Temperature Sensor (Connection Terminal J, See; Parallel Connection; Three-Phase Operation - Victron energy MultiPlus-II Manual

4.4.5. Temperature sensor (connection terminal J, see appendix A)
For temperature-compensated charging, the temperature sensor (supplied with the MultiPlus-II) can be connected. The sensor is
isolated and must be fitted to the negative terminal of the battery.

4.4.6. Parallel Connection

Up to six identical units can be connected in parallel. When connecting MultiPlus-II units in parallel, the following requirements
must be met:
• All units must be connected to the same battery.
• A maximum of six units can be connected in parallel.
• Only identical devices may be connected in parallel.
• The DC connection cables to the devices must be of equal length and cross-section.
• If a positive and a negative DC distribution point is used, the cross-section of the connection between the batteries and the DC
distribution point must at least equal the sum of the required cross-sections of the connections between the distribution point
and the MultiPlus-II units.
• Place the MultiPlus-II units close to each other, but allow at least 10cm for ventilation purposes under, above and beside the
units.
• It is essential the negative battery terminal between the units is always connected. A fuse or circuit breaker is not allowed.
• UTP cables must be connected directly from one unit to the other (and to the remote panel). Connection or splitter boxes are
not permitted.
• Always interconnect the negative battery cables before placing the UTP cables.
• Only one remote control means (panel or switch) can be connected to the system.

4.4.7. Three-phase operation

The MultiPlus-II can also be used in 3-phase wye (Y) configuration. To this end, a connection between the devices is made by
means of standard RJ45 UTP cables (the same as for parallel operation). The system (MultiPlus-II plus an optional control panel)
will require subsequent configuration (see
Pre-requisites: see Section 4.4.5
1. Note: the MultiPlus-II is not suitable for the 3-phase delta (Δ) configuration.
2. L2 outputs are disabled in a multi-phase setup.
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MultiPlus-II 48V 3kVA 120V
Section 5 [15]).
[13].
Installation