Photovoltaics – where to install. Photovoltaics is a relatively new topic, although it is also quite intensively discussed in various media. Despite this, there are a lot of questions that, let’s say, are not standard, although in fact they are very important questions. For example, the question of where to mount photovoltaics may be considered stupid by some, but the truth is that mounting a photovoltaic installation on the roof, although it is most often implemented, does not have to be the only solution and, of course, it is not always the best solution .
We will look at this topic, which is where to mount solar panels, and let’s also consider if there are any other topics that may be obscure, although from the layman’s point of view, could be completely obvious.
Installation of photovoltaics on the roof
Solar panels are usually installed on the roofs. Why is this so, there are actually many reasons, but probably the most important is the one that says that there is simply not enough space on the property where such a photovoltaic installation could be installed. Therefore, the roof is actually the most reasonable solution. The truth is, however, that not always the installation working on the roof works optimally.
This is especially true for photovoltaic installations that are installed on existing buildings. Of course, this does not mean that every new building will have a photovoltaic installation at full capacity, but we will get to that in a moment.
In order for photovoltaic cells to work at their full power, i.e. in the full range of possibilities, we must actually be able to mount these panels in the best possible way. The panels of the photovoltaic installation should preferably be at an angle of 45 degrees and preferably towards the south-west, because in our latitudes this type of setting causes the panels to work the most.
Now let’s consider whether any roof will be able to meet these eloquent ones. Of course not. Depending on, for example, the region of Poland, the roofs are more or less slanted, and the orientation of the building along the sides of the world is also not always optimal. Of course, if there is no other solution, we mount the panels on the roof in the best possible configuration, but this does not mean that the panels are mounted on the roof because it is always best.
Installation of the ground installation
Installing a photovoltaic system on the ground has many advantages. First of all, if we actually have enough land to implement such an installation, we can choose with much greater freedom where these panels will be installed. We will be able to install them in the right position according to the directions of the world, as well as at the right angle. An additional issue concerns the maintenance and service of such panels.
If, for example, one of our panels is damaged and for some reason stops working, or, for example, photovoltaic cells are damaged, then in fact, if we have installations mounted on the roof, this becomes quite a problem. If, for example, the panel is simply defective and it is all covered by some kind of warranty, then most likely the company that sold and installed the panels will cover the costs, but if, for example, the panels were mechanically damaged and the panels were not insured, well then we will have to cover the cost of the boom work out of our pocket. This is why ground-based installations are superior in many ways.
In addition, there is an issue here that, for example, in winter, if a larger layer of snow falls, then most likely the panels will be under the snow and on the roof, it would be difficult to clear them of snow, while at ground level, we can do it at any time.
Which photovoltaic cells to choose?
One of the questions that also arises quite often is: what photovoltaic cells should be installed? First of all, we must pay attention to the fact that we have two main types of photovoltaic cells, they are monocrystalline cells and polycrystalline cells. Monocrystalline cells are characterized by the fact that they have a much higher efficiency and we can actually recognize them visually by the fact that they are black. Polycrystalline cells are dark blue and are obviously less efficient. Most often, when we asked a question to a person who would like to install photovoltaic cells, they would of course answer that they prefer better monocrystalline cells, but the truth is that the cost we would have to incur to install monocrystalline cells is disproportionately higher than how they are more efficient.
In fact, monocrystalline cells installed by private individuals should be installed when there is some economic justification for doing so, for example in a situation where we have to install a photovoltaic power plant on the roof, and the roof area is too small for such an installation made of panels using polycrystalline cells was efficient, then it actually pays to install monocrystalline cells.