Differences

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--- ve.bus:manual_parallel_and_three_phase_systems [2025-05-21 10:50] – mvader
+++ ve.bus:manual_parallel_and_three_phase_systems [2026-02-11 10:24] (current) – Added information about compatibility ids jpasop
@@ 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 single 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).
 ===== Warning =====