Photovoltaic panels are an investment that more and more household owners are opting for. They are an interesting alternative in terms of electricity savings as well as environmental impact. However, is it a solution without drawbacks? We will try to answer the question of whether photovoltaics are ecological and whether they have environmental benefits. We invite you to a short lesson entitled. "Photovoltaics and ecology".
Photovoltaic panel production and ecology - what is worth knowing?
Photovoltaic installations are quite popular because of the savings on electricity bills, which you only notice in the future, usually a few years after the investment, as well as the ecological performance. Photovoltaics are based on converting solar energy (which is one source of RES) into electricity. This mini-generation plant uses renewable raw materials, which is considered one of the greatest environmental benefits of photovoltaics. Nevertheless, there are some doubts.
In order to get photovoltaic panels onto the roof of your house, they first have to be manufactured, and the production process may not necessarily be that eco-friendly anymore. With any eco-alternative, whether it is panels or, for example, electric cars, it is worth paying attention to the life cycle of the product. This covers the period from production to operation to disposal. Each of these leaves a carbon footprint behind. As you can guess, this is not zero in the context of photovoltaics either. This life cycle assessment consists not only of the degree of greenhouse gas emissions into the atmosphere, but also of heavy metal emissions, resource availability and, finally, the payback time of the energy expenditure. 
To what extent does the production of photovoltaic panels affect the ecology?
Demand for electricity is high and photovoltaics are, among other things, a solution to the problem of high electricity prices. However, the production of solar panels also requires the consumption of some energy. So how are they produced? The main step here is the processing of silicon, during which, unfortunately, toxic substances are produced. Nowadays, thanks to technological developments, panel production does not produce as many of these, but this is still not a satisfactory result. Not least the fact that about half of the panels are produced in China, where the main source of energy is still coal from conventional power stations.
The cost of producing photovoltaic panels is also worth considering. And here too, new technologies are bringing benefits. According to the US National Renewable Energy Laboratory, by optimising processes, the production cost of type III-V solar cells can drop to USD 0.20-0.80/W. The only drawback remains the rather high transport costs.
All these steps affect the links between photovoltaics and the environment. However, what matters overall is the energy payback time mentioned earlier. In the context of PV panels, this is approximately 1.5 years. This means that after this period they will be fully emission-free, so the environmental impact of photovoltaics can be assessed positively.
What chemical agents during the production of photovoltaic panels are produced and affect the ecology?
The manufacture of PV panels is not without environmental impact. Initially, quartz is refined into elemental silicon, which is then transformed into metallurgical silicon and finally into polysilicon. High temperatures are used for this, and the whole process - until a few years ago - required the use of huge furnaces (whose power source is electricity). Unfortunately, some harmful waste is produced here, namely silicon tetrachloride, which requires special disposal.
The decommissioning process of the photovoltaic installation itself should be kept in mind. The lifetime of the panels is set at around 30 years. After this time, they should be recycled, although such a process is not particularly easy and certainly not a little harmful. PV panels are treated as special waste due to the production of toxic substances such as lead, gallium, selenium, indium, cadmium and tellurium. This does not mean, however, that PV panels are harmful to the environment - the above information is merely evidence that the solution is not environmentally clean. However, the above substances are not as toxic as, for example, aluminium.
Now you know the relationship between photovoltaic panels and the environment in relation to the benefits of renewables. Although they are not emission-free throughout their life cycle, they can definitely be considered a green solution.
