# \#modbus\_tcp **URL:** https://community.victronenergy.com/tag/modbus-tcp/186.md [Latest](https://community.victronenergy.com/latest.md) · [Categories](https://community.victronenergy.com/categories.md) · [Tags](https://community.victronenergy.com/tags.md) --- ## [Janitza Grid-Meter integration](https://community.victronenergy.com/t/janitza-grid-meter-integration/31685)
**Author:** [@qasi29](https://community.victronenergy.com/u/qasi29)\ **Replies:** 1\ **Last updated:** [21 October 2026 11:17 UTC](https://community.victronenergy.com/t/janitza-grid-meter-integration/31685 "2026-10-21T11:17:06Z")
Hi there, i have writen a Integration for Janitza Grid Analyzer. With the Script you can integrate Janitza Grid-Meters using Modbus RTU or TCP, into Venus-OS like any Victron Meter. Currently supported: UMG 96 RM (a… --- ## [EVCS loses connection to Cerbo GX periodically - "Error finding service with device type evcharger a](https://community.victronenergy.com/t/evcs-loses-connection-to-cerbo-gx-periodically-error-finding-service-with-device-type-evcharger-a/59877)
**Author:** [@Wiggum127](https://community.victronenergy.com/u/Wiggum127)\ **Replies:** 3\ **Last updated:** [15 August 2026 20:09 UTC](https://community.victronenergy.com/t/evcs-loses-connection-to-cerbo-gx-periodically-error-finding-service-with-device-type-evcharger-a/59877 "2026-08-15T20:09:25Z")
System configuration: Cerbo GX, Venus OS v3.75 EV Charging Station (EVCS), firmware v2.08, product ID 0xC026 MultiPlus II (VE.Bus, slave 227) Carlo Gavazzi EM24 grid meter (slave 30) Home Assistant (via sfst… --- ## [Need help with reading data via Modbus TCP](https://community.victronenergy.com/t/need-help-with-reading-data-via-modbus-tcp/61191)
**Author:** [@gomma](https://community.victronenergy.com/u/gomma)\ **Replies:** 7\ **Last updated:** [2 August 2026 11:19 UTC](https://community.victronenergy.com/t/need-help-with-reading-data-via-modbus-tcp/61191 "2026-08-02T11:19:30Z")
Hello, I’m trying to read data through Modbus TCP from Cerbo, but I get big difference from what I see in Modbus responses and in Victron application. I’m following registers: sum of 820, 821 and 822 to get import/ex… --- ## [EVCS MODBUS communication returns zero](https://community.victronenergy.com/t/evcs-modbus-communication-returns-zero/59330)
**Author:** [@bidref](https://community.victronenergy.com/u/bidref)\ **Replies:** 2\ **Last updated:** [21 July 2026 16:53 UTC](https://community.victronenergy.com/t/evcs-modbus-communication-returns-zero/59330 "2026-07-21T16:53:32Z")
I’m trying to read the modbus registers with a MODBUS-reader for later use in OPENHAB. When I try it with Node-Red on my Multiplus its fine. But over the network I’m getting zero values only. Wrong addresses are answer… --- ## [Retour d'expérience sur intégration Enphase par Modbus TCP](https://community.victronenergy.com/t/retour-dexperience-sur-integration-enphase-par-modbus-tcp/42638)
**Author:** [@Q.x](https://community.victronenergy.com/u/Q.x)\ **Replies:** 15\ **Last updated:** [16 July 2026 17:38 UTC](https://community.victronenergy.com/t/retour-dexperience-sur-integration-enphase-par-modbus-tcp/42638 "2026-07-16T17:38:28Z")
J’ouvre ce sujet afin de partager et d’échanger autour de l’intégration de la passerelle Enphase au GX par communication Modbus TCP. Il y a quelques semaines Guilhem (@Guizmon) annonçait avoir rencontré quelques problèm… --- ## [Victron system does not prevent grid feed-in by SolarEdge inverter](https://community.victronenergy.com/t/victron-system-does-not-prevent-grid-feed-in-by-solaredge-inverter/58636)
**Author:** [@PhilipZetten](https://community.victronenergy.com/u/PhilipZetten)\ **Replies:** 12\ **Last updated:** [11 July 2026 10:05 UTC](https://community.victronenergy.com/t/victron-system-does-not-prevent-grid-feed-in-by-solaredge-inverter/58636 "2026-07-11T10:05:06Z")
I have been trying to automatically prevent grid feed-in by my SolarEdge SE3680H inverter using Modbus commands sent by my Cerbo, but it just doesn’t work. Hope someone can point me in the right direction. My setup: T… --- ## [EM24 Ethernet-Energiezähler: Scan der verwendeten ModBus-Register eines EM24](https://community.victronenergy.com/t/em24-ethernet-energiezahler-scan-der-verwendeten-modbus-register-eines-em24/19209)
**Author:** [@cipo](https://community.victronenergy.com/u/cipo)\ **Replies:** 2\ **Last updated:** [6 July 2026 19:32 UTC](https://community.victronenergy.com/t/em24-ethernet-energiezahler-scan-der-verwendeten-modbus-register-eines-em24/19209 "2026-07-06T19:32:42Z")
Hi, inspiriert durch einen alten Eintrag zum Thema “emulating EM24 ethernet meter via modbusTCP server” bin ich beim Überlegen, ebenfalls einen EM24 Emulator für ein geplantes Victron ESS zu verwenden. Einerseits, weil … --- ## [Modbus connection from Cerbo to DC PV Charger](https://community.victronenergy.com/t/modbus-connection-from-cerbo-to-dc-pv-charger/58190)
**Author:** [@ThomasSC84](https://community.victronenergy.com/u/ThomasSC84)\ **Replies:** 2\ **Last updated:** [20 May 2026 03:25 UTC](https://community.victronenergy.com/t/modbus-connection-from-cerbo-to-dc-pv-charger/58190 "2026-05-20T03:25:02Z")
Hello Everybody, I’m trying to set up my Cerbo gx to work mit my DC PV-Charger. The PV Charger allows modbus to connect. but somehow it doesn’t work. Im trying the set it up with node Red activated in the Cerbo. I also… --- ## [Can a custom Cerbo GX Node-RED Virtual Switch be read via Modbus TCP?](https://community.victronenergy.com/t/can-a-custom-cerbo-gx-node-red-virtual-switch-be-read-via-modbus-tcp/58019)
**Author:** [@Lukyzelva](https://community.victronenergy.com/u/Lukyzelva)\ **Replies:** 0\ **Last updated:** [15 May 2026 18:49 UTC](https://community.victronenergy.com/t/can-a-custom-cerbo-gx-node-red-virtual-switch-be-read-via-modbus-tcp/58019 "2026-05-15T18:49:04Z")
Hi, I’m using Cerbo GX with Modbus TCP and Node-RED, and I’m trying to find out whether a Virtual Switch created in Node-RED can be read through Modbus TCP. The switch is created directly in Node-RED on the Cerbo GX, an… --- ## [Ethernet and modbus tcp simultaneously with a switch Multiplus II GX 48/5000/70](https://community.victronenergy.com/t/ethernet-and-modbus-tcp-simultaneously-with-a-switch-multiplus-ii-gx-48-5000-70/57675)
**Author:** [@thomasSO](https://community.victronenergy.com/u/thomasSO)\ **Replies:** 1\ **Last updated:** [7 May 2026 08:25 UTC](https://community.victronenergy.com/t/ethernet-and-modbus-tcp-simultaneously-with-a-switch-multiplus-ii-gx-48-5000-70/57675 "2026-05-07T08:25:54Z")
Hi, I am planning on using modbus tcp on my Multiplus II GX 48/5000/70. As there is only one ethernet port, can I use a switch to connect the multiplus to my house using ethernet network and to an ESP32 through modpus … --- ## [Enphase Power Limit Venus OS DESS](https://community.victronenergy.com/t/enphase-power-limit-venus-os-dess/57068)
**Author:** [@G-Energy0](https://community.victronenergy.com/u/G-Energy0)\ **Replies:** 5\ **Last updated:** [25 April 2026 15:26 UTC](https://community.victronenergy.com/t/enphase-power-limit-venus-os-dess/57068 "2026-04-25T15:26:19Z")
Hi, I have installed a Victron 3 Phase MultiRS configuration. - 3 Phase MultiRS -40kWh LFP batteries -6480Wp Enphase PV Micro Inverters on AC OUT \[Modbus TCP for power Limiting\] The Enphase micro inverters can be po… --- ## [Modbus RTU crashes by Modbus TCP requests](https://community.victronenergy.com/t/modbus-rtu-crashes-by-modbus-tcp-requests/55850)
**Author:** [@Ulfilas](https://community.victronenergy.com/u/Ulfilas)\ **Replies:** 5\ **Last updated:** [2 April 2026 06:34 UTC](https://community.victronenergy.com/t/modbus-rtu-crashes-by-modbus-tcp-requests/55850 "2026-04-02T06:34:41Z")
I am running a cerbo (v3.72 and v3.80~9 tested) with serial-battery and Node-Red instance. My idea was to fetsh data from an energy meter (EM540) over Modbus TCP (using an waveshare gateway). I whant to use the ethernet… --- ## [Cerbo GX Prozessor überladen?](https://community.victronenergy.com/t/cerbo-gx-prozessor-uberladen/55800)
**Author:** [@gegy](https://community.victronenergy.com/u/gegy)\ **Replies:** 7\ **Last updated:** [31 March 2026 13:34 UTC](https://community.victronenergy.com/t/cerbo-gx-prozessor-uberladen/55800 "2026-03-31T13:34:18Z")
Hallo. Mein Cerbo GX ist über LAN an meinem Netzwerk angeschlossen, damit ich via Mod-Bus diverse Daten abgreifen kann. Nun ist es aber wohl so, dass diese Schnittstelle den Prozessor vom Cerbo ziemlich beansprucht. Das… --- ## [Modbus Multi RS ESS minimum SoC setting address?](https://community.victronenergy.com/t/modbus-multi-rs-ess-minimum-soc-setting-address/55216)
**Author:** [@Thieu](https://community.victronenergy.com/u/Thieu)\ **Replies:** 2\ **Last updated:** [20 March 2026 17:24 UTC](https://community.victronenergy.com/t/modbus-multi-rs-ess-minimum-soc-setting-address/55216 "2026-03-20T17:24:16Z")
I’m trying to read and control ESS Minimum SoC over Modbus. The address is 2901 on ID100. This is for the Cerbo, I can change the value over Modbus, and the value readout over Modbus is changed accordingly, but it does … --- ## [Urgent help required for ESS mode 3 and ModbusTCP](https://community.victronenergy.com/t/urgent-help-required-for-ess-mode-3-and-modbustcp/53384)
**Author:** [@dgoadby](https://community.victronenergy.com/u/dgoadby)\ **Replies:** 4\ **Last updated:** [13 March 2026 15:29 UTC](https://community.victronenergy.com/t/urgent-help-required-for-ess-mode-3-and-modbustcp/53384 "2026-03-13T15:29:27Z")
Installation: Victron MultiPlus-II GX Inverter/Charger (firmware: 3.67). Fogstar-16kWh battery - CANbus connected to Victron. 4kW and 2kW Growatt PV inverters. External Shelly Energy Monitors. Current Shunt to be … --- ## [Wanted: GX modbus register value of gui-v2 "Lowest/Highest Cell Voltage" with THREE digits](https://community.victronenergy.com/t/wanted-gx-modbus-register-value-of-gui-v2-lowest-highest-cell-voltage-with-three-digits/54864)
**Author:** [@MSl1](https://community.victronenergy.com/u/MSl1)\ **Replies:** 5\ **Last updated:** [13 March 2026 15:20 UTC](https://community.victronenergy.com/t/wanted-gx-modbus-register-value-of-gui-v2-lowest-highest-cell-voltage-with-three-digits/54864 "2026-03-13T15:20:48Z")
The gui-v2 (and v1) show this voltages with 3 digits. A modbus request delivers only 2 digits. Also the VRM has only 2 digits. --- ## [Control of Victron Battery Discharge and Grid Power Management via MODBUS](https://community.victronenergy.com/t/control-of-victron-battery-discharge-and-grid-power-management-via-modbus/8799)
**Author:** [@marc.schmaus](https://community.victronenergy.com/u/marc.schmaus)\ **Replies:** 4\ **Last updated:** [26 January 2026 12:08 UTC](https://community.victronenergy.com/t/control-of-victron-battery-discharge-and-grid-power-management-via-modbus/8799 "2026-01-26T12:08:43Z")
I want to control Victron so that I can decide when Victron is allowed to discharge the batteries at night or instead draw energy from the grid. As I found out, I can achieve this via MODBUS registers 2704 and 2705. As… --- ## [Multiplus II GX tcp control](https://community.victronenergy.com/t/multiplus-ii-gx-tcp-control/28062)
**Author:** [@Roel\_R](https://community.victronenergy.com/u/Roel_R)\ **Replies:** 4\ **Last updated:** [24 January 2026 12:16 UTC](https://community.victronenergy.com/t/multiplus-ii-gx-tcp-control/28062 "2026-01-24T12:16:21Z")
I have a multiplus 2 GX and want to make a regulation in my home control system in Ess mode 3 via modbus tcp. There is a connection and I can read all parameters on mb228. According to the address list I can determine … --- ## [Cerbogx Modbus Update rate](https://community.victronenergy.com/t/cerbogx-modbus-update-rate/50281)
**Author:** [@mikeseaman3000](https://community.victronenergy.com/u/mikeseaman3000)\ **Replies:** 3\ **Last updated:** [16 December 2025 16:21 UTC](https://community.victronenergy.com/t/cerbogx-modbus-update-rate/50281 "2025-12-16T16:21:12Z")
Hi there, Is anyone using ModbusTCP to communicate with their Victron System? I am using it with my Victron Quattro & CerboGX. I am finding the update rates are extremely slow with the CerboGX. Is anyone else experienc… --- ## [Cerbo GX Modbus](https://community.victronenergy.com/t/cerbo-gx-modbus/49958)
**Author:** [@mikeseaman3000](https://community.victronenergy.com/u/mikeseaman3000)\ **Replies:** 0\ **Last updated:** [8 December 2025 17:30 UTC](https://community.victronenergy.com/t/cerbo-gx-modbus/49958 "2025-12-08T17:30:33Z")
Hi everyone, I am using a loxone home control system and communicating with a victron cerbo gx over Modbus TCP. I am struggling to get the polling rate any quicker than like 10-20s per signal coming in to the Loxone sy… --- ## [GX Modbus Register of Battery Capacity](https://community.victronenergy.com/t/gx-modbus-register-of-battery-capacity/49814)
**Author:** [@MSl1](https://community.victronenergy.com/u/MSl1)\ **Replies:** 4\ **Last updated:** [5 December 2025 17:54 UTC](https://community.victronenergy.com/t/gx-modbus-register-of-battery-capacity/49814 "2025-12-05T17:54:11Z")
What are the modbus registers of the battery values Installed and Available Capacity ? These values are listed in the gui of the gx device. See my screenshot: I didn’t find it in the “CCGX-Modbus-TCP-register-list-… --- ## [Dbus-device-names](https://community.victronenergy.com/t/dbus-device-names/49751)
**Author:** [@miguel.martin](https://community.victronenergy.com/u/miguel.martin)\ **Replies:** 0\ **Last updated:** [4 December 2025 11:26 UTC](https://community.victronenergy.com/t/dbus-device-names/49751 "2025-12-04T11:26:26Z")
Dear Victron Support Community We are currently integrating Modbus TCP communication with the Victron equipment we have recently acquired, and we would like to ensure that we are using the correct dbus-device-names for … --- ## [EM340 (standard RS485 grid meter) connected by Modbus TCP server problem](https://community.victronenergy.com/t/em340-standard-rs485-grid-meter-connected-by-modbus-tcp-server-problem/48444)
**Author:** [@MarkBng](https://community.victronenergy.com/u/MarkBng)\ **Replies:** 0\ **Last updated:** [9 November 2025 20:46 UTC](https://community.victronenergy.com/t/em340-standard-rs485-grid-meter-connected-by-modbus-tcp-server-problem/48444 "2025-11-09T20:46:57Z")
Hi, I have a MultiPlus-II 48/5000 GX running Venus OS v3.66. My grid meter is a Carlo Gavazzi EM340 that originally came with my EV wallbox charger. The wallbox was directly connected to the EM340 via RS485. What I d… --- ## [Is it possbile to change Orion XS Battery Profile Settings automatically (Modbus, Mqtt, NodeRed)?](https://community.victronenergy.com/t/is-it-possbile-to-change-orion-xs-battery-profile-settings-automatically-modbus-mqtt-nodered/48416)
**Author:** [@Tidle](https://community.victronenergy.com/u/Tidle)\ **Replies:** 0\ **Last updated:** [9 November 2025 10:09 UTC](https://community.victronenergy.com/t/is-it-possbile-to-change-orion-xs-battery-profile-settings-automatically-modbus-mqtt-nodered/48416 "2025-11-09T10:09:16Z")
Is it possible to automate switching the input and output of a Victron Orion XS using a relay, and at the same time have the charging profile (battery type, AGM or LiFePO4) automatically adjust accordingly? Or is the cha… --- ## [Orion XS extend Modbus/MQTT register set](https://community.victronenergy.com/t/orion-xs-extend-modbus-mqtt-register-set/48322)
**Author:** [@Tidle](https://community.victronenergy.com/u/Tidle)\ **Replies:** 0\ **Last updated:** [6 November 2025 20:01 UTC](https://community.victronenergy.com/t/orion-xs-extend-modbus-mqtt-register-set/48322 "2025-11-06T20:01:08Z")
Hi again, is there any plan to expand the available Modbus/MQTT register set for the Orion devices? Right now, it’s quite limited — for example, we can’t even adjust the charge current (A) limit or toggle key functions … --- ## [Modbus TCP/UDP devices -\> Saved devices working?](https://community.victronenergy.com/t/modbus-tcp-udp-devices-saved-devices-working/904)
**Author:** [@rkapsi](https://community.victronenergy.com/u/rkapsi)\ **Replies:** 1\ **Last updated:** [18 October 2025 09:13 UTC](https://community.victronenergy.com/t/modbus-tcp-udp-devices-saved-devices-working/904 "2025-10-18T09:13:41Z")
This is maybe a dumb question but is something supposed to happen upon entering an IP address under Modbus TCP/UDP devices → Saved devices? My Cerbo GX (3.50~13) accepts happily any IP but I see no activity it trying to … --- ## [Multiplus 2 Gx per modbus über IOBroker steuern](https://community.victronenergy.com/t/multiplus-2-gx-per-modbus-uber-iobroker-steuern/47029)
**Author:** [@FrankC](https://community.victronenergy.com/u/FrankC)\ **Replies:** 1\ **Last updated:** [14 October 2025 21:27 UTC](https://community.victronenergy.com/t/multiplus-2-gx-per-modbus-uber-iobroker-steuern/47029 "2025-10-14T21:27:25Z")
Hallo zusammen, ich kann von meinem IOBroker per modbus auf die Eingangsregister zugreiden und prima verschiedene Status auslesen. Ich bekomm es aber nicht hin, den Multiplus zu steuern. :frowning: Ich möchte gern das… --- ## [Modbus: Unable to get Lynx Fuseblown Alarm](https://community.victronenergy.com/t/modbus-unable-to-get-lynx-fuseblown-alarm/12430)
**Author:** [@yktoh](https://community.victronenergy.com/u/yktoh)\ **Replies:** 1\ **Last updated:** [2 October 2025 08:56 UTC](https://community.victronenergy.com/t/modbus-unable-to-get-lynx-fuseblown-alarm/12430 "2025-10-02T08:56:26Z")
Hi , I trying to simulate a fuseblown on Lynx Smart BMS by removing one of the Fuse. The GX shows fuseblown fault but when i read data from Modbus address : 278 (Fuse blown alarm) and 1283 (ErrorCode) , these 2 address… --- ## [Are there Modbus registers that I can write to to show AC Loads and Inverter / Charger status?](https://community.victronenergy.com/t/are-there-modbus-registers-that-i-can-write-to-to-show-ac-loads-and-inverter-charger-status/44323)
**Author:** [@AaronJust](https://community.victronenergy.com/u/AaronJust)\ **Replies:** 3\ **Last updated:** [27 August 2025 23:56 UTC](https://community.victronenergy.com/t/are-there-modbus-registers-that-i-can-write-to-to-show-ac-loads-and-inverter-charger-status/44323 "2025-08-27T23:56:06Z")
I have a Victron EVCS that has its screen as shown above. It’s in a shed and I can’t run cabling down to my main switchboard due to conduit / other issues. I can communicate with the EVCS via Modbus TCP and I intend… --- ## [Using Home Assistant as energy meter for Multiplus II GX](https://community.victronenergy.com/t/using-home-assistant-as-energy-meter-for-multiplus-ii-gx/43914)
**Author:** [@GAF](https://community.victronenergy.com/u/GAF)\ **Replies:** 4\ **Last updated:** [21 August 2025 09:26 UTC](https://community.victronenergy.com/t/using-home-assistant-as-energy-meter-for-multiplus-ii-gx/43914 "2025-08-21T09:26:13Z")
To have a Victron BESS be able to have net 0, I would install an ET-112 energy meter. However, I already have something connected to my P1 port that reports house power draw to Home Assistant. Would it be possible to se… [Next page](https://community.victronenergy.com/tag/modbus-tcp/186.md?match_all_tags=true&page=1&tags%5B%5D=modbus_tcp)