Studer Innotec SA
next3
100 V 1.3 © Studer-Innotec SA next3 Tech manual
8.5 BATTERY
8.5.1
General information
The next3 is a fully automatic charger designed to guarantee an optimum charge for the
most used battery types: lead (liquid acid, gel or AGM), and Lithium among others. The next3
charger will use the energy either from solar or from the grid/genset. The choice of the battery
type is done during the wizard at commissioning and cannot be changed during operation.
Standard lead batteries with liquid (VLA, VRLA), gelled (GEL) and AGM electrolyte may be
used. The next3 can easily be configured to adapt the charging profile (bulk, absorption,
equalization, floating) and voltages to the battery type connected. Other battery types as
Ni-Cd, NiFe, Vanadium, Aquion, etc. can also be used as the configuration possibilities for
voltage levels and currents are very flexible.
The next3 can be connected to lithium Battery Management System (BMS) with CAN bus if
the protocols of communication are compatible. In that case the BMS decides the voltage
levels and currents that are optimal for the battery and communicates this information to the
next3 system.
The solar battery charger enters automatically into operation as soon as the solar irradiation
is sufficient and PV modules produce enough voltage (350V start-up voltage). The charging
from the grid/genset is performed according to the AC energy management settings. When
charging from the grid/genset, the next3 follows the same charging cycle as the solar. The
maximum charge current of the battery will limit both the charging with solar and with the
grid. The solar has the priority, and the power coming from AC source is decreased first.
The next3 configuration can be modified by the user or the installer to adapt the equipment
to the chosen battery in the best possible way. These parameters can be modified by means
of the remote control nx-interface.
8.5.2
Battery Information
Much information can be obtained from the next3 about the battery state and the inverters
operation. The information can be seen on the remote control nx-interface, on the web portal
and the APP (if connected to internet for monitoring), or with a dedicated communication
(MODBUS TCP or RTU).
See chapter “7 HMI: Use of nx-interface” to have the map of all screens.
The information screen seen on the nx-interface for the battery is as below:
The use of other battery types like NiFe, Ni-Cd, non-communicating Li-ion or others
is possible if the charge profile is properly programmed, in accordance with the
specifications of the battery manufacturer, in agreement with the battery
manufacturer and under the responsibility of the installer.
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