There is no denying that it is becoming more and more profitable to use solar energy as a renewable energy source. It is a clean and unlimited source that comes from the sun and can be transformed into electrical energy using solar panelsHowever, many people wonder how to install solar panels, since there are several key factors to maximize its performance.
This article is designed to guide you step by step in the installation of solar panels in your home. Apart from learning how to install them, you will also understand the advantages of using solar energy and how a solar panel works. photovoltaic system from energy capture to its use in your home.
We are going to tell you everything you need to know how to install solar panels and make the most of its use.
Advantages of solar energy
Before jumping straight into the installation process, it's important to know the benefits of solar energy at home.
- Reduction in electricity bill: By generating your own electricity, you not only reduce your dependence on external power supplies, but you can also save a lot of money on a monthly basis.
- Energy autonomy: In the face of constant increases in electricity prices, having a solar energy system gives a certain independence from the grid.
- Low maintenance: Modern solar panels require little maintenance and have a lifespan of up to 25 years or more.
- Tax benefits and subsidies: In many places, there are incentives to promote self-consumption, such as subsidies or tax reductions, which further improve the return on investment.
- Positive environmental impact: Solar energy is a clean energy source that does not emit greenhouse gases or other pollutants.
What is and how does a solar panel work
To better understand the process of installation of solar panels, it is essential to know how a solar panel works.
Solar panels or plates are made up of photovoltaic cells made of semiconductor materials, such as silicon, which allow solar energy to be transformed into electrical energy. This process is known as photovoltaic effect, through which electrons move between the layers of the cells, generating a direct current (DC).
However, the electrical energy generated by solar panels is direct current (DC) and cannot be used directly in most household appliances, since these operate on alternating current (AC). This is where the power inverter, which is responsible for transforming this direct current into alternating current.
By generating more energy than you consume, it is possible to store the surplus in solar batteries or pour it into the electrical grid to receive financial compensation.
How to install solar panels step by step
Installing solar panels requires a series of technical steps that must be followed carefully to optimize the performance of the system. Below, we explain how to install the photovoltaic system at home step by step:
1. Preliminary evaluation
Before you begin, it is crucial to carry out a technical study to determine whether your home is suitable for a solar installation. This involves assessing the orientation and condition of the roof, the inclination of the roof, and whether there are shadows or obstacles that could reduce the efficiency of the solar panels.
2. Request a specialized quote
Contact an installation company specialising in photovoltaic systems. This company will ask you for several key details such as the type of roof, the available surface area, and your energy consumption. Based on this information, they will provide you with a detailed quote.
3. Permits and subsidies
It is common for the company to take care of the necessary procedures to obtain the permits required for the installation. They will also inform you about the subsidies and grants available in your region.
Components of a photovoltaic installation
Before proceeding with the physical installation, it is useful to know the main components of a photovoltaic installation:
- Solar panels: They are responsible for capturing the sun's energy and transforming it into electrical energy. The number of panels needed depends on the solar radiation in your area and your energy consumption.
- Power inverter: It transforms the direct current generated by the plates into alternating current, which is the one used in your home.
- Solar batteries: If you choose to store excess energy, batteries will allow you to use that energy when there is not enough solar radiation or at night.
- Support structures: These allow solar panels to be fixed to the roof at the appropriate angle to maximize the efficiency of the installation.
Installation Process
1. Assemble the support structure
The first physical step in the installation is to mount the support structure on the roof. Depending on the type of roof and its inclination, the appropriate type of support will be selected. On pitched roofs, structures that take advantage of this inclination are used, while on flat roofs it will be necessary to install inclined structures.
2. Placement of solar panels
Once the structure is in place, the solar panels are placed on it. It is essential to ensure that the panels are not obstructed by any obstacles that may create shadows and reduce their performance.
3. Connection to the inverter
The plates are connected to each other forming a series or parallel circuit, depending on the design of the system. The cables are then connected to the inverter, which will be responsible for transforming the direct current into alternating current for use in the home.
4. Installing the batteries (optional)
If you have decided to include batteries to store excess energy, these must be connected to the system through a hybrid inverter. The capacity of the batteries will depend on your consumption and the size of your photovoltaic system.
5. Connection to the electrical network
The last step is to connect the system to your home's electrical grid, so that all the energy generated can be used in your appliances or stored in batteries. If you want to feed the surplus into the grid, the system must be configured to do so.
Costs and important considerations
The cost of a solar panel installation can vary depending on the size of the system, the quality of the components and the characteristics of your roof. On average, a small installation can cost between €3.000 and €6.000, increasing as the system grows or batteries are added.
Some of the factors that affect cost are:
- The size of the installation and the desired power
- The type of roof and its inclination
- Geographic location and available solar radiation
- Grants and aid available in your area
It is important to remember that, although the initial cost may be high, the investment in solar energy is recovered in the medium and long term thanks to savings on the electricity bill and possible financial compensation for the discharge of surpluses into the grid.
Maintenance of solar panels
Solar panel maintenance is minimal. The main thing is to keep the surfaces of the panels clean so that dust or dirt does not accumulate and can reduce efficiency. It is advisable to check them at least once a year, although in areas where there is more dust or pollution, it may be necessary to do so more frequently.
In addition, it is advisable to have a more thorough technical inspection carried out every few years to ensure that the entire installation continues to function optimally and that there are no damaged parts or loose cables.
With all these considerations and steps in place, you will have an efficient solar panel installation ready to provide you with renewable energy for many years to come. Solar energy is not only a clean and sustainable alternative, but it also provides significant savings in the long term. Taking advantage of available subsidies can make the installation even more cost-effective.