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MOST EFFICIENT SOLAR PANELS

MOST EFFICIENT SOLAR PANELS

Si le interesa la energia solar por una cuestion monetaria o de conciencia ecologica debe saber que tiene que instalar paneles solares , y que en el mercado hay muchas marcas,precio,eficiencia ect, pero como saber cual es el MOST EFFICIENT SOLAR PANELS.

MOST EFFICIENT SOLAR PANELS

Photovoltaic installations are increasingly common in the industrial sector because they allow lower operating costs, and therefore greater competitiveness, but the choice of inefficient solar panels can reduce the expectation of success.

Below we explain what to take into account when choosing and we give some examples of the most efficient solar panels on the market. For this we have taken into account the efficiency that brands offer, the years of product warranty and, most importantly, the price.

The first question that we have asked to determine the most efficient solar panels is which of them offers a higher performance according to the type of cell that form them. These cells can be  monocrystalline, polycrystalline and amorphous.

The answer is that monocrystalline modules have a higher efficiency , since the internal structure of the cells is more uniform and, therefore, presents less resistance to electronic displacement. In addition monocrystalline type-n cells have an electronic structure that favors a better use of the received light, which increases its performance.

In addition monocrystalline type-n cells have an electronic structure that favors a better use of the received light, which increases its performance.

Tips to consider

Once established that monocrystalline modules offer superior efficiency,  what advice should we take into account when buying?

It is advisable that the module is suitable for the installation in question. Therefore, it is necessary to correctly combine  the voltage and power levels according to the equipment to which they are connected . The purpose is to try to assemble the smallest number of solar panels possible (as long as it is technically and electrically feasible) as this will allow us to save on structure, assembly times, etc.

In addition, it is essential to properly choose solar panels, since a problem or defect in them means having to carry out complicated repairs (in some cases very expensive). In most photovoltaic self-consumption installations, panels are installed on the roof of the property in question (homes, industries, shops, farms, etc.).

A defect in one or several modules supposes important setbacks  for different reasons such as the replacement of the panel and the cost of the security measures to be implemented for the worker, as well as that of the machinery necessary for accessibility.

For all these reasons, it is recommended that the chosen photovoltaic module  meets minimum quality standards that ensure the amortization of the installation in the expected time  and in order to avoid all the problems that would arise in a possible corrective action, in most cases high cost. It is essential to have the  certification seal approved  by an accredited body (TÜV or similar).

Taking into account this, we will know if we need:

– Modules of  36 cells  (we could reach 150Wp (Watts / Peak), 18V Vmp (Voltage in Maximum Power), 22.5V in Voc (Open Circuit Voltage) Price range: 0.64 – 0.80 € / Wp

– Modules of  60 cells  (we could reach 300 Wp, 30V Vmp, 38V approx in Voc., Price range: 0.37 – 0.74 € / Wp

– Modules of  72 cells  (we could reach 350 Wp, 36V Vmp, 44V approximately in Voc., Price range: 0.37 – 0.72 € / Wp

Yingli solar panel with 72 cells

Price and performance of solar panels

Another issue that we have raised is the relationship between the price and performance of a photovoltaic module and its duration, that is, its real life.

Regarding the price / performance ratio, a solar panel generates an amount of energy during its useful life in a given installation, which  will depend on its efficiency and the point of degradation  it suffers. 

This means that, if a module does not meet certain minimum requirements, it could decrease its production at a greater rate than that taken into account in the study phase of the project, assuming lower self-consumption ratios than initially estimated and that the amortization of the installation will trigger.

The higher the efficiency and the lower the annual degradation, the better the price / performance ratio will be . We will also have to take into account the prestige of the manufacturer, the highest peak power ratio per square meter (Wp / m2) and, of course, the type of panel.

The higher the efficiency and the lower the annual degradation, the better the price-performance ratio of a solar panel

Regarding its duration, the guarantee of current solar panels is 25-30 years for monocrystalline and 20-25 years for polycrystalline. It is also true that there are facilities that have been in operation since the 1980s and have been in operation for up to 30 and 40 years, so in general, the real life of solar panels is unknown.

The 10 most efficient solar panels on the market

Below we highlight the 10 highest quality solar panels on the market in terms of  price / efficiency:

List classified by number of cells (60 and 72) and percentage of efficiency of each of the panels.

This list highlights the excellent price of Yingli solar panels   (0.37 € / Wp) and the highest performance of LG solar panels   (up to 22%) in the type of 72 cells.

Panels of 72 cells
Panels of 60 cells

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