SMA MULTICLUSTER BOX 12 User Manual
Page 8
2 Safety
SMA Solar Technology AG
8
MC-BOX-12-3-20-BE-en-10
Operating Manual
Only a generator may be connected directly to the Multicluster Box. To connect the utility grid in addition to the
generator, it is necessary to install either a Grid Connect Box or an NA Box between the utility grid and the
Multicluster Box (for intended use of the Grid Connect Box / NA Box see operating manual of the Grid Connect Box /
NA Box).
The Multicluster Box is designed for connection to TN-S, TN-C-S and TT systems:
• If only the Multicluster Box is used, the multicluster system must be grounded outside the Multicluster Box on the
generator side (see Section 6.8, page 23).
• If the Multicluster Box is used together with an NA Box, the utility grid can be a TN-S, TN-C-S or TT system
(see operating manual of the NA Box). No additional grounding measures are required.
• If the Multicluster Box is used together with the Grid Connect Box, remember that the all-pole disconnection can be
deactivated on the Grid Connect Box (see operating manual of the Grid Connect Box). If the all-pole disconnection
on the Grid Connect Box is deactivated, the utility grid must be configured as a TN-C-S system (see Section 4.2,
The Multicluster Box must only be operated in conjunction with Sunny Island 6.0H / 8.0H inverters with software
release 3.5 or higher. Always take the maximum AC connection power and the permitted inverter combinations into
account.
• Only inverters of the same device type must be installed in a cluster.
• Different clusters may be equipped with inverters of different device types.
All work on the product must only be performed using appropriate tools and in compliance with the ESD protection
regulations.
Suitable personal protective equipment has to be worn by all persons working on or with the product.
The Multicluster Box is designed for use at altitudes of up to 3,000 m above mean sea level. If you wish to use the
Multicluster Box at elevations above 3,000 m, contact the SMA Service Line (see Section 14, page 46).
The product is suitable exclusively for use in weather-protected outdoor areas and in indoor areas. Only operate the
product at temperatures between − 25°C and +60°C.
Use this product only in accordance with the information provided in the enclosed documentation and with the locally
applicable standards and directives. Any other application may cause personal injury or property damage. Alterations
to the product, e.g., modifications or conversions, are only permitted with the express written permission of
SMA Solar Technology AG. Unauthorized alterations will void guarantee and warranty claims and in most cases
terminate the operating license. SMA Solar Technology AG shall not be held liable for any damage caused by such
alterations.
Any use of the product other than that described in the Intended Use section does not qualify as appropriate.
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.