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Do you know that: structures in photovoltaic installations must be resistant to snow and wind loads?

Nov 24, 2021Constructions, Expert advice0 comments

Photovoltaic installations are becoming more and more popular. We choose them not only because it is an ecological solution, but above all because of the savings it is supposed to bring. However, hardly anyone realizes that the wrong choice of assembly system and faulty assembly can end in disaster. Structures for photovoltaic installations are exposed to extreme weather conditions and are subjected to heavy loads such as snow, wind, UV radiation, and temperature fluctuations. The values of these loads depend on the climatic zone in which the installation is located. In this article, you will read how choosing the right installation system and a properly trained contractor is a way to avoid problems in the future.

Many investors are convinced that if something is the same, why overpay? But is it really the same? Let’s take a closer look at structures for photovoltaic installations.

Harmonized standard for photovoltaic structures

The most important standard that applies to photovoltaic structures is the European standard EN 1090. It is addressed to manufacturers of steel and aluminum structures in the European Union and countries outside of it that want to sell their products to the Member States.

Unfortunately, the low prices of the offered solutions very often result from very poor quality components and, above all, they do not meet the required standards. Why? Testing in an accredited laboratory costs a lot, even several hundred thousand. Even for a large producer it is a considerable expense, therefore only a few perform tests and obtain confirmation of compliance with the standard in the form of a certificate. Only a few Polish producers have obtained the certificate of an accredited body, and others are trying to stretch the facts. An example is one of the large wholesalers in Silesia, which uses a welding certificate, presenting it as a certificate for photovoltaic structures. You only need to check what the certificate is for.
Unfortunately, there are very often “Janusz Photovoltaics” for which common sense obscures the desire to earn a quick income. They buy materials from different producers and put it together themselves into one assembly system, unknowingly becoming a producer (Art. 449 of the Civil Code), and even worse, they invent systems that endanger the user. Desperate posts appear on internet forums every day asking for your opinion or help. What do you think, the reader, about the installation below?

Plane or what? A kite rather. When will it fly away? The pilot of the 2nd airframe turned out to be a PV installer and wanted to fly away with the building. Is it used to ventilate the hall? And then, and because of me, the roof blew. Chu ……. You care. Not yours, not your problem …… These are just some comments from the group https://www.facebook.com/groups/grupafotowoltaika

How does this affect the consumer?

This is not an installer problem anymore. After all, he will close the business in a moment, change the phone and avoid responsibility. Unfortunately, there are often companies employing workers from across the eastern border, very often offering panels to be installed by people with no qualifications, operating on the “must be the cheapest” principle, otherwise they will not sell. Investors are to blame for this, because the only selection criterion is the lowest price instead of checking the quality of workmanship and references. You have to be aware that you can’t get the lowest price on good materials and by well-trained fitters. This may result in a number of irregularities, which include, among others:

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Nieprzestrzeganie zasad bhp w trakcie montażu,

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Stosowanie niskiej jakości paneli pozbawionych atestów i znaków jakościowych,

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Wykorzystanie słabej jakości przewodów i innych pomniejszych elementów instalacji elektrycznej mogących być w przyszłości źródłem awarii,

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Zastosowanie nieodpowiednich systemów montażowych uniemożliwiających dobre przytwierdzenie paneli do powierzchni dachu,

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Niewłaściwy sposób przytwierdzenia konstrukcji do dachu,

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Zły dobór typu i mocy inwertera oraz niejednokrotnie jego niska sprawność

This is mainly due to the lack of knowledge among investors about photovoltaics, which is why the industry is full of entrepreneurs who promise “golden mountains”. They often offer very low-quality products, bend information about their efficiency, or give incorrect calculations regarding the payback period of the installation, and propose oversized solutions that go beyond the needs of customers. Savings on labor are also time savings, so makeshift solutions are used. Unreliable installers assume that if you can’t see something, you can do it for “art”. Unfortunately, such an action can have far-reaching consequences later.