The method of obtaining photovoltaic energy is divided into direct or indirect, and can also be divided into passive or active.
Direct methods are methods that take energy from the sunpower solar panels and convert it into energy usable by humans in just one step. Example: Photovoltaic solar, energy is obtained when sunlight hits photovoltaic cells, producing electricity.
Indirect methods are those that require two or more steps to convert solar energy into usable energy. A good example of an indirect method is solar thermal energy, where solar energy hits a mirror, which in turn concentrates the heat in a vacuum tube through which water passes, and when it is converted to steam, powers a turbine.
Passive and Active Solar Systems
Passive solar systems are usually direct (like a greenhouse that transfers heat from the sun to the air, keeping the environment warm), while active solar systems work with the help of mechanical devices to improve collection performance. Solar (as a solar heating system, it uses a pump to force water to circulate within the system).
Is solar energy primary or secondary?
Solar energy is primary energy because it does not need to be converted or converted to work. That is, primary energy includes all forms of energy directly used from nature, such as sunlight. Nonetheless, they are easy to consume and maintain, and easy to use for developing various types of work. In addition to these benefits, primary energy sources such as solar energy do not require another alternative energy source. As a result, its cost-effectiveness is already ahead of many other sources due to the economy and simplicity of the energy production process.
How its generate solar energy
The panels work on cloudy and rainy days because they rely on the incidence of violet light, not heat, so there is solar energy when there is no sun. Yield will vary in grey days, but it doesn’t stop there. No catch at night, but there are batteries for guaranteed energy storage.
If it’s raining, cloudy, or dark that day, that doesn’t mean you can’t use solar power without the sun. Therefore, it is important to emphasize that solar energy is captured by the incidence of ultraviolet light, not heat from the sun, operating in a reduced way, but still operating. In this way, in addition to the energy capacity, the help of a professional who estimates the average amount of sunlight in the area where the installation will take place is required. Therefore, the sun’s position, the solar index of the year and the duration of the day can be used to calculate the insolation level and avoid poor performance on cloudy or rainy days.
In this sense, with the help of high-quality photovoltaic solar panels, the efficiency of the generator can be guaranteed even in the absence of sunlight, because the generation load is sufficient. However, the same thing does not happen at night, because the photovoltaic system cannot generate electricity without different light, and a distributor is required to use the electricity.
Still, solar power is one of the most economical and sustainable alternatives on the market today, with simple installation and minimal maintenance. To do this, you can simulate the cost of installing a solar system based on the chosen location, just enter our Solar Portal simulator and check it quickly and practically. In this way, you can estimate the average cost of a PV installation, the number of panels, the annual solar power generation, the area required for the installation, and the average weight of solar panels per square meter installed.
Key Benefits of Solar Energy
Solar power systems use clean, pure energy from the sun. Installing solar panels in your home or business helps fight greenhouse gas emissions and reduce our reliance on fossil fuels like oil.
- A standard 6kWp PV system will avoid polluting gas emissions for its entire 30-year lifespan, equivalent to planting trees on 10 football fields!
- The same system can save water in 6 Olympic swimming pools compared to a hydroelectric system.
- Save 79 tons of coal.
- Save 500,000 km on gas.
The benefits of solar energy for our pockets:
Solar power is a great way to save money! That’s right, those who use solar thermal, photovoltaics, and even natural lighting will save thousands of reais (R$) per year.
For example, a 6kWp PV system will save its owner around BRL 250,000.00 over its 30-year lifespan. Yes, the initial investment is high, but the amount the system will save you over its lifetime exceeds that investment.
Where can I find out more about what solar energy is and how it works?
Portal Solar provides a wealth of information on what solar energy is and how it works, so you can browse the various sections of the site to learn about its origins, pros and cons, types of PV systems, and more!
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