Freedom Lite Home and Business HV Installation Manual Revision 1
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controller to be controlled by CAN it must first of all be equipped with a CAN interface as
well as a suitable method of connecting the CAN wires. Further to this the Freedom Lite
BMS must be programmed with a CAN messaging profile that is developed for the inverter
or charge controller being used. This profile must be specifically developed for each inverter
model or model range. To date Freedom Won has developed CAN profiles for the following
high DC voltage inverter equipment in relation to the Home and Business HV and HV+ range:
Ingeteam Sun Storage Battery Inverters
ATESS (HPS and PCS ranges)
Solax
Goodwe
Socomec
Sofar Solar
Solis
Elpower
Vensys
ABB
Freedom Won welcomes any requests to produce and test BMS CAN profiles for other
inverters that are CAN equipped for BMS interfacing. For a list of approved CAN interfaces
for 48V inverters please refer to the Home and Business 52V manual.
The CAN interface can provide the following functionality to compatible devices:
i.
Charge Current Limit of all Lite’s connected
ii.
Discharge Current Limit of all Lite’s connected
iii.
Actual State of Charge (minimum of all lights connected)
iv.
Actual Battery Temperature (highest of all lights connected)
v.
Actual Voltage
vi.
Actual Current (total of all Lite’s connected)
vii.
Maximum real time charge voltage setpoint
viii.
Battery Name
ix.
Highest Cell Voltage of all Lite’s connected
x.
Lowest Cell Voltage of all Lite’s connected.
xi.
Firmware Version
xii.
Ah capacity of all batteries connected
xiii.
Advanced communication between all connected Lites
The CAN 2.0 Part A and Part B standard uses the SAE J1939 standard in the Lite. It is
necessary to install a 120 Ohm resistor on each extreme end of the CAN cable (splices do
not require a resistor). Most devices operating on CAN have two plugs to connect an
incoming cable in and then outgoing cable on the CAN Bus. The first and the last device in
the chain must have a termination resistor plugged into the spare (second) plug. These
resistor plugs are available from Freedom Won (if you are using Victron then you can use
