*4.1. PV Plant*

Since the first PV plants became commercially available on the market the cost of PV components, installation and maintenance has changed notably. In particular, in the last years there has been a constant decrease of the costs on the world market.

In this study, only residential PV systems with 6 kWp of power have been taken into account. This choice is motivated by the fact that the use of DRS is very interesting in residential PV plants, where the probability of installation of a fixed obstacle is high in respect to other type of plants. Indeed, four years after the installation, a fixed obstacle reducing by 35% the total power is assumed to appear. This value of reduction has been demonstrated in study [20]. Moreover, in order to carry out a complete analysis among different locations of installation taken into account, an installation of the PV plant between 2013 and 2014 was assumed, considering that in those years there were incentives in all the countries.

Regarding the cost of the PV plant, the average estimated price for this type of plant is about 2500 €/kWp (included installation). In Table 14 the economic data about the PV plant under test are summarized.


**Table 14.** PV plant data.
