Freedom Lite Home and Business HV Installation Manual Revision 1
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signs on the battery casing beside the respective cables. See Tables 2.1 for the cable size
and quantity fitted to each Freedom Lite HV model. The cable cross sectional area is based
on an acceptable voltage drop with the inverter being mounted on the wall adjacent to the
Freedom Lite battery so that the cable run is less than 5m (note however that the standard
cable length is 1,8m, longer cables available on request).
Cable runs longer than 5m should be assessed and larger cables considered for extending
the Freedom Lite cables to minimise voltage drop. Double Insulation welding cable is
recommended, rated for at least 600V.
The cables may be routed through trunking and connected into the inverter on the positive
and negative terminals, respectively. On Installations where there is more than one inverter
a DC connector box is required as a common point to route the DC cables to each inverter
so that the DC cable run can be kept the same length to all inverters.
5.2
Control Cables – Overview
For controlling external devices, you will need to connect the CAN Bus cable that allows the
Battery Management System inside the Freedom Lite to control, and interface with, these
devices.
The CAN Bus connection is made using the RJ45 plug with the pin configuration on the
battery plug end provided in Table 5.1.
Table 5.1 Colour Coding and Pin Configuration for CAN Bus UTP Control Cable
RJ45 Pin No.
Standard Ethernet Cable Colours
Wire Function
Pin 7
Brown/White
CAN High
Pin 8
Brown
CAN Low
Only Victron is accommodated by the pin populations in Table 5.1 using a standard Type T-
568B RJ45 terminated UTP cable. For other inverter brands, please refer to the respective
inverter brands’ manuals for their pin configuration or contact Freedom Won for assistance.
Some brands are covered in Table 5.2 below.
Special CAN cables for supported inverter brands are available from Freedom Won (see
accessories section). Please ensure that you use a correctly configured cable to prevent
damage to any CAN Bus devices.
5.3
CAN Bus Control – Detailed Description
CAN is a widely used communication protocol in systems with many devices that must
report their status or send commands to other devices on the same network. The Freedom
Lite BMS can transmit messages and commands in CAN protocol to provide information to,
but more importantly to control, external devices. CAN allows great versatility and provides
a simple installation because there are only two wires required in this form of
communication, namely CAN High and CAN Low. In order for an inverter or charge
