SMA MULTICLUSTER BOX 12 User Manual
Page 27
SMA Solar Technology AG
7 Preparing the Multicluster System for Commissioning
Operating Manual
MC-BOX-12-3-20-BE-en-10
27
7 Preparing the Multicluster System for Commissioning
Requirements:
☐ If the Multicluster Box is installed without Grid Connect Box or NA Box, the jumper wires for blocking the grounding
contactor and the generator contactor must be in place (see Section 6.2, page 19).
☐ In a multicluster system with Grid Connect Box / NA Box, all preparations for commissioning the system must have
been completed in the Grid Connect Box / NA Box (see operating manual of the Grid Connect Box / NA Box).
☐ The Multicluster Box must be properly installed (see Section 5, page 14).
☐ The multicluster system must be grounded outside the Multicluster Box on the generator side or via the
Grid Connect Box / NA Box (see Section 6.8 "Grounding the Multicluster System", page 23).
☐ All power, control and data cables must be correctly connected (see Section 6, page 17).
☐ All cables must be tightly enclosed by a membrane or cable feed-through in the floor of the Multicluster Box.
☐ All power cables of the generator, loads, PV system and Sunny Island inverters must be retained inside or outside
the Multicluster Box.
☐ In a multicluster system with Grid Connect Box / NA Box, all power cables must be retained inside or outside the
Multicluster Box.
☐ The floor of the Multicluster Box must be closed with the base plates. All seals must be correctly fitted.
☐ The kick plates on the base of the Multicluster Box must be attached (see Section 6.11, page 26).
Procedure:
1. Mount the protective cover (see Section 9.2, page 30).
2. Close the Multicluster Box.
3. Commission the multicluster system (see documentation of the Sunny Island inverter).
Load shedding in the first two operating hours
The state of charge (SOC) recorded by battery management and the available battery capacity (SOH) of the
battery will deviate strongly in a newly connected battery from the actual SOC and SOH values. During operation,
the values recorded by battery management will gradually approach the real values. In the first two operating hours
using the new battery, these deviations can lead to load shedding.