Freedom Lite Installation Manual Revision 12
P a g e
14 | 30
Goodwe
MLT Drives (2019 models onwards)
Socomec
Koyoe
ATESS (HPS and PCS ranges)
Sunsynk
Freedom Won welcomes any requests to produce BMS CAN profiles for other inverters that
are CAN equipped for BMS interface.
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
the Victron supplied resistors). SMA, Imeon, Solax and Victron operate on this basis for
example. Ingeteam has a separate CAN terminal block for bare wires to be inserted from the
BMS and these units have an internal resistor fitted into the device. All Freedom Lite models
have two CAN plugs for parallel configurations (Figure 4.2) and to allow fitment of the
termination resistors on the end of line units. Where one Lite is installed or where it is the
end of line CAN device, t
he Lite must be fitted with a termination resistor
.
The Lite is not supplied with termination resistors as standard
. For Lites installed on
inverter systems other than Victron (two of these resistors are supplied with the Victron
Venus Controller family of products), it is necessary to purchase two Victron termination
resistors from Freedom Won or a Victron distributor.
