Classification and cost of photovoltaic systems: non-integrated system, integrated systems, partially integrated system

The non-integrated photovoltaic systems are so-called because in fact they do not integrate harmoniously with the structures or surfaces that host them. These systems generally made on the ground or even on the structural parts of buildings such as terraces, strata, shelters and / or elements of street furniture.

The solar panels are installed in a non-coplanar surfaces on which they are attached. Generally have a greater impact from the aesthetic point of view and therefore are not pleasing to the eye. For this type of installation, the tariffs are lower than the types integrated or partially integrated.

Partially integrated systems

Photovoltaic systems are when partially integrated photovoltaic modules do not replace the materials constituting the support surface and are installed on flat roofs and terraces, in a coplanar manner, for example on the roof cladding.

They can be considered partially integrated even those panels installed for example on the terrace which is surrounded by a balustrade which partially hides the photovoltaic panels. Generally partially integrated photovoltaic systems are used on buildings or parts of them that are already in place.

Integrated building

Photovoltaic systems are fully integrated constituted by a set of modules that integrate fully with the architectural structure. It 'obvious that it is easier to realize this kind of system when you are still in the design phase of the building as we can better assess the kind of impact and the best solutions.

Photovoltaic systems are fully integrated when:

 modules replace the coating materials of roofs, roofing, facades of buildings and buildings, thus having the same inclination and architectural functionality

 modules and their support systems form the roof structure of canopies, pergolas and carports

 modules replace the transparent or semi transparent façades and skylights, providing natural lighting of the interior of the building

 modules replace part of the sound-absorbing panels of the acoustic barriers

 modules and their support systems constitute breaker sun

 modules replace or supplement the window panes

 modules constitute the structural elements of shutters


How much cost to adopt a photovoltaic system

But the real question that everyone is looking for answer is: "what is really making this choice and what is the return on investment resulting from the adoption of a photovoltaic system?"

To answer this question, we present the data derived from field studies conducted ENEA: the ABC of photovoltaic (data February 2011).

A photovoltaic system "average" for the consumption of a family of four persons (which also owns an air conditioner) can produce 3 kW, has an average size of 30 square meters with polycrystalline silicon modules (which are the most economical).

For clarity, we are talking of a photovoltaic system "partially integrated" family type (non-shared) whose photovoltaic solar panels can be placed on the roof of the house or on the roof of the attic. Recall also that the cost of the system varies according to the quality / type of photovoltaic module installed (+ / - 30%).

The average cost of the plant is 7,000 € per kW (plus VAT at 10%). For all we must then estimate an average cost of about € 23,100.

Must not forget that the "productivity" of the PV system varies greatly depending on the area where it is located the plant itself. This factor also affect payback period ranging from about 10 years North up to get off a little more than 7 for the South The same installation, in fact provides a quantity of electrical energy that varies significantly, from 3,300 kWh per year for the North to 4,500 for facilities that are located in the South




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