Self-consumption, the best way to save on the electricity bill

What is self-consumption? How does it help you save on the electricity bill? How much has the electricity bill gone up in recent years? Why are the big electric companies of our country now betting on self-consumption, if a few years ago they represented the greatest threat to their development?

Self-consumption, the best way to save in light

<strong>Self-consumption, the best way to save in light</strong>

Solar energy is the future, because of its multiple benefits, and it is the path towards a new energy model in which each person can manage and own their own energy, being freer and becoming a prosumer, an active part of the system.

More and more people are considering taking the step towards photovoltaic self-consumption, but the lack of information on solar energy, the lack of knowledge of the necessary investment or what the savings in the electricity bill would be , generate a lot of uncertainty.

Let’s start with the two types of photovoltaic selfconsumption that exist:

  • Self-consumption isolated, disconnected from the network, which will be the model that is implanted in the medium term when the solar batteries are more competitive. In this case, the energy saving that is produced is on the totality of the invoice, since this disappears and you happen to pay an authentic barbarity to never pay nothing more.
  • and self-consumption connected to the grid, where the electricity network complements your energy demand. Currently, this option is the most profitable for the vast majority of our customers, where in 98% of cases the famous sun tax is not applied . In this case, there is a saving in the variable cost of energy, and performing an optimization of power also in the fixed charge of contracted power. That is to say, you will save in all the sections of your electricity bill.

Whatever option you choose, you will always get an economic and environmental benefit immediately with your installation of solar panels . The best way to see it is with the photovoltaic system installed to one of our clients.


Juan settled down in a detached house in Madrid and saw how he continually paid more and more, for his electricity bill. For this reason, he installed a self-consumption installation connected to a 2 kW network, composed of 8 solar panels that has provided an annual saving of € 650 / year, which means saving 38% of his electricity bill at a cost about € 6,000 that will take less than 10 years to pay off, – solar-panel installations have a useful life of over 25 years.

Evolution of the price of the electricity bill

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To understand the photovoltaic boom that will occur in the coming years, it is necessary to take these factors into account. The prices of solar panels are getting smaller and the price of the electricity bill is increasing. Therefore, having an installation of solar panels is the best solution to avoid paying the disproportionate electricity bills.

The increase in the price of electricity is reflected in the latest report presented by FACUA-Consumers in action; since 2005, electricity has risen 450 € per year . In addition, the price of the kW has increased more than 150% from € 1.78 to € 4.46. Additionally, as of 2017, we have already suffered an increase of 10%, which reduces the income of Spanish families.

If as we are seeing, self-production of energy only brings benefits, and with current prices it is almost impossible not to save light with photovoltaic energy.

Why have the electricity companies and the government stopped the development of self-consumption?

During the last few years, the big electric companies of our country have been influencing the government’s decisions to slow down the development of selfconsumption . But why do they do this? The answer is simple!

The big electricity companies made large investments in their combined cycle power plants at the beginning of the century, and they needed a period of time to be able to amortize them, which is why, due to the great influence they have, they have pressured our government to stop the advance of photovoltaics. With this brake, they have managed to prepare themselves for the new energy paradigm change that is approaching. Realizing that the democratization of energy , distributed generation and renewable energies are already a reality, and have come to stay, they have begun to bet on solar energy and encourage its use.  


However, and for the moment, none of these large electric companies sells 100% green energy, and until that moment their commitment to the environment comes, it will not be total.

The time has come to recover lost time and to bet on a change in the energy model, promoting a green and sustainable future, where solar energy will play a fundamental role. And remember, it’s time to democratize energy, to share resources, to abandon fossil fuels and to bet on photovoltaic solar energy.


3 easy steps to save on your electricity bill

  • Go to self-consumption . Install solar panels on the roof of your home and you will significantly reduce your electricity bill. In addition, if you adapt your consumption habits to the hours of the sun, you will experience even greater savings.
  • Hire a time discrimination rate (DHA). When you have a self-consumption installation connected to the network, it is the cheapest rate. This rate establishes two bands, with a price each. The cheap strip is nocturnal (when your solar panels do not produce electricity), and it goes from 10 at night to 12 in the morning in winter. In summer, it goes on until 11 at night. During the day you will have free energy from your solar panels and at night you will pay a small price for equipment that works all day, such as the refrigerator.
  • Lower the contracted power . The power is the electrical capacity you have contracted and that allows you to activate several teams at once. Most households need less power than they have contracted. The less power you have contracted, the less fixed cost you will have to pay, but you should not drastically reduce your power for two reasons: 1) the installed power in your photovoltaic installation should be less than the contracted power and 2) any peak of consumption would imply that you the leads will jump.

Therefore, getting savings on your electric bill is a simple process if you have the help of qualified professionals. If you want to receive a self-consumption budget without commitment, click here .


All the news that you should know about Solar Panels in 2018

Todas las novedades que debes saber sobre los Paneles Solares  en 2018

Solar energy as a strategic element for the future of energy is in constant state of development and innovation. Practically every week, news of technological advances is published. In the first half of 2018, milestones have been reached in the efficiency of solar panels , improvement of solar storage and new uses of photovoltaic solar technology have been developed.

Next, we talk about the latest developments in photovoltaics.

Solar Technology: 2018 novelties

There are two types of solar technology: photovoltaic (fv) and solar concentration (CSP).

  • Photovoltaic energy captures sunlight to generate electrical energy.
  • Concentrating solar energy reflects sunlight at a point (tower) generating steam that drives a turbine. This technology generates electrical energy even when there is no solar irradiation thanks to the stored heat.

With these two technologies opens a huge range of opportunities. These are the emerging technologies:

New more aesthetic Solar Panels

New more aesthetic Solar Panels

A major barrier to solar energy companies in the residential sector is the fact that a high percentage of owners consider that solar panels are not aesthetic for their homes.

Fortunately, several companies have gone to work in search of solutions. Some of the products available in the market today are:

  • Solar panels without frame . Some of the leading panel manufacturers worldwide such as Canadian Solar, Trina and SolarWorld are producing these revolutionary solar panels. The problem with which they have found is that there are no assembly equipment adapted to this type of aesthetic panels. Therefore, they are manufacturing assembly elements specifically for them.
  • Transparent solar panels . Neither have a frame and the protective casing is made of glass. The manufacturing process is the same as that of conventional solar panels but the usually opaque coating is completely transparent. They are more durable and cause less visual impact than silicon solar panels. DSM Advanced Surfaces and Topray Solar are two of the manufacturers that offer this solution.
  • Solar tiles Tesla. Unique product in its class that deserves its own section. The company of Elon Musk has developed solar tiles that are placed on the roof of the house and its competitive advantage is that by maintaining solar production can not see any difference compared to common tiles. They have different finishes: Tuscan glass, slate glass, textured glass and smooth gray tile.
  • Thin layer solar panel design. The Boston company, Sixtina Solar, allows you to customize the panels. They have created what they call “solar skin” that allows the photovoltaic solar panel to match the appearance of the roof without interfering with the efficiency and production of the panel.
  • Double-sided solar panels or bi-facial panels. As its name indicates, the sun’s rays can be used on both sides. The lower face captures sunlight reflected off the roof. To maximize the reflection of the light, the areas of the cover below the white panel are painted. The company SolarWorld offers the panel Sunmodule XL Solar Power International that consists of 72 cells of high bifacial power and that increases in a 25% the production in front of the conventional panels.

Solar highways

The freeways are part of the future of mobility.

China has a 1 km section of road under test. The aim of this solar road is to generate electricity and to pour it into the electricity grid and it is planned to make it possible in the near future to recharge electric vehicles on the move.

On the other hand, the sidewalks along a stretch of Route 66, the most famous interstate highway in the United States, will be the place chosen as a test bed to implement this revolutionary solar-powered paving technology. This generates clean energy, has LED bulbs that illuminate the road at night and offer heating as a measure in case of snow.

Portable solar devices

Portable solar devices

They are not a novelty. Clocks and solar calculators are two examples of portable solar devices that have been on the market for a long time.

However, innovation has occurred in the textile sector with solar micropanels that are sewn to the fabrics. Two of its applications are the curtains and heated seats of cars. The textile company Marianne Fairbanks is behind this project.

Solar Smart Batteries: innovation in solar energy storage

The main manufacturers of photovoltaic equipment are betting heavily on the development of this storage technology since the market demands it.

Highlight, again, the two Tesla solar batteries:

  • The PowerWall for residential use.
  • The PowerPack for industrial use.

Smart batteries are still an expensive product, but market demand and constant innovation will cause prices to plummet by 2020, when more efficient and affordable batteries will arrive.

Latest technological advances of solar panels

Solar Followers

Solar energy and autoconusmo are becoming the main energy generation method and more and more owners want to put solar panels on their houses even if their roofs are not ideal. In these cases, solar panels mounted on the ground are a good solution.

Solar trackers allow photovoltaic solar panels to maximize electrical output following the sun while moving through the sky. The tracking systems tilt and change direction as the day progresses to always receive optimal solar irradiation. You can find more information about it here.

This technology has been in the market for a long time. However, GTM Research has published a report indicating that the implementation of this type of solution will experience an annual growth of 254%.

Last record of efficiency of solar panels reached

Last record of efficiency of solar panels reached

The last years of the solar industry have been a race against time in order to reach the top in terms of efficiency of solar panels.

Almost every week, state-of-the-art solar panels are announced. Recently, the manufacturer of solar panels Oxford PV has created a panel of efficiency 27.3% . It is a panel containing solar cells with Perovskite (the conventional ones are made of silicon) and which is in the commercialization phase.

Under controlled laboratory conditions, efficiencies higher than 40% have been achieved. An MIT research group works on a new technological concept that captures and uses the waste heat emitted by solar panels. This thermal energy, typically released and not used, is one more opportunity that will cause the reduction of photovoltaic solar technology.

Thermal Solar Fuels

Thermal Solar Fuels

The solar thermal fuels or STF by its abbreviations in English are an affordable solution for one of the disadvantages of the solar energy: the storage. It is necessary to find a feasible solution that makes solar energy a 100% sustainable source of energy 24 hours a day.

The technology and process behind the STFs is comparable to that of a typical battery. The STF can take advantage of solar energy, store it as a load and then release it when necessary. The problem with the storage of solar energy in the form of heat, according to MIT experts, is that heat will always dissipate over time, so it is crucial that solar storage technology can charge energy instead of heat capture . The last prototype of STF presented is simply an improvement of a previous design that allowed solar energy to be stored as a liquid substance. In 2016, an STF application was created in solid state that could be implemented in windows, windscreens, car covers and other surfaces exposed to sunlight.

Water purifiers that use solar energy

Researchers at Stanford University collaborated with the US Department of Energy to develop a new device that can purify water when exposed to solar. The tablet of small dimensions (half the size of a seal) is not the first solar device to filter water but has made great advances compared to past inventions, which need previous purifying designs to take advantage of UV rays that require hours of exposure to the solar to completely purify the water. By contrast, the water purifier at Stanford University can access visible light and only requires a few minutes to produce safe drinking water.

As the technology behind water purifiers that use solar energy continues to improve, these devices the size of a computer key are expected to reach the market considering that hikers are an ideal market niche for this product.

What do these new solar panel technologies mean for homeowners in 2018?

Well, it’s great news. Improvements in efficiency, solar storage and equipment capabilities contribute to a higher production of photovoltaic solar panels at a lower cost.

Buildings that are powered by solar energy

Nowadays, everyone has heard about climate change . This fact, has detractors and supporters, but reality proves its existence. Sustainable development – to continue growing without compromising the future of our descendants – makes it imperative to change the current energy model, which is not sustainable at all.

There is talk of how to fight it on an industrial level, with electricity production based on renewable energies, but what can the citizen do to improve this situation? In addition to recycling, from which we must continue to conscientize ourselves, we have the possibility to produce and consume our own green energy , cleanly, and efficiently. Of all the renewables, solar energy stands out .

Renewable energy resources are within our reach.

<strong>Renewable energy resources are within our reach.</strong>

We must think of a new type of architecture, emerging in recent years, called “bioclimatic architecture” that is based on the use of solar energy in a passive and active way for thermal conditioning and electrical consumption in the home with the objective of energy savings and thermal comfort. In this way, it is possible to reduce the demand for conventional energy and the emission of polluting gases into the atmosphere.

The objective of bioclimatic architecture is to obtain the same comfort with lower energy expenditure, resulting in greater energy efficiency.

The Sun and its energy are the key to achieve this goal. On the one hand, we would have the active systems: solar thermal collectors and solar panels ; and on the other, passive systems, such as orientation and design (with “greenhouse” type zones).

In Spain the sun abounds, so it seems logical to take advantage of solar energy at home.

Image result for spain solarThe complexity that occurs in Spain for this type of architecture, is the different climatology between the different seasons of the year. Comfort conditions must be achieved both in summer and in winter based on the appropriate design.

The passive elements of solar collection are the windows and glazing, the greenhouses or galleries, and the Trombe walls, among others. Depending on the design and architecture of these elements, more or less solar photovoltaic energy is captured, which is used to air-condition the building. For example, rooms with isolated windows that allow the passage of solar radiation are warmer, improving comfort in winter as well as providing natural lighting during the day. The use of a shading element, such as curtains or an awning, prevents the passage of solar radiation in summer.

The active elements, as already mentioned, are divided into thermal solar collectors and solar panels. Through solar thermal sensors, solar energy is used to heat a fluid that is used in heating, for example, by means of radiant floor which is an efficient and comfortable system, and for hot water.

On the other hand are photovoltaic solar panels, which use the light they receive from the sun to produce electricity directly for consumption at home: lighting, appliances, plugs, etc.

Savings in air conditioning with aerothermy and solar energy

<strong>Savings in air conditioning with aerothermy and solar energy</strong>

Nowadays, this energy is also being used in heating through ” aerothermy “. This system is based on the use of machines powered by electrical energy that extract energy from the air to produce heat or cold. The exhaust air can be used directly as heating or cooling by air ducts, or exchange heat with a fluid, such as water, so that it is used in heating or cooling by underfloor heating and as hot water for the home .

Aerothermal machines take advantage of more than 70% of the energy of the air, consuming less than 30% in electrical energy. There is no local combustion of a fuel, without smoke emissions or polluting gases. If, in addition, the electrical energy they need is provided by solar energy facilities , it is an efficient, clean and sustainable system.

Aerothermal machines take advantage of more than 70% of the energy of the air, consuming less than 30% in electrical energy.

According to a study carried out by Toshiba, the use of aerotermia is 25% cheaper than natural gas, reaching a saving of 50% when compared to diesel boilers. These estimates are made assuming the electric power consumption of the network by the thermal machine. If this energy is supplied by solar panels, the savings are greater, becoming “free” if batteries are used to guarantee power supply from the panels throughout the day.


It is true that more solar panels are needed if you want to replace the heating consumption with them. But, its amortization accelerates in time due to the high annual cost of air conditioning for a home (half of the average annual expenditure on energy, approximately).

From SotySolar we want to promote the use of this type of solar energy systems and we hope that some day, when someone mentions natural gas, others ask themselves what is that? Is it possible? What do you think?

SotySolar interview in the SER Chain

Image result for soty solar

Edgar Imaz, partner of SotySolar, exhibited in Cadena SER, with Angels Barceló and Rafa Bernardo, the differential values ​​of our Company that provide energy savings in homes and companies.

Angels Barceló: The issue now has to do with innovation and development, specifically in the world of energy. Rafa Bernardo : Yes, because we are going to talk about solar energy, electric self-consumption, and a platform that promises to be the point of reference for all our doubts in this matter. From how it works the issue of installing panels for our house, to the savings that are generated.

Rafa Bernardo: What are you doing at SotySolar?

Edgar Imaz: To put it very simply, we are a for solar energy. Through our platform, a client solves all the doubts he has about solar energy, receives a real-time profitability study, and then receives and compares the offer of several of our installers, who are the best in the market.

In addition, our customers have a simple and transparent purchasing process, obtain substantial savings on the electricity bill in a manner that respects the environment and also have the highest quality photovoltaic equipment.

Finally, we say that we offer different forms of financing and we carry out all the legal procedures as well as manage the subsidies.

Angels Barceló: Why is this company born? Where does this interest in solar energy come from?

Edgar Imaz: The three promoters of this project – Hipólito Álvarez, Daniel Fernández and I – were collaborating on another renewable energy project and, being involved in this project, we detected a need. More and more people were fed up with how high the electricity bill was.

As you can see every month it keeps increasing, and they did not know what to do to reduce it. Then we, as we had that knowledge, because it was the way we started SotySolar, to end these problems. And focusing everything on the solar self-consumption.


Angels Barceló: What kind of people are interested in you, for the solar self-consumption?

Edgar Imaz:   We cover different types of clients, the owner of a single-family home that wants to put some plates on its roof, neighborhood communities and SMEs. While it is true that the vast majority of customers we are receiving are owners of single-family homes.

Rafa Bernardo: As a help or as a disincentive to the current regulation, the use of solar energy in its self-consumption mode?

Edgar Imaz: Okay (this one I know) – This regulation about all he did was cause unfounded fear in the population. Self-consumption, despite what people think, is legal and profitable. And the famous sun tax that everyone talks about does not apply in 98% of cases. In that 2 that applies, even so, you keep earning money and being profitable.

Angels Barceló: Let’s go to a number about SotySolar, how long have you been running? In what geographical area do you arrive?

Edgar Imaz: We started with the company a little over a year ago, with the first studies and validation of the market. From January 2017 we started with the developments of the platform, and we are fully operational since May of this year.

We are happy that even though all the beginnings are very hard, we already have a presence throughout Spain. We have more than 25 professionals on our platform and sales are growing week by week.

Rafa Bernardo: How far do you want to go? What is your aspiration or your objective?

Edgar Imaz: If we talk in the medium term, in 2018 what we seek is to consolidate ourselves in the national market and expand internationally.

Our mission as a company is to change the energy model that currently exists, promoting green energy and self-consumption. That each person can manage and own their own energy, democratizing it, and converting people into prosumers.  

Rafa Bernardo: What are the main doubts about solar energy and its world with which you find yourself?

Edgar Imaz: The biggest doubt is the sun tax – laughs – but then if we find a lot of doubts of any scope. Depending on whether your home is suitable, that is, if you have good guidance and good conditions to put plates. What is the saving that they will have and the subsidies that apply or if they do not get paid. They are very varied doubts. Each client in this case is a world.

Angels Barceló: Edgar Imaz, founder of Sotysolar, thank you very much for being with us today.

Aids to lithium batteries for installations of solar panels in Catalonia

Ayudas a las baterías de litio para instalaciones de placas solares en Cataluña

The Generalitat through the Catalan Energy Institute (Icaen) has activated the subsidies for lithium ion batteries for solar self-consumption facilities. This line of aid that is aimed at individuals and neighborhood communities, has an economic support amounting to € 360,000.

With this measure, the Government seeks to promote the installation of solar panels on roofs and roofs of houses and buildings, also enhancing the advantages of this type of facilities by enabling the storage of energy to be consumed both day and night. For the Catalan Institute of Energy, this is a preliminary step to the creation of solar communities that exchange energy, whether they are citizens or industries.

The grants will cover 70% of the cost of the batteries and associated equipment, with a maximum of € 5,000 per installation and applications can now be submitted. The objective of Icaen is to guarantee the right of citizens to produce, store and share their energy while Catalonia moves towards a renewable, distributed and democratic energy model.


This line of subsidies for self-consumption comes from the work carried out in the context of the Taula d’impuls to the photovoltaic self-consumption of Catalonia, promoted by the Catalan Institute of Energy and which brings together representatives of municipal administrations, professionals and users. The objective of this table is none other than to eliminate the different regulatory, administrative, economic and knowledge barriers that hinder the generalization of this practice and reaffirms the commitment of the Government of Catalonia with a new energy model.

As indicated by the Icaen in its communiqué, the synergies between the different agents of the Table for Promoting Self-consumption , as well as the unequivocal interest of the Government in advancing the use of solar energy, have led to the emergence of business collaborations between suppliers of batteries, engineers, distributors, electrical traders and financing entities, who work to develop new and innovative business models, essential to advance in the democratization of renewable energies and that with these grants will see their initiatives strengthened.


With the clear objective of creating solar communities, the Government of Catalonia marks a way forward for the rest of the country in which it is committed without complexes to an energy model based on solar self-consumption , promoting a green and sustainable future.

“Talking with the SotySolar team gave us the confidence to do it” – AMM Capital

Meet our solar energy companies – AMM Capital

Image result for solar energy companies

Today, we talk to one of our solar energy companies in Bizkaia and Madrid. We will talk about its beginnings, its services, the future of the sector and its experience with us after a month on the platform.

1.- Tell us, how did AMM Capital arise?

AMM Capital arises in 2011 due to the interest of a group of professionals with long experience in the renewable energy sector to unite their capacities to develop projects that add value to society and its customers.

2.- Why did you decide to bet on solar self-consumption?

We bet for the self-consumption of municipalities, towns, urbanizations and industries in its beginnings not only in Spain, then to see the complexity of the regulations, the problems that were presented to make them and more recently the variants of being able to offer global energy self-consumption that includes electricity, air conditioning and electric vehicle charging we decided to include it in our activities taking into account the challenge of its long-term profitability.

3.- How has the path of AMM Capital been until reaching 2018?

AMM Capital’s path up to now has been in keeping with the times, with difficulties but always growing, with the satisfaction of having a group of clients who count on us again and again for new projects, to keep the built ones, to advise them in negotiations … we have gained their trust and respect in our profession and most importantly, with a united human team and highly integrated as a team.

4.- Do you offer other services besides photovoltaic energy?

We offer services in wind, mini-hydro, energy storage, energy management systems and network integration.

5.- After some difficult times, are you noticing a change in the perception of the population regarding photovoltaic self-consumption?

In this year we noticed a growing interest in the installation of self-consumption systems although the regulations do not facilitate it, we suppose that it helps that the professionals of the sector have internalized it and looked for solutions, as far as possible, to its restrictions. On the other hand, the price of solar panels has decreased in the last years making the installations less expensive.

6.- What period of amortization can a standard client expect when requesting a quote? And an industrial client?

The amortization always depends on the consumption habits, whether they are diurnal or nocturnal, with purely diurnal habits it is amortized in 4-7 years, if it is residential that always has a significant night component between 8 and 12 years. The key is to use that energy of light at the time of generation to generate ACS or air conditioning, be it cold or heat or load vehicles. Keep in mind that costs of electricity, natural gas and fossil fuels are reduced. If you want to use solar energy at night through storage, the amortization is between 15 and 18 years old, the positive is that it almost does not consume electricity from the network, obtaining greater savings.

7.- In your opinion, what should change or what measures should be implemented so that the sector can take off?

In order for the sector to take off, the limitation of installing up to 5kW on solar panels in single-phase installations must be eliminated, and the population must be educated on the possibility of using self-consumption as energy, not just electricity.

8.- When do you expect a true photovoltaic “boom” to take place in Spain?

We hope that there will be a boom when the regulations change if the general economic conditions of the country are maintained as in the last 2 years.

Now, let’s talk about your relationship with SotySolar :

9: – How did you know us?

We met SotySolar online.

10.- Why did you decide to try it?

We decided to try it in the presence of customers, unusual, near our headquarters for self-consumption. We had tried another website with very bad results in terms of the existence of true customers and we were reluctant. Talking with the SotySolar team gave us the confidence to do so.

11.- What type of publicity did you do before using our services?

We advertise on our website, industry media, Google+, Facebook.

12.- What advantages do you consider that SotySolar has contributed to your business?

SotySolar has provided a variety of clients.

13.- How would you rate the clients that come to you from our platform?

The clients are very hopeful with the self-consumption, we hope that the regulations allow some to obtain the solutions they seek and help them to decide

14.- In spite of having little time enjoying our services, is there any experience with an owner acquired in SotySolar that you wish to share?

At the moment we are in negotiations with everyone. Not yet.

What is green energy?

¿Qué es la energía verde?

It is a term that sounds very good and that is booming in recent times, but do we really know what it refers to? Is it possible to consume 100% renewable energy? How can we access it? We will try to answer these and other questions in this post.

What is Green Energy?

Well, we tend to tend to confuse renewable energies with green energy , and the difference is that all green energies are renewable, but not all renewable energies are green.

For example, the Great Hydraulics (> 10 MW) is a source of renewable and clean energy, but the important impact it causes in its river environment prevents it from being described as green.

When we talk about Green Energies we refer to infinite resources from non-polluting sources and respectful with the environment. This group includes energies such as solar, wind, tidal …

In 2016, in Spain, 38.9% of the generated energy came from renewable sources, wind heads the production with 18.4%, followed by hydraulics with 13.8% and behind were photovoltaic and thermal solar energy with 3.1% and 2% respectively, the remaining 1.6% corresponds to the rest of renewable energies.

How can I consume Green Energy?

Image result for green energyThere are several ways, but the only one in which we can be completely sure of the renewable source of our energy is self-consumption . By installing solar panels on our roof we can generate enough clean energy to cover 100% of our energy demand or a good part of it.

Another option to consider is to hire the services of any of the multiple marketers that currently offer their customers the possibility of consuming 100% renewable energy, and that is already more than 30 companies that advertise this service in our country. Now, as we already know, we must bear in mind that 100% renewable does not have to be 100% green and we will have to study the offers of the different marketers to make sure of the origin of our energy.


Can I consume only 100% Green Energy?

The answer is clear, Yes !, but only if you opt for self-consumption , because as we have seen before, it is the only way to be sure of the origin of our energy because we are the ones who are producing it.

Now, if you bet for the services of a green energy marketer we should know that, the electricity that reaches our house can never be 100% green, but do not be shocked, everything has an explanation.

It is impossible for the electricity distribution network to distinguish which electricity comes from a renewable source and which does not, the energy that comes to our homes is a mixture of both. So:

How can marketers offer green energy?

<strong>How can marketers offer green energy?</strong>

What these marketers really do is commit to buy as much energy as we consume, to renewable energy producers or even to produce it themselves.

With this system, our energy expenditure will go to companies producing renewable energy and in this way we will be encouraged to generate this type of energy, since the higher the demand, the greater the supply must be.

In order to demonstrate the renewable origin of the energy sold by the marketers, the Ministry of Industry created the Guarantee of Origin in 2007, which guarantees that all or part of the energy generated by a producer is renewable and can therefore sell it with this seal.


While it is true that the current model generates considerable controversy in the sector by not contemplating the obligation of investments in new renewable energy facilities, which may allow some production companies to obtain the seal, but not really bet on them.

In this aspect, transparency must play a key role in the development of this type of product, not so much of the marketers as of the producers. A more restrictive conditions when it comes to obtaining the guarantee certificate, surely, would help in this regard.

The future is renewable

In these lines it has become clear that clean energy has come to stay. Today it is in our hands to bet on it, either in the form of self – consumption , hiring it through a marketer or a combination of both solutions.


The future seems encouraging for renewable energies , in countries such as Spain, which meets all the conditions to be at the forefront of the energy revolution to which sooner or later we will be led and that is why we must take the reins and start take advantage of the renewable energies that we have at our disposal.

Aerotermia: What is it and how does it work? Advantages of combining it with solar panels

Aerotermia: ¿Qué es y cómo funciona? Ventajas de combinarla con placas solares

The aerotermia is booming. In recent years, many users have adopted this renewable energy as a system for generating heat and cold, replacing the traditional boilers that were common in homes.

What is aerothermia and how does it work?

The aerotermia systems are heat pumps of last generation that are used to produce hot water, cooling in summer and heating in winter. It is a highly efficient system.

The aerotermia is, therefore, a heat pump that extracts heat from the air to produce cold or hot water and use it for heating , air conditioning or domestic hot water (DHW) .

 Aerothermy can be associated with numerous heating / cooling systems such as underfloor heating, fan-coils (water-air equipment) and low-temperature radiators. The most common association is that of aerotermia and radiant floor.


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The radiant floor is a system of heat / cold that has a high thermal inertia since the entire mass of the ground is heated so that it, in turn, warms the air of the house. Thermal inertia is the amount of heat that can accumulate and preserve a solid body. It is the cause that when we turn off the heating, the house stays hot for a certain period of time.

The fuel used is electricity and the yields range from 250% to 450% depending on the outside temperature and the water temperature that you want to reach, whether for use in radiant floor or hot water. In the areas near the coast is where you get the maximum performance of aerotermia equipment.

Aerotermia: What power do I need?

In order to know the exact power of an aerothermal equipment, it would be convenient to perform a calculation of thermal loads taking into account the effect of thermal inertia. The method recommended by IDAE is the RST (Temporary Radiant Series) and is summarized in the following image:

  For this calculation to be accurate, it must be done by an expert and there must be a safety margin on the 100% theoretical result for unforeseen events.

Let us suppose the following example: the calculation of thermal loads strut has determined that your single-family house needs 18 kW thermal at the time of maximum demand, so we would need an aerothermal equipment of at least 18 kW.

Let us suppose now that these 18 kW are only needed during the coldest 6 hours of the day, during the 12 intermediate ones we need 12 kW and in the 6 hottest ones we only need 6 kW.

In this case, we could provide a constant power of 12 kW (18 * 6 + 12 * 12 + 6 * 6) / 24 and use the thermal inertia in our benefit.

This is an example, although it is usual for cold and heat installers to use approximations of 50 W / m2 and 100 W / m2 depending on the location, whether the insulation is good or bad, …

Price of Aerothermia

In existing buildings, the average price of an aerothermic equipment is between € 1,200 and € 2,500 for homes with less than 4 bedrooms. The amortization can be between 5 and 12 years depending on the fuel to be replaced: butane is more expensive than natural gas.

Combination of Aerotermia with Solar Plates

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The aerotermia machine can be supplied with photovoltaic solar energy in the event that the installation of solar panels produces enough electricity. In this way, we minimize consumption and optimize more savings.

If you combine photovoltaic energy with aerothermy to produce ACS, you can have a 350% more performance , that is, 3.5 kWh produced by each 1 kWh electric energy used in design conditions (outdoor temperature lower than 35ºC in summer and higher than 5º C in winter).

This combined solution of aerothermy with photovoltaic is more efficient than solar thermal energy to produce ACS.

5 reasons to combine Aerotermia with Photovoltaics

  1. The aerotermia can be considered a renewable energy because it contributes up to 75% of its energy for free thanks to the air.
  2. The performance of photovoltaic energy to produce ACS increases more than 80% together, exceeding the thermal solar performance.
  3. You use solar panels to generate part of the electricity needed by the aerothermal machine to generate heat and cold.
  4. The surplus of photovoltaic can use it for other electrical consumption of the house. The saving is double.
  5. The maintenance of both the installation of solar panels for self-consumption and that of aerothermy is minimal and much lower than any conventional boiler.

For these 5 reasons, the aerotermia with photovoltaic plates is an excellent solution. You are also saving energy and money without harming the environment.

The Town Councils and self-consumption

In this post we will try to analyze the crucial role that local administrations must play in the development of self – consumption within their territorial limits.

The current legal framework, with the RD 900/2015 that regulates energy self-consumption, allows municipalities to promote a new energy model more efficient and sustainable, through the adoption of different measures that we review below.

Tax incentives

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With regard to the IBI (Property Tax and Real Estate), article 74.5 Royal Legislative Decree 2/2004, of March 5, approving the revised text of the Local Treasury Regulatory Law, provides for bonuses of up to 50% of the quota for real estate that has installed photovoltaic solar panels .

This RD provides a similar bonus for the ICIO (Tax on Constructions, Installations and Works), with up to 95% of the tax quota for photovoltaic self-consumption facilities .

Facilitate administrative procedures


It is in the hand of the Local Governments to establish in their ordinances mechanisms that simplify the implementation of this type of systems.

In the case of installations of reduced power, the substitution of a municipal license should be considered for a responsible declaration or prior communication, which would be a step forward in supporting a new sustainable energy model that respects the environment.

Obligatory self-consumption systems in certain buildings

It is possible that the local administration, through the approval of the due ordinance, imposes the obligation to use solar photovoltaic systems in certain cases.

With the aim of fulfilling the political will regarding sustainability and the environment, municipalities can impose the execution of self-consumption facilities in commercial buildings and services frequented by the public.

Lead by example

<strong>Lead by example</strong>

Municipalities, like the rest of Public Administrations, must take charge of the European Directives on renewable energies and promote energy self-consumption as the most responsible form of consumption that exists today.

It depends on the town councils to put themselves at the forefront of the energy transition that is already unstoppable, implementing systems of energy use in their own buildings.

It is the responsibility of Local Governments to mark their own energy policy and to strive to be the spearhead of this change of system, preaching by example.

“In general, they are very good quality clients, with very clear and well informed ideas about photovoltaics and its benefits.” – Green Energy Quantum

Meet our solar energy companies – Quantum Energía Verde

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Today, we talk to one of our solar energy companies in Seville. We will talk about his beginnings, his services, the future of the sector and his experience with us after a year on the platform.

1.- Tell us, how did Quantum Energía Verde arise?

Quantum Energía Verde was created at the end of 2016 by the union of a team of Andalusian industrial engineers who are experts in the field of renewables, who have developed their professional careers in multinationals such as Abengoa, Isolux Corsán or Solar Century, managing large-scale projects international.

This acquired knowledge is what we now want to transfer to the industrial and residential sector in Andalusia, offering energy solutions adjusted to the needs of each family and company.

2.- Why did you decide to bet on solar self-consumption?

Andalusia has one of the best performance ratios in Europe for the use of solar energy, together with the cheaper cost of materials in recent years makes this type of facilities very profitable investments for homes and businesses. There is also ‘everything to do’ in this field, so it is also a good contribution to reduce the dependence on foreign energy, and do it in a clean and sustainable way.

3.- What has been the path of Quantum Energía Verde until 2018?

From the beginning we make a great effort to publicize the possibilities of photovoltaic self – consumption , disseminating its benefits and advantages in a didactic way, addressing and trying to solve the myths and legends that revolve around photovoltaics and the aspects that have limited its growth in recent years. We try to offer quality information to anyone interested in these systems and, of course, we are an installation company and with much effort and dedication we are developing many facilities at the residential and industrial level.

4.- Do you offer other services besides photovoltaic energy?

At Quantum Energía Verde we are ‘by and for’ photovoltaics and self-consumption. We specialize in installations for residential, company and solar pumping, both in grid-connected or isolated installations, and we exclusively dedicate ourselves to this.

5.- After some difficult times, are you noticing a change in the perception of the population regarding photovoltaic self-consumption?

Fruit of the deep ecological and environmental awareness of the Andalusians little by little we are observing how there is a positive approach to photovoltaic self-consumption as a clean, green, sustainable and viable energy alternative. This is compounded by the boredom of citizens with electricity companies and the continuous increase in the electricity bill that makes them look for ways to be more efficient with energy consumption at home. In addition, from Quantum we made many efforts to demolish myths and legends about this technology as the issue of the nonexistent ‘sun tax’ or the general perception that these facilities have a very high cost. All this makes Andalusians increasingly interested in finding ways to reduce electricity bills at home and do it in a clean and sustainable way with renewable energies such as photovoltaics.

6.- What period of amortization can a standard client expect when requesting a quote? And an industrial client?

Currently, both companies and individuals in Andalusia can count on a subsidy that covers up to 45% of the cost of photovoltaic solar panel installations , so that, depending on each case, both private and business investments can be amortized between 4-7 years, if the accumulation systems with lithium-ion batteries are added to the facilities, the amortization period is extended between 5-8 years.

7.- In your opinion, what should change or what measures should be implemented so that the sector can take off?

There are many measures that would help boost the sector without resorting to incentives or subsidies: simplify administratively the legalization of facilities, regulate the collective or shared use of energy, eliminate the obligation to install a 2nd meter, implement some formula of ‘ net balance ‘, to make the legal limits for the installations more flexible, to subsidize the photovoltaic at municipal or local level or simply to give greater political and media diffusion to the advantages and benefits of the photovoltaic as clean and green energy for all.

8.- When do you expect a true photovoltaic “boom” to take place in Spain?

The high energy cost of families, together with the growing environmental awareness and the cheaper cost of installing photovoltaic solar panels, suggests that in the next decade many families and companies can join the photovoltaic current.


Now, let’s talk about your relationship with SotySolar:

9: – How did you know us?

Well, like almost everything today on the internet. So in the summer of 2017 we learned about the start-up of Soty Solar through news in digital media.

10.- Why did you decide to try it?

We thought it was very interesting that there was a portal like Soty Solar specialized in solar energy, with good web quality, good content and aimed at bringing exclusively to citizens especially interested in photovoltaic energy with companies specialized in the sector.

11.- What type of publicity did you do before using our services?

Traditional offline advertising and some online activity in other more general portals.

12.- What advantages do you consider that SotySolar has contributed to your business?

In addition to providing contact with citizens very interested in photovoltaics, they provide us with knowledge about the state of the sector, technical and political developments, always with a very careful and close treatment.

13.- How would you rate the clients that come to you from our platform?

In general, they are very good quality customers, with very clear and well informed ideas about photovoltaics and its benefits.

14.- Is there any experience with an owner acquired in SotySolar that you wish to share?

All customers feel very satisfied with their facilities. We speak mainly of individuals who already knew the photovoltaic and waited for a specialist company to carry out the project, something that with the relationship through Soty Solar they got.

By sharing the experience of some of them, we have a family in the province of Málaga who, shortly after starting up their installation with batteries, wanted to expand the accumulation system, because despite being covering more than 80% of their energy consumption in The house still produced more energy than it used, and of course, they did not want to waste even one kWh of energy from their photovoltaic installation.