Today, PV installations are only promoted via the non-recurring remuneration (NRR) that covers a maximum of 30% of the capital costs relevant at commissioning of a reference system. Even so, building a solar installation is almost always profitable, since power produced by solar on one’s own roof is cheaper than electricity drawn from the public grid.
It should be noted, however, that prices paid for power fed into the grid are very low (www.pvtarif.ch). This means that the higher your self-consumption rate is, the more your solar system will be profitable.
At the beginning of 2018, Switzerland launched a new investment instrument called «Private consumption community» (ZEV). It enables not only several apartment buildings, but also adjoining plots of land to form communities that act as a single customer to the energy supplier. Within a private consumption community, individual current measurings no longer need to be done by the energy supplier. Swissolar’s guide to private consumption shows what needs to be taken into account when forming a ZEV.
There are 3 main steps to achieve a high rate of self-consumption:
Appropriate dimensioning of the PV installation: 20-30% rate of self-consumption
Power consumption adjusted to production, e.g. heat pumps: 30-50% rate of self-consumption
Installing a battery storage: more than 50% rate of self-consumption