Table of Contents
Advertisement
3
Function, scope of delivery and technical
parameters
3.1
Function
The VARTA element battery storage system is a storage system for
operation in a 3-phase building grid, which offers the option of
connecting a separate grid-connected photovoltaic system. This
must be a generating unit which supplies to surplus rather than to
full feed. There is also provision for storing renewable energy, for
example from small wind turbines or other CHP system energy
sources.
The VARTA element system is used to increase the share of
private consumption and the efficiency of a photovoltaic system. If
the photovoltaic system generates more electricity than
immediately needed, it can be stored temporarily in the energy
storage system. The electricity will be fed into the building grid, as
soon as the consumption rises again above the electricity
generated by the photovoltaic system.
The VARTA element system is integrated into the building grid as a
3-phase AC connection and operates independently of the
photovoltaic system. A current sensor controls the charge and
discharge processes of the energy storage system. It is mounted in
the fuse box, directly behind the consumption/feed-in meter, and
measures all incoming and outgoing currents.
If the current sensor measures outgoing currents in case of
available free charge capacity of the energy storage system, it will
be charged. During the process, the battery inverter inside the
VARTA element system converts AC to DC and charges the
battery modules. If the maximum charge capacity is reached, or the
solar electricity exceeds the maximum charging current, the surplus
solar electricity is fed into the public grid. If the photovoltaic system
Subject to modification!
Updated 10/2017
25
Advertisement
Table of Contents
