Victron energy MPPT 150/70-Tr VE.Can Manual De Instrucciones página 9

3.3 PV configuration
● The controllers will operate only if the PV voltage exceeds
battery voltage (Vbat).
● PV voltage must exceed Vbat + 5V for the controller to start.
Thereafter minimum PV voltage is Vbat + 1V.
● Maximum open circuit PV voltage: 150V or 250V, depending on model.
For example:
24V battery, mono- or polycristalline panels, max PV voltage 150V:
● Minimum number of cells in series: 72 (2x 12V panel in series
or one 24V panel).
● Recommended number of cells for highest controller efficiency:
144 cells (4x 12V panel or 2x 24V panel in series).
● Maximum: 216 cells (6x 12V or 3x 24V panel in series).
48V battery, mono- or polycristalline panels, max PV voltage 250V:
● Minimum number of cells in series: 144
(4x 12V panel or 2x 24V panel in series).
● Maximum: 360 cells (10x 12V or 5x 24 panel in series).
Remark: at low temperature the open circuit voltage of a 216 cell solar array
may exceed 150V, and the open cicuit voltage of a 360 cell array may
exceed 250V, depending on local conditions and cell specifications. In that
case the number of cells in series must be reduced.
3.4 Cable connection sequence (see figure 1)
First: connect the battery.
Second: if required, connect the remote on-off, CAN interface and
programmable relay
Third: connect the solar array (when connected with reverse polarity, the
controller will heat up but will not charge the battery).
3.5 Remote on-off
H-pin on level: >3V
L-pin on level: <5V
On-level impedance between L-H pins: <500kΩ
Voltage tolerance L & H pin: +/-70V
The recommended use of the remote on-off is:
a. A switch wired between the L-H pins
b. A switch wired between battery plus and the H-pin.
c) A switch between the L-pin and the charge disconnect terminal of a VE.Bus BMS
3.6 CAN bus interface
The charger is equipped with two 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
(also see the MPPT Excel sheet on our website)
DC
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