Solar energy production has evolved by leaps and bounds over the years, thanks to technological development. Both in large solar parks and in small self-consumption facilities, solar panels are used. photovoltaic solar panelsIn Spain, the increase in self-consumption has been notable in recent years, with more households opting for photovoltaic installations for various reasons. Among the main reasons are savings on electricity bills and the environmental responsibility that current times demand.
In this article, we are going to explain to you all the characteristics and the operation of photovoltaic solar panels, as well as providing key information so that you can understand how to choose the best option according to your needs.
Main features of photovoltaic solar panels
Photovoltaic solar panels have the ability to generate electrical energy from solar radiation. This energy is completely renewable and does not pollute the environment. Among the great advantages of this type of energy is its automatic generation from the sun's energy. The operation of solar panels is based on photovoltaic solar cells, which transform solar energy directly into electricity. This process occurs through the use of photoelectric energy.
The phenomenon of photovoltaic energy is characterized by the ability of certain materials to generate an electric current when subjected to solar radiationIn this process, the sun's energy releases electrons to create a flow of electrical energy.
The panels are made up of a series of photovoltaic cells, made primarily of layers of silicon combined with phosphorus and boron. These are capable of generating an electric charge when receiving sunlight. These cells are organized into modules that adjust the voltage for direct current systems.
The energy produced is converted into alternating current through an inverter, which allows its use in household appliances and other devices. The voltage provided by the photovoltaic cells is regular and linear, but the amount of electricity directly depends on the intensity of sunlight, which varies depending on the time of day, the time of year and weather conditions.
How to calculate the power of photovoltaic solar panels
Calculating the electrical power of photovoltaic solar panels is crucial to correctly sizing an installation. When analyzing the performance of the panels, the measurement of peak watts (Wp), which serves as a reference to compare different solar panels and determine which is most suitable for energy needs.
The characteristics of photovoltaic modules, including their performance under standard conditions (radiation and temperature), help to predict how many peak watts can be installed to maximize self-consumption capacity. Households, for example, face variations throughout the day and year, both in the best before date of electricity as in the solar radiation available.
To calculate the size and obtain optimal performance from a photovoltaic installation, it is essential to consider the geographical location, orientation and angle of the roof. This allows for adapting production and consumption expectations, estimating the appropriate size of the installation to meet energy needs.
Types of photovoltaic solar panels
Currently, there are several types of photovoltaic solar panels on the market, each with particular characteristics that are better adapted to different needs:
- Amorphous solar panels: Although they are increasingly less used, they are characterized by not having a defined structure. Despite being cheaper, they lose efficiency relatively quickly compared to other types of panels.
- Polycrystalline solar panels: These panels are made up of multiple randomly oriented silicon crystals, which gives them a characteristic blue hue. They are cheaper to manufacture, but their efficiency is lower compared to monocrystalline panels.
- Monocrystalline solar panels: These are currently considered the most efficient. They are made from a single silicon crystal, which allows the electrons to move more freely, thus providing better performance.
Which solar panels are better
When choosing between the different types of solar panels, monocrystalline panels They are the most recommended due to their greater efficiency. Although amorphous panels have started to become obsolete, polycrystalline panels are still a valid option due to their lower cost, although their efficiency is lower.
In comparison, monocrystalline panels, although more expensive, offer better efficiency, performance and heat tolerance, which increases their long-term value. In addition, aesthetically, they are often preferred due to their more elegant design.
Advances in photovoltaic technology
Photovoltaic technology has continued to advance in recent years, offering new, more efficient alternatives. Recent innovations include:
- Bifacial panels: These panels are able to capture sunlight from both the front and back, allowing them to generate more energy throughout the day.
- Heterojunction solar cells (HJT): A technology that combines the advantages of crystalline and thin-film solar cells, achieving superior efficiencies.
These advances, along with other developments such as thin-film solar panels and perovskite solar cells, are revolutionizing the solar market, causing more and more homes and businesses to choose to install solar panels.
Maintenance of photovoltaic solar panels
Solar panels require minimal maintenance, which contributes to their popularity. However, to ensure optimal performance over time, it is important to perform certain maintenance tasks:
- Cleaning: It is advisable to clean the panels regularly, removing accumulated dirt that could reduce the amount of sunlight captured by the cells.
- periodic inspection: It is important to check the status of the inverter and electrical connections to avoid production problems.
It is also important to note that warranties offered by solar panel manufacturers can vary. Currently, higher-quality panels typically come with a 25-year warranty, ensuring less than 20% efficiency loss during that time.
With all these technological improvements and proper maintenance, solar panels can continue to produce energy for more than 30 years.
Photovoltaic solar energy not only allows you to save on your electricity bill, but it is also a 100% clean and renewable energy source, making it an excellent option for any environmentally conscious home or business.