Advisable to install a photovoltaic system? A quick guide with concrete examples and economic evaluations updated whit the Fifth Energy Bill
As it makes a photovoltaic system? This is one of the biggest questions that those who decide to install a photovoltaic system arises. No doubts about the sustainability of photovoltaic or on the many critical issues related to the installation of larger plants on land (which, we like to remember, we are strongly opposed) ... it makes, we want to know. In this article we try to give an answer for a moment of the classic depends more elaborate with which they are generally paid that kind of talk.
On 12 July 2012 the roof was reached 6 billion, which marks the end of the Fourth Energy Account and the beginning of the new incentive system. In compliance with the technical times, the starting date of the new incentive system called Fifth Energy Bill has been scheduled for 27 August 2012.
Plants with a capacity not exceeding 12 kW * directly access tariffs for power plants greater is instead required the registration in special registers to fit within the maximum limits of indicative annual cumulative cost (140 million euro for the first register, 120 million euro for the second and 80 million for those later).
The Fifth Conto Energia two items that enhance incentives for twenty years is the energy produced and poured into the network - all-inclusive tariff, determined on the basis of the power and the type of plant identified - that the energy produced and consumed internally - premium rate for the share of net production consumed on site.
Each plant and each user have different characteristics and it is difficult to generalize. To provide some data in this article will be taken as an example a household in central Italy that has adequate coverage exposed to solar radiation (pitched roof, floor, etc. ...).
A photovoltaic system from 3 kW peak installed in Rome can aspire to produce at least 4,000 kWh per year: this energy is roughly the needs of a family of 4, whose annual expenditure for the electricity bill is on average, at current prices, about 800 € per year.
Although the energy produced by the system and the user requirements are substantially the same, they are not contemporaries (think, for example, nocturnal consumption for lighting environments) depending on the lifestyle and habits of 'use only 50-80% of the energy produced is consumed internally, the rest is fed into the electricity grid and to the question whether it has taken.
The benefits attributable to the installation of a system of this type are multiple:
The Energy Services Operator (ESO) is € 0.208 (if the system is installed in the first half from the Fifth Conto Energia) for each kilowatt hour produced. In our case, the incentive results in an amount of about € 416 per year.
This is not over! In our example, the user is able to self-produce half of its electricity consumption by reducing spending in the bill to about € 400 per year.
Not only ... thanks to the premium for the share of net production consumed on site, all the energy produced than was consumed instantly and therefore is not fed into the grid, it will be exploited to € 0.126 per kilowatt hour. This adds an additional annual revenue of 252 €.
To all this must be added, if you have opted for modules produced within the European Union, about 80 € a year as an increase of the two tariffs.
In summary, they have opted for photovoltaics in our case gives the right to an annual incentive of 748 € more than halving the costs incurred for the purchase of electricity, for a total revenue of € 1,148 per year, about 23 '000 € for the first twenty years of operation.
On balance, the incentive provided by the Fifth Energy Bill is certainly less than the previous incentive scheme. If this discourse, however, is associated with a long-term trend to reduce the cost of photovoltaic modules and inverters, their stimulated by the reduction of government incentives, the profitability of a small photovoltaic system on the roof of his house is almost intact.
The average turnaround time is takes 6 - 7 years on the investment incurred for the installation of a photovoltaic field of small size.
27/07/2012
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Translated via software
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Source:
Italian version of ReteIngegneri.it