What criteria must be observed for the association for own consumption?

A ZEV shares a single connection to the public power grid.
Objects adjacent to plots may be combined to form a ZEV. All but one grid connection must be removed.
The installed output of the photovoltaic system (kWp DC output) is at least 10% of the installed connection output of the ZEV to the power grid.
The supply between the participants is via private lines, no use of the public grid.
The solar power must be produced on the same or an adjacent plot and must be located behind the same grid connection point.
A ZEV always starts at the beginning of each month.
The formation of a ZEV must be requested from the grid operator at least three months in advance.

More information can be found here.