Cable Connection Sequence; Can Bus Interface; Synchronised Parallel Operation; Energy Storage System (Ess) - Victron energy Isolated SmartSolar MPPT RS 450/100 Manual

Isolated SmartSolar MPPT RS

3.5. Cable connection sequence

First: Confirm correct battery polarity, connect the battery.
Second: if required, connect the remote on-off, and programmable relay
Third: Confirm correct PV polarity, and then connect the solar array (if incorrectly connected with reverse polarity, the PV voltage
will drop, the controller will heat up but will not charge the the battery).
Torque: 2,4 Nm

3.6. Can bus interface

The solar charge controller is equipped with two VE.Can bus RJ45 sockets.
The CAN bus on this charger is not galvanically isolated. The CAN bus is referenced to the minus battery connection.
The CAN bus interface will be referenced to ground if the minus pole of the battery is grounded. In case of a positive grounded
system, a CAN isolation module will be needed to reference the CAN bus interface to ground. The end of a CAN cable should
have a bus terminator. This is achieved by inserting a bus terminator in one of the two RJ45 connectors and the CAN cable in the
other. In case of a node (two CAN cables, one in each RJ45 connector), no termination is needed.
Supply voltage (V+ supply): 9V-70V
Maximum supply current: 500mA
Data rate: 250 kbps
CANH/CANL voltage tolerance: +/-70VDC
CAN transceiver ISO specification: ISO 11898-2:2016
To provide maximum flexibility, the battery voltage is used for the V+ supply line of VE.CAN. This means that all
equipment connected to VE.CAN are a permanent load to the battery.

3.7. Synchronised parallel operation

Several charge controllers can be synchronised with the CAN interface. This is achieved by simply interconnecting the chargers
with RJ45 UTP cables (bus terminators needed, see section 3.6).
The paralleled charge controllers must have identical settings (e.g. charge algorithm). The CAN communication ensures that the
controllers will switch simultaneously from one charge state to another (from bulk charge to absorption for example). Each unit
will regulate its own output current, depending on the output of each PV array and cable resistance.
In case of synchronized parallel operation, the network icon will blink every 3 seconds on all paralleled units.
The PV inputs should not be connected in parallel. Each charge controller must be connected to its own PV array.

3.8. Energy Storage System (ESS)

An Energy Storage System (ESS) is a specific type of power system that integrates a power grid connection with a Victron
Inverter/Charger, GX device and battery system. It stores solar energy into your battery during the day, for use later on when the
sun stops shining.
Please refer to the following manual how to setup an ESS:
https://www.victronenergy.com/live/ess:start

3.9. User I/O

3.9.1. Remote on/off connector

The remote on/off has two terminals: Remote L and Remote H.
A remote on/off switch or relay contact can be connected between L and H. Alternatively, terminal H can be switched by a
connection to battery positive, or terminal L can be switched by a connection to battery minus.
Special case for Victron lithium batteries in combination with the miniBMS. When Lithium is selected in the software, the remote
on/off is changed, and that physical interface instead becomes the connection point for the allow-to-charge and allow-to-
discharge wires.
The remote H input is the connection point for the allow-to-discharge control wire and must to be connected to the Load output of
the miniBMS. The remote L input is the connection point for the allow-to-charge control wire and must be connected to the
Charger output of the miniBMS. Remote on/off function is now taken over by the miniBMS.
Page 8 Installation