Temperature Sensor (Connection Terminal J, See; Parallel Connection; Three-Phase Operation; Connection To The Vrm Portal - Victron energy MultiPlus-II GX Manual

During battery charging, the inverter/charger will compensate the voltage drop over the DC cables up to a maximum of 1 Volt (i.e.
1V over the positive connection and 1V over the negative connection). If the voltage drop threatens to become larger than 1V, the
charging current is limited in such a way that the voltage drop remains limited to 1V.
9.5.5. Temperature sensor (connection terminal J, see Appendix A)
For temperature-compensated charging, the temperature sensor (supplied with the inverter/charger) can be connected. The sen-
sor is isolated and must be fitted to the negative terminal of the battery.

9.5.6. Parallel Connection

It is required to use identical units for three phase and parallel systems. In this case, as only one GX device is allowed per sys-
tem, if you wish to parallel and/or three phase with this product, you must find the same model MultiPlus-II to pair.
To assist with finding identical units, consider instead using MultiPlus-II for parallel and three phase systems, and an external GX
device.
Up to six units can be connected in parallel. When connecting this product with MultiPlus-II in a parallel system, the following
requirements must be met:
WARNING
• It is essential the negative battery terminal between the units is always connected. A fuse or circuit breaker
is not allowed on the negative.
• All units must be connected to the same battery.
• A maximum of six units connected in parallel.
• The devices must be identical (aside from GX part) and have the same firmware.
• 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 units.
• Always interconnect the negative battery cables before placing the UTP cables.
• Place the units close to each other, but allow at least 10cm for ventilation purposes under, above and beside the units.
• UTP cables must be connected directly from one unit to the other (and to the remote panel). Connection or splitter boxes are
not permitted.
• Only one remote control means (panel or switch) can be connected to the system. That means only one GX.

9.5.7. Three-phase operation

The product 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 will require subsequent configuration.
Pre-requisites: see Section Voltage Sense
1. Note: the product is not suitable for 3-phase delta (Δ) configuration.
2. When the AS4777.2 grid code has been selected in VEConfigure, only 2 units in parallel per phase are allowed in a three
phase system.
For full details on parallel and three-phase configuration always discuss with your Victron distributor first and please see this spe-
cific manual:
https://www.victronenergy.com/live/ve.bus:manual_parallel_and_three_phase_systems

9.5.8. Connection to the VRM Portal

Connection of the product to VRM requires an internet connection. This can be made via wifi, or preferably a hardwired ethernet
cable to an internet connected router.
The VRM site id is located on a sticker inside the cable connections area of the device.
For more information to set up VRM, refer to the
MultiPlus-II GX
VRM Getting Started Manual.
17