plant. Biomass energy consists of the combustion of organic waste of animal and vegetable origin. With biodegradable product, such as sawdust, bark and everything that can go “to the brown container”, a fuel can be pressed that ignites the fire like tinder, the coal being substitutable for this product and, on a large scale, it can be used for renewable energy production. If you want to know more about biomass energy visit our article about it.


Biogas is an alternative energy produced by biodegrading organic matter, by means of microorganisms, in specific devices without oxygen, thus generating a combustible gas that is used to produce electrical energy.

Sea energy

Tidal or wave energy depending on whether it takes advantage of the force of the tides or the waves, is the production of (electrical) energy thanks to the force of the sea.

Geothermal energy

Alternative energy that is born in the heart of the earth, geothermal energy is one that takes advantage of the high temperatures of reservoirs under the earth’s surface (usually volcanic) for the generation of energy through heat, as they are usually found at 100 or 150 degrees Celsius . It is an exciting subject on which we have also written an article expanding the information.

What are the challenges of renewable energy?

We are living in a time of energy transition that is characterized by the importance of the use of renewable energies, decarbonization, the use of less polluting fuels, solar panels in our homes, electricity storage systems, or including the electric vehicle in our lives. , among other things. One of our values ​​as a company is precisely to include the energy transition at the heart of everything we do. You can visit our dedicated section on energy transition in Spain for more information.

Faced with this new scenario, it is absolutely necessary to modify our consumption patterns if we want to achieve the goal of reducing CO2 emissions and making a more environmentally sustainable environment.

Likewise, after the liberalization of the electricity company market in 2014, the energy market has turned 180 degrees. Now the consumer is the true protagonist and can choose between different energy contracting modalities or choose the energy marketer that suits him best. This has led to the need to digitize the network for greater transparency of consumption and bills.

Also, the construction of buildings has become much more sustainable with the incorporation of solar panels, energy efficiency elements or even electric car charging points.

In short, fighting climate change requires profound changes in our energy model and in our behavior patterns, but it is already an unavoidable commitment for society.

At SP Solar, we not only act as representatives for renewable energy producers, but we are also committed to the environment and offer clean energy.

If you are concerned about climate change, a good way to stop its progress is investing in green energy. By reducing CO2 emissions we will be able to stop global warming.

Contracting green energy from SP Solar is very easy: you can register the light online, Y check the green energy box, or you can call us at our web and request alternative energy from our Customer Service

In another section of the energy blog, we have Emili Rousaud, director of the company. Emili is a staunch defender of energy and environmental sustainability, and has transmitted and impregnated these values ​​to spsolar. Follow our news and become a defender of the environment!

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