Solar energy is one of the most promising alternatives for those looking to reduce energy costs and, at the same time, reduce their environmental impact. With the increase in discussions about sustainability and the urgent need to adopt greener practices, More and more people and companies are investing in this technology.
However, despite its growth, many doubts still surround the subject: since the the operation of solar systems through to the financial return and the real advantages for the environment.
In this article, we will discuss these topics, helping you to better understand how solar energy can be an excellent option for the future.
What is solar energy?
Solar energy is the energy that comes from the sun. This natural and abundant source can be converted into electricity for use in homes, businesses and industries.
The process begins when solar panels, installed in places that receive a lot of sunlight, capture this energy. These panels transform sunlight into electricity that can be used immediately or stored for later use.
One of the great advantages of solar energy is its positive impact on the environment. Unlike traditional energy sources such as oil and coal, solar energy does not emit polluting gases and helps to reduce the carbon footprint.
What's more, it's a super economical option in the long term. After the initial investment in installing the panels, the cost of the electricity bill is greatly reduced, generating surprising savings over the years.
How does solar energy work?
How solar energy works is simpler than it sounds. Solar panels, placed on roofs or open areas, are light collectors. They capture sunlight and transform it into energy.
When the sun shines, it sends rays of light to Earth. Solar panels capture this light and turn it into electricity. This electricity can be used immediately to power appliances and illuminate rooms, or can be stored in batteries for use at night or on cloudy days.
The electricity generated by the panels passes through a device called an inverter, which gives it to the panel. converts into a format that can be used in the power grid of a home or business. It works like an adapter, ensuring that the energy generated can be used in a wide variety of ways.
Benefits of solar energy
Solar energy brings numerous benefits that can be divided into three main categories: economic, environmental and social.
Economic benefits
One of the main attractions of solar energy is the significant reduction in electricity bills. By generating your own energy, you greatly reduce your monthly costs, and in some cases.., it is even possible to eliminate these costs completely.
In addition, properties equipped with solar systems tend to increase in value on the market.This makes them more attractive to potential buyers. Another positive point is low maintenance: once installed, solar panels require little care, which reduces costs over time.
Over time, the initial investment is recovered through savings on the energy bill, providing one of the most profitable returns on investment.
Environmental benefits
Solar energy is a clean and renewable source, which makes it a sustainable choice. By opting for this alternative, you contributes to reducing dependence on fossil fuels, which are largely responsible for the emission of polluting gases.
It also helps to reduce the carbon footprint, since the electricity generated by the panels does not emit CO2. By using solar energy you also contribute to the preservation of non-renewable natural resources, ensuring a more sustainable future.
Social benefits
Opting for solar energy also has social advantages. Installing a solar system allows you to have greater energy independence, reducing your dependence on utilities and this makes you less vulnerable to variations in energy prices.
In addition, the expansion of solar energy generates new jobs, mainly in the solar system installation and maintenance sectors, which benefits the local economy. We must also mention that by adopting this technology, you promote environmental awareness in your communityencouraging others to also opt for more sustainable solutions.
Types of solar energy systems
There are different types of solar energy systems available on the market, the main ones being on-grid systems, which are connected to the electricity grid, and off-grid systems, which operate independently, without connection to the grid.
Let's get to know each of them better:
| Type of system | Features | Advantages | Disadvantages |
| On-grid | Connected to the public electricity grid. | Possibility of selling the surplus energy generated to the concessionaire. | Shorter power supply in the event of a blackout on the public grid. |
| It uses the grid as a "backup" when solar energy production is insufficient. | Lower initial cost compared to off-grid systems. | It needs the public electricity grid to store or dispose of the surplus energy generated, and is subject to grid instability. | |
| Common in urban areas. | Greater savings on electricity bills due to the exchange of energy with the grid. | It needs approval and contracts with the local utility. | |
| Off-grid | Not connected to the public electricity grid, operating autonomously. | Total energy independence, ideal for remote locations or those without access to the mains. | Higher initial cost due to the need for batteries for energy storage. |
| It stores the energy generated in batteries for later use. | It works even during blackouts or in areas without mains coverage. | You need space to allocate batteries and size the quantity according to the volume you need to store | |
| Common in rural areas or isolated locations. | Greater control over energy generation and use. | Subject to the capacity of the batteries, expansion is necessary according to the increase in consumption. |
Does solar energy work on cloudy days?
Yes, solar energy works on cloudy daysBut energy production is lower. When the sky is cloudy, less sunlight reaches the panels, which reduces the amount of energy generated. Even so, the solar panels manage to capture the light passing through the clouds and convert it into electricity.
On rainy days or in places where there is snow, production can also drop, but the system continues to work. These systems are designed to operate in different weather conditions, so even in bad weather, they still generate energy. In regions where cloudy days are common, the systems can be adjusted to ensure that you make the most of the available light.
Solar energy at night
To continue using solar energy at night or on very cloudy days, you can install storage batteries. They store the energy generated during the day so that you can use it at nightwhen the panels are not producing electricity.
There are different types of batteries, such as lithium-ion and lead-acid. Lithium-ion batteries, such as Lithium Iron Phosphate (LiFePO₄ or LFP), are highly efficient, have a long service life and excellent energy storage.
An example of this are the Blade Batteries, patented by BYD and used both in the brand's electric vehicles and in large-scale stationary energy storage systems. Lead-acid batteries, on the other hand, although cheaper, have a shorter lifespan and require more maintenance.
By using batteries in your solar system, you gain more energy independence, can better control your consumption and even protect yourself against power outages. This means that you can use solar energy 24 hours a day, even when the sun isn't shiningYou'll get even more out of your investment and save on your electricity bill.
How much energy does a solar panel generate?
The amount of energy a solar panel generates depends on factors such as its power and the amount of sun it receives throughout the day. Currently, More powerful modules, such as 615 watts, are widely used. In good sunny conditions, a 615W panel can generate between 2.4 and 2.7 kWh of energy per day.
Over the course of a month, a single panel can produce around 72 to 81 kWh. If you install more than one module, energy production increases proportionally and can supply a significant part or even all of your electricity demand.
Therefore, energy generation can be adjusted according to your needsoffering a sustainable and economical solution to power your home or business.
Costs and savings with solar energy
Although installing a solar energy system has its initial costs, the long-term savings are quite significant. Let's explore the main financial aspects of adopting this technology.
Initial investment in solar energy
The initial cost of a solar energy system includes the purchase of solar panels, inverters, mounting structure, cabling and professional installation. The cost can vary depending on the size of the system and the complexity of the installation, but generally the return on investment is achieved within a few years due to the savings generated on the electricity bill.
Tax incentives for those with solar energy
In addition to tax incentives, such as tax exemptions on equipment or reduced property taxes, the Brazilian government offers the FinameA line of credit for the purchase of clean energy equipment, such as solar systems.
BYD has a team specialized in finished equipment, facilitating access to these advantageous conditions and making investment in solar energy even more accessible and attractive for companies and consumers. These incentives help to significantly reduce the initial cost, driving the adoption of sustainable solutions.
Long-term savings
After installation, the energy generated by the solar panels reduces or even eliminates the need to buy energy from the utility, resulting in monthly savings on electricity bills.
To illustrate, imagine that a solar energy installation brings R$300 in savings per month. In a year, it will result in R$3,600 in savings. Over a few years, these savings exceeds the initial cost of the system, generating a positive financial return.
Tips for maximizing return on investment
Just as it is possible to implement techniques to save conventional electricity, we've come up with some tips so that you can maximize the return on your investment in solar energy as soon as possible.
- Proper sizingmake sure that the system is the right size to meet your energy needs, avoiding buying a system that is larger than necessary.
- Take advantage of incentivesresearch and use all available tax incentives and financing programs to reduce the initial cost.
- Monitor consumptionAdopt conscious consumption practices, adjusting energy use to the times when the solar system generates the most electricity.
- Regular maintenancesolar panels: carry out regular maintenance on solar panels to ensure that they are operating at maximum efficiency.
- Choose a suitable locationInstall the panels in a place that receives as much direct sunlight as possible, without shading that could reduce efficiency.
- Sell what's leftIf possible, sell the leftover energy back to the grid, which can generate additional credits and further reduce your electricity bill.
How to transfer solar energy to another home
If you are planning to move house and already have a solar energy system installed, you may be wondering if it is possible to transfer this system to the new home. The good news is that it is possible.
To do this, you need uninstall the solar panels and other components of the system and install them in the new house. It is important to hire specialized professionals to ensure that everything is done correctly, avoiding damage to the system and ensuring that it works well in the new location.
Now, if you only want to transfer the energy and keep your installation in the same place, there are two main ways of transferring solar energy from one house to another: direct sharing and energy credits.
Direct sharing
In direct sharing, the energy generated by a solar system on one property is used by other properties nearby, as long as they are in the same concession area as the energy distributor.
To do this, a group, such as a cooperative, can invest in a solar system installed on a common site. The energy generated is fed into the electricity grid and nearby properties may or may not have access to it.
Energy credits
Energy credits allow you to the energy generated in one property is used to reduce consumption in other properties owned by the same owneras long as they are in the same concession area.
For example, if you have a solar system in your home, the energy generated can be converted into credits and used to reduce the electricity bill of another property under the same CPF or CNPJ.
Direct sharing is ideal for groups that want to share the energy they generate, while energy credits make it possible to offset consumption on different properties. The choice depends on your needs and the possibilities available according to local regulations.
From how many kW does solar energy pay off?
Solar energy compensates for any size of consumption, whether residential, commercial or industrial. Whether your energy demand is small or large, investing in a solar system always brings benefits.
For homes, even a smaller system of 2 to 3 kW can generate huge savings on your electricity bill. For companies or industries, larger systems, above 10 kW, offer a significant reduction in operating costs.
The greater the demand, the greater the savingsBut even a small system makes a big difference to your pocket and the environment, especially in times when prices fluctuate so much.
Maintenance and durability of solar energy systems
Solar energy systems are very durable and easy to look after, but some regular care will ensure that they work well for many years to come.
Care and maintenance of solar energy
Solar panel maintenance is simple. Basically, an annual cleaning is sufficient in most cases. Using water and neutral soap to clean the panels removes dust, leaves and dirt that can get in the way of capturing sunlight. If you live in an area with a lot of dust or pollution, you'll need to increase the frequency.
In addition to cleaning, it is important to always check the system components, such as cables and connections, to make sure everything is in order. A quick visual check-up can help identify any problems before they affect system performance.
Some components need attention:
- Inverters: the inverter transforms the energy from the panels into usable electricity. Checking its operation from time to time and replacing worn components helps to avoid problems.
- Fixing structure: the structure supporting the panels must always be firm and free from corrosion. Be extra vigilant if you live in damp areas or near the sea.
- Batteries (for off-grid systems): if you use an off-grid system, the batteries need to be monitored regularly to make sure they are working well.
Climate and location
The climate and location of solar panels directly affect their durability. If you live in an area with a lot of rain or storms, always check that the panels are securely fixed to avoid damage. In areas near the sea, salty air can cause corrosion, so it's important to check the structure more often.
And as you already know, in places with a lot of dust or pollution, you may need to clean the panels more often. With these precautions, your solar energy system can last between 25 and 30 yearsThis will provide clean and economical energy for decades to come.
How to choose a solar energy company
Installing a solar energy system in your home is sure to transform your family's life, but choosing the right company to install is an important decision that will directly impact efficiency and durability of your system. Find out what to consider when choosing:
Experience and reputation
Look for companies that have a good track record in the solar energy market. Check for how many years they have been in business and how many projects they have completed.
It is also necessary to take a look at the reviews and testimonials from other customers to get an idea of the quality of the service.
Product quality
Choose a company that works with quality equipment, such as solar panels and inverters from recognized brands. Ask where the products come from and if they have certifications that guarantee efficiency.
Technical support and service
Check that the company offers reliable technical support, both during and after installation. It's important that you can rely on the team to solve any problems. See how they communicate with the company and whether they answer your questions quickly.
Guarantee offered
The guarantee is a very important point! Check how long the company offers warranty for the solar panels, inverters and the installation itself. Some companies guarantee not only the equipment, but also the system's performance over time.
Extra services
It is quite common for solar energy companies to offer additional services, such as remote monitoring of the system, regular maintenance and help in obtaining tax incentives. These services make all the difference!
See if the company carries out a personalized analysis of your energy consumption, in order to ensure that the system is exactly what you need and make the most of these extra services.
Solar energy in condominiums and residential buildings
When it comes to condominiums, one of the main advantages is the the possibility of sharing the energy generated among the residents.
This can be done through collective self-consumption, where the solar energy generated is distributed among all the units in the buildingThis reduces energy consumption from the public grid and, consequently, electricity bills.
However, to implement solar energy in condominiums, it is important to follow some specific regulations, which vary according to location. Here in Brazil, for example, the ANEEL establishes standards for distributed energy generation, which includes solar systems in residential buildings.
In addition, you need to ensure that all residents agree to the installation and understand how the costs and maintenance of the system will be managed. A good idea is to discuss and approve these points at a meeting, ensuring that everyone is aware of the advantages and responsibilities associated with using solar energy.
Which companies need solar energy the most
While some industries have a greater need to cut energy costs, the truth is that any business can benefit from this technology. But those that have higher consumption, naturally generate more significant savings.
Find out which sectors could benefit most:
Industry
Factories and industrial plants often have very high energy consumption. Solar energy will significantly reduce operating costsIt also takes advantage of the large spaces available for installing solar panels.
Agribusiness
In the countryside, solar energy is perfect for powering irrigation systems, lighting and equipment in areas where conventional energy is expensive or difficult to access.
What's more, agribusiness is increasingly concerned about sustainabilitySolar energy is a great way to adopt greener practices.
Trade and services
Supermarkets, shopping malls, hotels and other businesses that spend a lot on electricity, mainly for lighting and air conditioningIn addition, they can save a lot with solar energy.
Public sector
Schools, hospitals and government buildings can also benefit from adopting solar energy, saving resources that can be invested in other important areas. And when the public sector leads by example, encourages society as a whole to follow suit.
Solar energy is for everyone!
Although some companies have a more urgent need to cut energy costs, any sector can take advantage of the benefits of solar energy. And not just companies! Installing solar panels at home is also an excellent investment, saving money and contributing to a more sustainable future.
Solar energy is the future. And that future is already available to everyone, whether in large industries, small businesses or homes. The savings on electricity bills and the positive impact on the environment make solar energy a smart choice for those who think in the long term.
Solar energy and sustainability
In addition to boosting the economy, solar energy also promotes sustainability, making a major contribution to the environment. reducing greenhouse gas emissions and preserving natural resources.
Let's understand a little more about how this clean energy source makes all the difference to the planet.
Reducing greenhouse gas emissions
One of the main advantages of solar energy is that it generates electricity without emitting carbon dioxide (CO2) or other greenhouse gases during operation. Compared to non-renewable energy sources such as coal and oil, which release large amounts of CO2 in the atmosphere, solar energy is a much more environmentally friendly option.
For example, a typical residential solar energy system can prevent the emission of around 1.5 tons of CO2 per year, which is equivalent to planting approximately 25 trees every year. On a global scale, the widespread adoption of solar energy has the power to greatly reduce global carbon emissions, helping to mitigate the effects of climate change.
Preservation of natural resources
Non-renewable energy sources, such as coal, oil and natural gas depend on the extraction of finite natural resources which, once used up, cannot be renewed.
Furthermore, even the extraction and use of these resources have significant environmental impacts, including the destruction of ecosystems, air and water pollution, and soil degradation.
Solar energy, on the other hand, harnesses an inexhaustible resource: sunlight. The sun provides more energy in one hour than the whole of humanity consumes in a yearis an abundant and sustainable source of energy.
Comparison with non-renewable energy sources
When we compare solar energy with non-renewable energy sources, the differences become clear:
- Coal: produces around 2.2 tons of CO2 per megawatt-hour (MWh) of electricity generated. Coal mining also destroys vast areas of land and pollutes waterways.
- Oil: emits approximately 2.3 tons of CO2 per MWh and is associated with oil spills and environmental contamination.
- Natural gas: although it is less polluting than coal and oil, it still emits around 1 ton of CO2 per MWh, as well as contributing to the release of methane, a potent greenhouse gas.
In contrast, solar energy produces zero direct CO2 and does not cause significant damage to the environment during operation.
Is it worth investing in solar energy?
Investing in solar energy is a worthwhile choice. As well as saving money, you'll be contributing to a more sustainable futurewith fewer harmful gas emissions and preservation of natural resources.
It is flexible, efficient and works in different situations, whether in homes, condominiums or businesses. With low maintenance and the ability to generate energy even on cloudy daysThis makes it an economical option for your day-to-day life.
In addition to the positive impact through the use of solar energy in homes and businesses, we believe that it is necessary to change human dependence on non-renewable energies to clean energy sources, which is why we offer real warranty and the best after-sales service in Brazil.
The BYD photovoltaics are applied in solutions of small, medium and large for residential, commercial, industrial, rural, investors, concessionaires energy, and many others.
Learn more about how BYD is leading the future with innovation and sustainability. Discover our complete solutionsfrom solar energy to electric vehiclesand be part of this global revolution!
