Victron Energy Venus OS GX (MultiPlus-II / Quattro)

Status: Vendor Confirmed · Register points: 75 · Transports: Modbus TCP

A curated ModDef profile for the Victron Energy Venus OS GX (MultiPlus-II / Quattro). Import it as victron.venus-os or load the .moddef.yaml directly.

Usage

Load the profile, bind a transport, and read a point by name. The runtime applies the offset, scaling, byte order, and sentinels from the definition.

Go

doc, _ := moddef.Load("victron-venus-os.moddef.yaml")
dev, _ := client.New(doc, "victron-venus-os", transport) // your modbus.Transport
v, _ := dev.ReadPoint(ctx, "pv_ac_output_l1_power")
fmt.Println(v)

TypeScript

import {Device} from '@moddef/core';
import {loadDocument} from '@moddef/core/node';

const doc = await loadDocument('victron-venus-os.moddef.yaml');
const dev = Device.create(doc, 'victron-venus-os', transport);
console.log(await dev.readPoint('pv_ac_output_l1_power'));

Rust

let doc = moddef_core::load("victron-venus-os.moddef.yaml")?;
let mut dev = Device::new(&doc, Some("victron-venus-os"), transport)?;
let v = dev.read_point("pv_ac_output_l1_power").await?;

Python

from moddef import Device, load
from moddef.pymodbus import Options, PymodbusTransport

doc = load("victron-venus-os.moddef.yaml")
transport = await PymodbusTransport.tcp("192.168.1.50", options=Options())
dev = Device.create(doc, "victron-venus-os", transport)
print(await dev.read_point("pv_ac_output_l1_power"))

C

md_doc_t doc;
md_doc_init(&doc, flash_ptr, flash_len);        /* zero-copy view */

md_dev_t dev;
md_dev_init(&dev, &doc, MD_STR("victron-venus-os"), &transport);

md_value_t v;
md_dev_read(&dev, MD_STR("pv_ac_output_l1_power"), &v);

C++

auto doc = moddef::Document::view(flash_bytes).value();   // zero-copy over flash
auto dev = moddef::Device::open(doc, "victron-venus-os", transport).value();

if (auto v = dev->read("pv_ac_output_l1_power"); v)
    std::cout << v->to_string() << '\n';

Measurands

The 9 semantic quantities this device reports, each linked to the measurand catalog. Query a device by measurand instead of a raw point when you want portable code.

Base quantity	Name	Unit	Description
active_power	Active Power	W	Instantaneous real power
battery_power	Battery Power	W	Battery power (sign per direction)
battery_voltage	Battery Voltage	V	Battery terminal voltage
battery_current	Battery Current	A	Battery current (sign per direction)
state_of_charge	State of Charge	%	Battery charge level
pv_power	PV Power	W	PV array / string power
pv_current	PV Current	A	PV array / string current
device_status	Device Status	undefined	Overall device operating status (enum)
fault_code	Fault Code	undefined	Vendor fault code (enum or integer)

Source

• Profile: battery-storage/victron-venus-os/victron-venus-os.moddef.yaml
• Register map: vendor documentation