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3.4.4 Programmable relay
The charge controller is equipped with a potential-free Single Pole Double Throw relay
that by default is programmed according to option 3 below.
The relay can be programmed to energize on one of the following events:
option 1: when the maximum voltage on the PV input is exceeded
option 2: when the temperature protection becomes active
option 3: when the battery voltage becomes too low (adjustable low voltage limit)
option 4: when the charger is in equalisation mode
option 5: when the charger is in error mode
option 6: when the charger temperature drops below -20°C (-40°F)
option 7: when the battery voltage becomes too high (adjustable high voltage limit)
option 8: when the charger is in float mode.
option 9: when the solar panel is irradiated (day/night indication).
3.4.5 Synchronised parallel operation
Several charge contollers can be synchronised with the CAN interface. This is achieved
by simply interconnecting the chargers with RJ45 UTP cables (bus terminators needed,
see section 3.4.3).
The paralleled charge contollers 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 (and should) regulate its own output current
, depending a.o. on the output of
each PV array and cable resistance.
In case of using remote sensors (voltage and/or temperature), the remote sensor must
be connected to only one of the paralleled charge controllers. All other contollers will
share the information via the CAN interface.
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.
3.4.6 Charge process controlled by a Multi or Quattro inverter/charger: HUB-1
operation
To build a Hub-1 off-grid or grid-interactive self-consumption system the charge controller(s)
must be connected to a Multi or a Quattro using the VE.BUS to VE.CAN interface. The
Micropressor of the Multi or Quattro will then control the charge process (HUB-1 assistant
software needed). The display on the controller will show ‘HUB-1’.
Please see Support & Downloads / software on our website for details about the required
software.
