In this section, we try to answer as clearly as possible the questions we have been asked.
The photovoltaic transforms the sunbeams into continuous electricity while the thermal absorbs the heat of solar radiation to transmit it to a fluid (e.g. to heat water). The usefulness of these two technologies is complementary because the first one lights us while the second heats our water.
The average consumption of a Swiss household of 4 persons is 3'500 kWh, which corresponds to approximately 25 m2. It can obviously vary strongly according to lifestyle. The best way of knowing it is to look at your SIG invoice by means of this link: http://www.mieuxvivresig.ch/popup4.lbl?html=facture%20consommation%202&true
In a general way, shaded areas are to be avoided and a good orientation of the roof is necessary.
You can expect a yearly production of between 150 to 160 kWh per m2 for a surface well exposed to the sun.
A photovoltaic plant lasts between 30 and 40 years.
Yes, in order to make this possible, Yellowprint only works with manufacturers of photovoltaic panels that are part of a recycling network.
Between 12 and 18 years according to the size of the photovoltaic power plant, and without taking into account potential tax savings.
Yes, any power plant located on your roof can be entirely deducted from your taxes, both at the cantonal and the federal level. It is sufficient to register the expenses incurred in your tax declaration, as one does for the maintenance of the house.
The SIG buys back our energy over 25 years, thus substituting itself for the federal body " Swissgrid " which is in the process of capitalization. The registration is not automatic but Yellowprint takes care of it for you.
This varies according to the size and the complexity of the photovoltaic power plant, but it is anyway necessary to plan for at least 3 months (study, authorizations, construction site).