With energy technologies from the Sun you invest in a cleaner environment. Anyone who purchases a solar energy installation uses free energy from the sun. Saving on other types of fossil sources, that would otherwise be used for generating and supplying electricity by the energy company.
You contribute to the environment. That fact may already be sufficient for many people to start using solar panel installation for a down grade off your electricity bill.
A solar systems works on the light of the sun. So even with a wholly or partly cloudy sky they already generates electricity.
It is best to place solar panels on the south at an angle of 30 degrees with the horizon. It’s okay to deviate from that. A monocrystalline panel of, for example, 300 Wp (approx. 1.7 m2) produces an average of 270 kWh per year.
The electricity from a photovoltaics PV system (including panel cost and accessories) is more expensive than the regular electricity that the energy companies supply. On the other hand, you invest in a cleaner environment.
A PV system with a panel surface of 1 m2 saves 42 kg to 56 kg less CO2. Otherwise that’s emitted into the atmosphere per year. CO2 is a significant cause of the greenhouse effect. That is, if you are using standard grey electricity.
Nowadays you can also buy green electricity from your electricity company at almost the same price as standard electricity. This possibility has unique advantages in addition to generating solar energy yourself. You must not exceed a specific purchase price for solar panels. Otherwise, it will become economically unprofitable.
There are various considerations when it comes to saving on the use of solar energy. The user ultimately determines what he or she considers essential.
However, with the latest solar technology, Solar2power can also provide you with larger installations with a 20 or 25-year warranty. Which will repay in several years (less than ten years) from the electricity company’s power.
After that, you indeed have free energy. In practice, it is often impossible to get your entire electricity demand from PV modules with the modern comfort you desire, even if you could and could fill your entire roof. You, therefore, remain partially dependent on the electricity company.
As a producer, you have competition in saving on fossil fuel if you can also get green energy from an provider. After all, you do not have to invest for it yourself if you conclude a contract for renewable energy. It is, therefore, best to make a combination of your PV modules with the addition of a contract with an provider for green energy.
The surplus electricity is returning to the grid. And therefore used by others as green power. Later in the day, you consume it yourself, also in the form of green electricity — a perfect collaboration.
It is very beneficial if you need electrical energy in places where you cannot get it from an energy company. At that moment, all economic saving theories fall away. It is then only about how you can generate power. This can be done with an engine generator (fuel consumption), or in the form of hydropower, with a wind generator or with a solar energy PV module.
All these installations require investment and maintenance and deliver a certain number of kilowatts at a specific time. You ultimately decide what you have left for that and which form of energy is best for you in the situation that applies to you.
Especially in this situation, it is recommended to start using solar panels, although the energy supplied is expensive kilowatts. On a boat, camper, caravan or in a garden or holiday home, in a meadow or a light pole without or far away from a connection to the power grid, panels are well usable.
Solar panels can be used to convert sunlight directly into electricity (“solar to power”). We call this process the photovoltaic effect. The official name for a electric generating panel is PV panel, via the English “photovoltaic panel”.
A PV panel or solar module consists of several small PV cells that are connected. Each cell is made up of wafer-thin layers of semiconductor material between which – under the influence of sunlight – a voltage difference occurs.
The heart of a module is, therefore, the cell, made of silicon. Silicon comes from quartz sand by melting and cleaning. Then rectangular or cylindrical raw silicon cubes arise, and cut into slices.
By applying a bottom and topside in a target manner and by using small silver strips, a correctly functioning solar cell is made. To which a power consumer can connect.
If energy-rich sunlight (UV and Infrared radiation = photons) now falls on this cell, the electrons in the silicon crystal lattice are set in motion and circulate through the power consumer. We have thus generated direct current and direct voltage (Volt). Hence the concept of photovoltage.
Depending on the crystalline silicon in the surface, a difference between monocrystalline, polycrystalline and amorphous is going to exists.
The different crystalline structures give a different yield. The efficiency of a solar cell determines which part of the solar energy is emitted and delivered as electrical energy. A module with low efficiency needs a larger surface area if you compare to a blade with higher efficiency.
A panel of 1 m2 surface captures 1000 W in Portugal Algarve. If the ability is 21%, that 1 m2 produce electricity energy of 210 Watt. The remaining 790 watts is lost in the form of heat.
If you for example place that panel in a closed cabinet behind a glass plate. The residual energy of heat could is usable in contact with air or water. Which would make the total efficiency much higher.
The amorphous solar cells are known from, for example, a pocket calculator and watches. They are usually dark, almost black. However, the spectral sensitivity is broad.
Therefore, they provide more current even under adverse weather conditions than the other types of solar cells. Because of the more straightforward production method, they are the cheapest.
The size of the solar cell can vary. Typical dimensions are 152 x 152 mm or half or one third thereof. These cells are also the most expensive.
There are also solar cells from another material with higher efficiency. These cells are from gallium arsenide. They use them experimentally in solar cars for record attempts and space travel. The price is priceless for normal application.
The solar cell can generate a direct current in accordance with the sun’s radiation capacity ( nuclear fusion ). The voltage is different. The solar cell also supplies energy at very low radiation levels.
You can compare it with a bucket, that first has to fill up. The liquid level in the bucket first gets higher and higher. As soon as the bucket overflows, water will only flow out of the bucket.
This is also the case with the solar cell. The inflowing energy first fills the empty places in the cell. The voltage rises from zero to the maximum.
As soon as it reach the maximum, the cell “overflows”. An electric current can only flow, which becomes increasingly stronger, the higher the solar radiation.
If the radiation is half as strong, it generates half of the flow. The voltage in the solar cell, therefore, decreases as the current increases and is lowest with the short-circuit current. The maximum power is when the current ( ampere ) and voltage is maximum.