SMA SMB - Manual (Page 7)

SMA Solar Technology AG 2 Safety
Installation Manual SMB-IA-en-10 7
2 Safety
2.1 Intended Use
The Sunny Main Box and the Sunny Main Box Cabinet are DC main distributions which gather the
outgoing string cables from the DC sub-distributions and lead them to the central inverter via the
DC main cable.
Figure 1: Overview of a PV plant with Sunny Main Boxes and a central inverter
For optimum operation of the Sunny Main Box or Sunny Main Box Cabinet, observe the requirements
for the mounting location. For safety reasons, it is not permitted to modify the product or install
components that are not explicitly recommended or distributed by SMA Solar Technology AG for this
product.
The enclosed documentation is an integral part of this product.
• Read and observe the documentation.
• Keep the documentation in a convenient place for future reference.
Only use the Sunny Main Box and Sunny Main Box Cabinet in accordance with the information
provided in the enclosed documentation. Any other use may result in personal injury or property
damage.
Position Designation
A PV modules
B DC sub-distribution (e.g. Sunny String-Monitor)
C DC main distribution, e.g., Sunny Main Box
D Central inverter
E Transformer station, z. B. Transformer Compact Station
F Electricity grid