Additional Requirements For An Off-Grid System; Additional Requirements For An Sma Flexible Storage System - SMA SUNNY ISLAND 4.4M Schnelleinstieg

SMA Solar Technology AG
The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for
future reference and observe all instructions contained therein.
The type label must remain permanently attached to the product.

Additional requirements for an off-grid system

Off-grid systems with Sunny Island are used to set up self-sufficient utility grids. The Sunny Island forms the stand-alone
grid as a voltage source. The Sunny Island regulates the balance between the energy fed in and energy used and
features a management system that manages the battery, generators and loads. AC sources (e.g. PV inverters) supply
loads and are used by the Sunny Island to recharge the battery. In order to be able to increase the availability of the
off-grid system and reduce the battery capacity, the Sunny Island can use and control a generator as an energy
source.
Off-grid systems with Sunny Island form single-phase or three-phase AC distribution grids.
The locally applicable standards and directives must also be observed for off-grid systems. Loads in off-grid systems
are not protected against power failure.
In off-grid systems, the maximum output power of the non-adjustable AC current sources (e.g. wind turbine system or
CHP plant) must not exceed the total power of all Sunny Island devices (for technical data, see the Sunny Island
operating manual).
The connected PV inverters must be suitable for use in off-grid systems. The power of the PV system must be
appropriate for the system (see planning guidelines "Design of Off-Grid Systems with Sunny Island Devices" at
www.SMA-Solar.com).
Only the device types SI6.0H-12 and SI8.0H-12 are suitable for single-phase single cluster systems and three-phase
multi cluster systems (see planning guidelines "Design of Off-Grid Systems with Sunny Island Devices" at www.SMA-
Solar.com). Several clusters may only be interconnected if the Multicluster-Box 6 / 12 (MC-BOX-12.3-20) / 36 is
used.
Additional requirements for an SMA Flexible Storage System
The SMA Flexible Storage System is a battery storage system and optimizes self-consumption of PV energy by the
following measures:
• Intermediate storage of excess PV energy with the Sunny Island
• Visualization of PV system data in Sunny Portal
The SMA Flexible Storage System does not form a battery-backup grid in the event of utility grid failure (for installation
of a battery-backup system, see the system description "SMA FLEXIBLE STORAGE SYSTEM with Battery-Backup
Function" at www.SMA-Solar.com).
The SMA Flexible Storage System must only be used in those countries for which it is licensed or in those countries for
which it is approved by SMA Solar Technology AG and the grid operator. The grid configuration of the utility grid
must be a TN or TT system.
Grid feed-in and purchased electricity are recorded with an SMA Energy Meter only. An SMA Energy Meter does not
replace the energy meter of the electric utility company.
Single-phase clusters are not permitted. Only Sunny Island inverters of the same device type may be installed in a
three-phase cluster. Several clusters may only be interconnected if the Multicluster-Box 12 (MC-BOX-12.3-20) is used
for it.
Additional requirements for battery-backup system
The battery-backup system must only be used in countries for which it is licensed or for which it is released by SMA
Solar Technology AG and the grid operator. In order to meet the technical connection requirements of the grid
operator and the locally applicable standards and directives, you must install the battery-backup system either with or
without all-pole disconnection:
Quick Reference Guide
Downloaded from www.Manualslib.com manuals search engine
SI44M-60H-80H-12-IS-xx-12
2 Safety
7