Studer Innotec SA
next3
52 V 1.3 © Studer-Innotec SA next3 Tech manual
5.8 MULTI-UNIT CONFIGURATIONS
Up to three next3 units may be used on the same battery bank to create a high-power
inverter-charger system. In multi-unit systems, next3 are interconnected via a communication
bus that uses the “Studer nx communication bus”. Units should be close to each other (in the
same room).
The following points must be followed:
• The nx-interface is mandatory for configuration.
• A reconfiguration of the system is mandatory when you add new elements to the system.
• All the AC-loads of a system must be connected in parallel, for each respective phase
(through a distribution panel for example).
• All the AC-Flex as loads must be kept separated. The AC-Flex can be programmed
separately.
• Only one AC-source will be used in a system. There is an identification process during the
configuration of the system with the nx-interface (wizard). That means the maximum transfer
is 80A and 80x230x3= 55.2 kVA.
5.8.1
Extension of an existing installation
It is possible to extend an existing installation by adding one or several similar next3 units in
parallel. The software compatibility of the new units is mandatory.
In multi-unit systems, all NEXTs from the same system must be connected to the same battery
bank. In multi-unit systems, the charge is synchronized, the charge current of each unit is
automatically chosen by the PFD (Power Flow Dispatcher).
In multi-unit systems, each next3 is connected to a common battery bank using its
own protection device. All other consumers or sources are connected directly to
the battery using their own protection device.
Equipment belonging to the same system must be operating with the same
software version. Download the latest software version from the Studer's website
and update the software for all units of the system independantly before
commissioning.
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