Sunny Island 4500
Installation & Operating Instructions
BWRI45-13-EE0304
- 154 -
SMA Regelsysteme GmbH
11.3 Mains Backup System with Photovoltaics
A special version of a mains backup system is shown Fig. 11.3. It is possible in this
configuration to feed the solar energy into the public grid as long as the grid is avail-
able. In case of public grid failure, the solar energy will automatically be used to sup-
ply the arising island grid. Even a discrete billing of solar energy fed into the public
grid is possible.
This type of plant configuration requires a very sophisticated plan-
ning and commissioning in order to prevent any kind of accident
with live wires that are assumed to be safe to touch. All local regula-
tions and laws must be met and the approval of the public utility
company is mandatory!