Differences

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--- ve.bus:manual_parallel_and_three_phase_systems [2024-07-23 05:13] – mleeftink
+++ ve.bus:manual_parallel_and_three_phase_systems [2026-03-04 09:34] (current) – [Communication wiring] guy_stewart
@@ Line 8: / Line 8: @@
   * Note that some parts of the description below apply only to firmware version 400 and later.
   * All units in one system must be the same type and firmware version; this includes same size, system voltage, and feature set. The type is indicated by the first four digits of the firmware version number. For details, see the "VE.Bus Firmware Numbering System" section in the [[https://www.victronenergy.nl/upload/documents/manual-VE.Bus-firmware-versions-explained-EN.pdf|VE.Bus Firmware versions explained document]].
   * Specify with your [[https://www.victronenergy.com/where-to-buy|Victron distributor]] that you will be connecting units in parallel or multi-phase and identical units must be supplied.
+  * All parallel units in the same phase should have matching compatibility ID letter. See information below.
   * The same number of units need to be installed on each phase. An example to clarify: 3 units on L1, 3 on L2, and 3 on L3 is OK. But 2 on L1, 3 on L2 and 3 on L3 is not OK. The only way such non-symmetrical installation is supported is when using no monitoring at all, or a Digital Multi Control. Combining such system with any other monitoring device, such as the VE.Bus Smart Dongle or a GX device like the Cerbo is not supported. Numbers and information shown on the GX device as well as VRM portal will or can be wrong, and controlling the system, for example setting input current limits will not always work properly either.
   * MultiPlus-II 8k, 10k, and 15k models can only be connected in parallel if an external AC transfer switch is used. For more information see the [[https://www.victronenergy.com/media/pg/MultiPlus-II_External_Transfer_Switch_application/en/index-en.html|MultiPlus-II External Transfer Switch application manual]].
   * While VE.Bus System Configurator allows setting up a system using Multis (each having a single AC input), that is configured to have multiple separate AC inputs, such system is not supported by GX devices.
   * This information does __not__ apply to the Multi RS and Inverter RS models, which use a VE.Can interface (not VE.Bus) see the RS product manuals for specific information on programming them for three phase.
+===== Compatibility IDs explained =====
+The **compatibility ID** denotes which devices can be combined in a VE.Bus system.\\ This ID can be found on the stickers of the units.<sup>1)</sup>\\ A compatibility ID consists of a 4-digit number followed by a letter. (e.g. 2623_B)\\ VE.Bus systems can only be made with devices with identical 4-digit numbers and only devices with the same letter can be put in a single phase.\\
+    * Make sure that the 4-digit number in the compatibility ID of all units in the VE.Bus system is identical .
+    * Make sure that units in a single phase (so parallel units) have an identical letter in the compatibility ID.
+<sup>1)</sup> If there is no compatibility ID on the sticker then the compatibility ID consists of the first 4 digits of the complete firmware number followed by the letter **A**.\\ The one exception to this rule is firmware 2699xxx: If there is no compatibility ID on the sticker then the compatibility ID is 26**2**9_A (instead of 26**9**9_A).
+Note: The 4-digit number in the compatibility ID does not necessarily represent the firmware version of the unit itself. For instance a MultiPlus-II 24/5000/120-50 could require firmware version 2696xxx while the compatibility id sticker on that unit shows 2615_B.
 ===== Warning =====
@@ Line 52: / Line 62: @@
 For units in parallel: Both the DC and AC wiring needs to be symmetrical per phase: use the same length, type and cross-section to every unit in the phase. To make this easy, use a bus-bar or power-post before and after the inverter/chargers. Also, apply the same torque on all connections.
-With regards to AC fusing, each unit needs to be fused individually. Make sure to use the same type of fuse on each unit due to same resistance. Consider using mechanically connected fuses.
+With regards to AC fusing, each unit needs to be fused individually. Make sure to use the same type of fuse on each unit due to same resistance. Consider using mechanically connected fuses, so that if one trips, they all trip - leading to a clear fault.
 With regards to DC fusing, each unit needs to be fused individually. Make sure to use the same type of fuse on each unit due to same resistance.
@@ Line 88: / Line 98: @@
 ===== Communication wiring =====
-  * All units must be daisy chained with the VE.Bus cable (RJ-45 cat5). The sequence for this is not important. Do not use terminators in the VE.Bus network.
+  * All units must be daisy chained with the VE.Bus cable (RJ-45 Cat5 or better). The sequence for this is not important. Do not use terminators in the VE.Bus network.
   * The temperature sensor can be wired to any unit in the system. For a large battery bank it is possible to wire multiple temperature sensors. The system will use the one with the highest temperature to determine the temperature compensation.
   * Wire the voltage sense on the master of L1.\\ (If the system has more than 1 AC input, connect it to the Master corresponding to the first AC input.) \\ All other units ignore their voltage sense input and receive the voltage sense value from the L1 master.
+  * [[https://www.victronenergy.com/live/ve.bus:ve.bus_network_interference|Further information on best practices for VE.Bus wiring]], can help with reducing VE.Bus errors caused by interference as system size increases.
 ===== Configuration =====
@@ Line 111: / Line 122: @@
   * PowerAssist settings
   * Accept wide input frequency range on/off
+  * Weak AC input on/off
 The following settings need to made in each unit in the system:
   * Country / grid code standard and other grid related values (AC high/ low values)
@@ Line 137: / Line 149: @@
   * {{:ve.bus:4._ripple_in_a_ac_battery_system.pdf|presentation - DC Ripple}}
   * {{:ve.bus:rva_-_theory_on_wiring_large_systems.pdf|presentation - Theory on wiring large systems}}
+  * {{ :ve.bus:ve_online_-_multi_and_quattro_parallel_and_3_phase.pdf | Multi and Quattro parallel and 3 phase training presentation}}
   * [[https://www.victronenergy.com/live/ve.bus:ve.bus_error_codes|VE.Bus error codes]]
   * [[https://www.victronenergy.com/support-and-downloads/software#victron-toolkit-app|Victron Toolkit App with LED code definitions]]