Photovoltaics , actually photovoltaic panels convert solar energy into electricity. The solar set is connected to the current building electrical system. We simply have cheaper electricity in our sockets. Due to the lower price of electricity, it can be used for heating water and the house. Obtained electricity can be consumed on a regular basis, stored or sold – depending on the type of photovoltaic installation. Considering the profitability of photovoltaics, it should be remembered that together with the photovoltaic system we “buy” energy reserves for many years. From the moment the installation is started, every day we get free electricity from the sun!
Profitability of solar farms and its advantages:
- Photovoltaics are free electricity from solar energy.
- Solar farms have over 25 years of production warranty.
- Solar installation is maintenance-free. Nothing needs to be changed.
Solar panels – profitability.
Why is it worth investing?
The profitability of solar panels is constantly increasing. Solar panels provide over 25 years of unattended operation, generating free electricity every day. In addition, technological development and increased interest in renewable energy meant that since 1973 solar panels have been reduced by 99%. PV micro plants up to 40 kW do not require a special permit. In addition, the operator is required to connect them to the network, if the power of the installed set does not exceed the power of our electrical connection. By 2020, Poland is required to switch partially to Renewable Energy Sources, thus limiting the burning of fossil fuels that pollute our environment.
Depending on the size of the PV installation, the amount of electricity produced varies. 1 kWp photovoltaic panels facing south will generate around 900-1100 kWh of electricity in Poland during the year. The cost of installing solar panels varies considerably depending on their type (polycrystalline or monocrystalline) and the quality, brand and quality of the inverter, and the level of assembly complexity. It can be assumed that a typical family needs 2500-3500 kWh per year. If you want to produce so much energy from photovoltaic panels, you need to prepare for an expenditure of approx. 18,000 to 25,000 PLN. If we do not have sufficient funds, we can always use the financial assistance offered, e.g. from the Prosumer program.
People who wonder if solar farm pays off should take into account that solar panels do not generate costs associated with the operation of the installation. Solar energy is completely free and after installing the solar installation we do not have to worry about the costs associated with the use of electricity. Photovoltaics pay for themselves after about 9-10 years, while using the subsidy shortens this period to about 6-7 years.
Solar cells – working principle
The principle of operation of photovoltaic cells is that a photon (minimum unit of light) falling on a photovoltaic cell is absorbed by silicon and knocks out the electron from its position forcing it to move. This movement is just the flow of electricity. By using a pn type semiconductor junction it is possible to connect this process with the electron circulation in the power grid. Photovoltaic cells convert solar energy into electricity, unlike solar collectors that produce heat.
Photovoltaic cells – the main benefits
The main advantages of solar cells include savings on bills and environmental protection, but also energy independence. We have our electricity and we don’t have to pay attention to the rising costs of electricity. By investing in solar farms, we contribute to reducing air pollution while saving.
Due to the increase in demand for solar panels, more and more engineers are working on better solutions to reduce production costs and increase their efficiency. Once we have the installation and decide to sell energy, it is worth considering net metering , which allows us to use the network as a battery without additional costs (for installations reported to the power plant after 01.01.2016).
It consists in the fact that surplus energy, which we do not consume on a regular basis, is put into the network (“we store”) and we can recover it when the need arises. We settle accounts with the energy supplier on a semi-annual basis. When it turns out that we have used as much as we have produced (zero balance) then we bear the costs only for operating the network. If our production is not sufficient and we draw electricity additionally from the network (negative balance – too low production) then we have to pay extra for the price of the current difference, while if our production is greater than consumption, we can sell the surplus. The electricity produced by the PV installation can be used for everything – also for heating water. Another advantage is that using net metering, we have almost no losses in the transmission of electricity.Discover other advantages and disadvantages of solar farms …
Solar panels – saving money and the environment
Solar panels are an excellent investment for people who want to save. Photovoltaics are not only benefits for the environment, but also for the pockets of users.
Firstly, by choosing the right size of installation, solar panels will produce enough energy to meet the needs of users and electricity bills will be reduced to almost zero. Thanks to such a solution, price increases for electricity cease to be dangerous. Solar panels provide users with independence and energy security.
Secondly, since the installation is started, the energy produced by solar panels is free, the installation does not generate any operating costs. Solar farm brings about 10% of the annual rate of return, which is 2.5 times more than a bank deposit!
In addition, the new RES Act has created new savings opportunities such as:
Thanks to this, solar panels pay off even more. For example, using guaranteed tariffs not only saves you on electricity bills, but you can also earn money by selling surplus energy to the grid at a fixed rate for 15 years.
Thirdly , solar panels save our environment. Photovoltaics do not emit CO2 or any other harmful substances. Solar panels also do not cause noise or vibration, in this respect they are a better solution than wind turbines.
Where are solar panels installed?
Photovoltaic panels are mounted mainly on the roof or on the ground so that they are directed to the south and make the most of sunlight. Installation of a solar installation should be preceded by at least a common-sense analysis of shading and the possibility of avoiding its impact on the solar installation. South-facing roofs are optimal, but not the only place where solar installations are installed. Booms, fences and flat roofs are also suitable for installation assembly.
Already at the planning stage of the solar installation, it is worth choosing the optimal place for it, where the energy yield will be the highest, and the installation itself will not interfere with the use of the area in any other way. Solar farms are usually located in open ground, directly on the ground or outriggers. There are more possibilities for home solar installations.
It is only necessary to find a stable substrate in a sunny place. In Poland, their performance is highest when directed south (with a possible deviation of up to 30 °) at an angle of about 30-60 °. The optimal solution is to install solar panels on a sloping roof facing south. Then, at the same time, they remain well sunny and do not take up additional space. In addition, if the solar installation is already taken into account at the house construction stage, its costs can be significantly reduced, and the solar panels themselves will be incorporated as part of the roof.
Installation of solar installation in other places can also be profitable. Thanks to the use of extension arms, the solar installation can be installed on a flat roof, fence, non-residential structures or directly on the ground. However, because it is optimal in Polish conditions to direct the solar panels to the south, the northern roof slope or building wall will not be a suitable place for solar installation. An installation set too low will, however, be shaded in the morning and evening hours, which will generate slightly less energy.
Therefore, ground photovoltaic installations should be raised to a height of about 1.5 – 2.5 m, so they will also not take up so much space on the plot. Outbuildings are often chosen for solar panels .