Faq

Every day, enough energy reaches the planet to supply the entire world for a year. And, unlike fossil fuels, this type of energy allows for significantly lower electricity bills and greater independence from the public grid. This makes it a very cost-effective solution and a long-term investment.
Furthermore, thanks to it, we can significantly reduce our ecological footprint. It doesn’t release dangerous carbon dioxide (CO2) emissions. This way, we would be helping to prevent environmental damage and slow climate change.

Solar self-consumption is the use of energy produced by a photovoltaic system for personal consumption, resulting in significant energy and financial savings. A self-consumption system consists of photovoltaic panels that capture sunlight to produce energy, and a solar inverter, which converts direct current electricity into alternating current to power the home and appliances.

The great advantage is that it’s possible to combine solar energy with the electricity grid, prioritizing the energy from photovoltaic systems. This can significantly reduce electricity bills.

Its operation is very simple. The home uses the nearest energy source for its power supply. It is first powered by solar panels and then, if necessary, by the conventional electrical grid. The two complement each other, thus avoiding power outages. In addition, the installation can produce surplus energy that is fed into the electrical grid, compensating for the energy not generated at night or on cloudy days, for example.

Each home or building has different characteristics. However, solar panels can be installed in almost all cases. In fact, we can say that there are almost no roofs on which a solar panel structure cannot be installed. The only ones are thatched roofs, as they are not robust enough to support the weight of the panels. In contrast, flat roofs are the most optimal for photovoltaic installations, as the panels can be tilted and oriented in the most favorable way.

The existence of so many types of roofs has led manufacturers to adapt their supports and hardware to the specific needs of each roof. Furthermore, numerous mechanisms have been developed that facilitate the installation of solar panels on virtually any type of roof. In some cases, they are more complex than others, which can increase the final cost.

Of course, we must keep in mind that in some cases we will encounter some inconveniences due to the resistance of the roof structure itself, usually related to poor orientation or inclination.

Therefore, it is essential that a qualified and experienced expert knows how to select the most appropriate profiles and adapters and install the solar panel structure correctly, with adequate protection to prevent leaks.

There are three main aids for installing solar panels:

• Property tax rebates based on population.
• Next Generation aid from European funds.
• 20% deduction from personal income tax granted by the Treasury in certain cases.

The price of solar panels can vary depending on several factors. The most important thing to consider is the brand, as different brands offer varying levels of quality. Another factor to consider is the color of the panel, since black panels are more expensive than blue ones. The panel’s size and performance also play a key role in determining the price, as larger panels typically have higher energy production capacity.

Additionally, the warranty period affects the price, with some panels offering warranties of up to 25 years. Taking all these factors into account, the average price of a solar panel typically ranges between €250 and €350.

At CleanTec Energy, we ensure that you get the best solar panels tailored to your needs, balancing quality, efficiency, and affordability.

A photovoltaic installation takes about two months on average. The first step is to conduct an energy study to size the photovoltaic installation and select the most suitable products. CleanTec Energy then submits the technical report to the city council, as well as the construction permits. Once the paperwork is completed, we begin installing the panels.

First, we install the supports where we will later mount the solar panels. Once the panels are in place, it’s time to install the electrical wiring and connect the system to the solar inverter. Finally, we connect the inverter to the grid and to the solar battery, if available. Once the entire installation is complete, we’re ready to put it into operation.

Approximately 4-8 weeks after completing an installation, official agencies authorize its operation so you can self-consume solar energy. This is also the time to apply for property tax rebates and available subsidies.
At CleanTec Energy, we’ll handle the entire installation and all pre- and post-installation procedures, so you don’t have to worry about a thing.

The price of solar panels can vary depending on several factors. The most important thing to consider is the brand, as different brands offer varying levels of quality. Another factor to consider is the color of the panel, since black panels are more expensive than blue ones. The panel’s size and performance also play a key role in determining the price, as larger panels typically have higher energy production capacity.

Additionally, the warranty period affects the price, with some panels offering warranties of up to 25 years. Taking all these factors into account, the average price of a solar panel typically ranges between €250 and €350.

At CleanTec Energy, we ensure that you get the best solar panels tailored to your needs, balancing quality, efficiency, and affordability.

Batteries play a crucial role in self-consumption of electricity. They store the electrical energy generated by solar panels, allowing you to use the accumulated surplus when electricity is not actively being produced. This system enhances energy efficiency, increases the profitability of your solar installation, and provides greater independence from the electrical grid.

The way batteries work is simple. As mentioned earlier, they store excess energy generated by solar panels, making it available for use during nighttime, cloudy days, or when sunlight is insufficient. Each battery has a specific storage capacity, which varies based on its discharge rate—the higher the Ah (amp-hour) capacity, the greater the amount of energy your battery can supply.

At CleanTec Energy, we provide high-quality battery solutions to maximize your energy savings and ensure a reliable power supply.

For a self-consumption installation with an annual energy demand of approximately 5,000 kW, the number of panels required for self-sufficiency typically ranges between 5 and 7 panels.

However, this calculation serves only as a general guideline. To determine the exact number of panels needed for your installation, several factors must be considered:

Power Output – The number of panels required is determined by dividing energy demand by the power rating of each panel. Higher power panels reduce the total number required.

 Performance – High-performance solar panels generate up to 25% more energy than lower-cost alternatives, making them ideal for limited spaces while maximizing output.

Annual Daylight Hours – Sunlight availability directly affects production. Installations in cloudy or shaded areas may require more panels to compensate for lower energy generation.

 Orientation & Location – For maximum efficiency, panels should be installed facing south at a 30-40° tilt. Roof positioning and available space also play a crucial role in determining the number of panels needed.

At CleanTec Energy, we tailor each installation to your specific energy needs, ensuring maximum efficiency and long-term savings.

To carry out a solar panel installation, the first step is to hire an installation company that will handle all the paperwork, such as Solfy .

Once we’ve contacted the company, we’ll begin reviewing the procedures for installing self-consumption. 

These procedures are divided into two parts: the administrative procedures before installation and the procedures carried out after the panels are installed.

The steps to take before installing a photovoltaic system are as follows:

• Preparation of a technical report: In the case of residential self-consumption installations, the installer must prepare a descriptive report of the project.

• Access and network connection permits: On rural land, access permits will be required through our installer.

• Responsible declaration of communication of works: This procedure replaces building permits in most of the Autonomous Communities. Therefore, all municipalities in the Autonomous Communities must notify the town councils of the construction work.

• Prior administrative and construction authorization: This is only mandatory for large installations of more than 100kW.
• Public and environmental utility authorization: as with administrative construction authorizations, this is only mandatory for high-consumption facilities.

The procedures to be carried out after installation are:

• Completion certificate: The solar panel installation certificate must be presented for residential projects, and the signed completion certificate must be presented for large industrial projects.

• Initial and periodic inspections: For large projects, an inspection by an Authorized Control Agency must be carried out; this is not required for low-voltage installations. 

• Operating permit: This is a regional procedure similar to the installation certificate.
• Surplus compensation contract: This is one of the procedures that may be of most interest to us. To offset the solar energy supplied to the grid, we must enter into a surplus compensation contract with the marketing company.

To install solar panels, the first step is to hire a professional installation company, such as CleanTec Energy, which will handle all necessary paperwork and procedures.

The installation process is divided into two main phases:

Pre-Installation Procedures

Before installing a photovoltaic system, the following steps must be completed:

• Technical Report • For residential installations, the installer must prepare a detailed project report.

• Access & Grid Connection Permits • If the installation is on rural land, access permits are required.

• Construction Work Declaration • This replaces building permits in most regions and must be submitted to the local council.

• Administrative & Construction Authorization • Required only for large installations exceeding 100 kW.

• Public & Environmental Utility Authorization • Also applicable only to high-consumption facilities.

Post-Installation Procedures

Once the panels are installed, the following steps must be completed:

• Completion Certificate • This official document certifies that the installation is complete and operational.

• Inspection Requirements • Large projects must undergo an inspection by an Authorized Control Agency, but this is not needed for low-voltage systems.

• Operating Permit • A regional approval similar to the installation certificate.

• Surplus Compensation Contract • If you want to sell excess energy back to the grid, a contract must be signed with an electricity provider.

At CleanTec Energy, we take care of all the pre- and post-installation procedures, ensuring a hassle-free and efficient transition to solar energy.

Regular maintenance of solar panels ensures optimal performance of the entire installation. It’s true that the life cycle of quality solar panels can last more than 25 years, but it will depend greatly on other factors, including the constant care of these devices and the entire infrastructure.

Cleaning is essential, but so is professional maintenance performed by CleanTec Energy. This company employs highly experienced professionals with extensive knowledge of the various elements that make up the system, such as the wiring, inverters, control panels, or the bidirectional meter, for example. Keep in mind that incomplete or poorly executed maintenance can result in the installation losing up to 30% of its effectiveness in some cases.

Therefore, preventive maintenance is key to ensuring everything works properly, reducing the chances of anomalies, degradation, or malfunctions. If any problems are detected during these types of inspections, corrective maintenance will be performed to replace or repair the defective elements.

CleanTec Energy only works with the best manufacturers and distributors. We offer materials with manufacturing and production warranties of up to 25 years.

Considering that the payback period ranges from 4 to 6 years and that we can finance the installation in convenient monthly installments starting at €42/month, with no initial investment for up to 10 years, the outlook is practically unbeatable.

Currently, far from taxes on photovoltaic energy generation, there are numerous bonuses and financial aid for installing a photovoltaic system.

A few years ago, a tax on photovoltaic energy generation was established, but in April 2019, the regulatory framework governing self-consumption was modified, eliminating this tax. CleanTec Energy helps customers take full advantage of available incentives and ensures compliance with all current regulations.

Although many people believe that photovoltaic panels don’t capture sunlight on cloudy days, this isn’t true. Obviously, they won’t generate the same amount of energy on cloudy or rainy days as they do on a sunny day, but that doesn’t mean they don’t capture energy.

Therefore, solar panels can work perfectly in both cloudy and sunny areas. Huge solar energy captures have even been recorded in places not typically known for having strong sunshine, such as Germany, Boston, and San Francisco.

With CleanTec Energy, you can rest assured that your system is optimized for all weather conditions. Even during the rainy season, you can still save on your electricity bill, and your panels will stay clean. And, of course, they are designed to withstand adverse weather conditions, such as hail.

When producing our own energy, it’s possible that at certain times we generate more electricity than we consume. If we don’t have batteries, the excess energy will be fed into the grid. CleanTec Energy ensures that this surplus energy is managed efficiently, allowing your electric company to retain it at an agreed price, which will then be deducted from your electricity bill. However, it’s important to note that while you can offset part of your electricity bill, selling energy for profit is not possible. Additionally, fixed charges such as power, meter rental, and other service fees will still apply.

A photovoltaic system includes a meter that continuously tracks electricity production and consumption. This ensures that during low-sunlight hours, you can seamlessly access energy from the grid without affecting your home’s power supply. To maximize savings, it’s recommended to use high-energy-consuming appliances during daylight hours.

In any case, any surplus energy that is not consumed will be returned to the grid. Once properly managed with the Autonomous Community and distributor, your electricity supplier will offset this surplus energy on your electricity bill. CleanTec Energy helps you navigate this process, ensuring you get the most out of your solar investment.