Victron Energy VM-3P75CT Energy Meter, Single and Three-Phase, 75A CTs, VE.Can, Ethernet

Overview

The Victron Energy REL200300100 is a VM-3P75CT energy meter for measuring AC power and energy in single-phase, split-phase, and three-phase Victron power systems. It supports direct voltage measurement from 85 to 265 VAC line-to-neutral and 150 to 460 VAC line-to-line, with 75 A current measurement through the included split-core current transformers.

This meter is a useful fit for boats and marine electrical installations that use Victron inverter/charger equipment and a GX device for system monitoring. It can report power and energy data over VE.Can or Ethernet, so the readings can be viewed through a Cerbo GX, Ekrano GX, VictronConnect, and the VRM Portal.

The VM-3P75CT is for protected indoor installation only. Its IP20 enclosure and -10 to +55 °C operating range make it better suited to an electrical panel, equipment locker, or dry technical space rather than an exposed cockpit, lazarette, or washdown area.

Key features

• Measures power and energy in single-phase, split-phase, and three-phase AC applications.
• 75 A rated current measurement using included split-core current transformers, so existing conductors do not need to be cut for CT installation.
• Communicates through VE.Can with two RJ45 connectors or through Ethernet using Modbus UDP.
• 100 ms refresh rate helps Victron systems track AC loads, grid import, feed-in, generator output, or PV inverter output with responsive data.
• Works as a grid meter in many MultiPlus and Quattro systems, with configuration available through VictronConnect when the role or IP settings need to be changed.
• Self-powered via L1-N, with low consumption of 1.45 W / 3.1 VA.
• Compact 90 x 71 x 59 mm enclosure fits into many AC distribution panels and technical compartments.
• Polycarbonate enclosure with IP20 protection for dry, indoor electrical spaces.
• Safety standard EN-IEC 61010-1 and Cat. III overvoltage category for use in fixed AC electrical installations.

Electrical and system integration

The VM-3P75CT connects into the AC side of a Victron system and sends measured values to the monitoring network rather than switching or converting power itself. On a vessel, that makes it practical for tracking shore power, generator input, AC loads, or inverter and inverter/charger output where the installation layout supports the required wiring.

The unit can connect to a GX device through VE.Can using the supplied terminators, or through Ethernet on the same local network as the GX device. This is useful in larger marine power systems where the energy meter is mounted in an AC panel and the GX display or gateway is located elsewhere on board.

Installation and fit

The included split-core current transformers clamp around insulated conductors and are matched to their input channels. Keeping each CT on the correct phase and facing the correct direction matters for accurate readings, especially in three-phase systems where phase order and load direction affect the displayed values.

Voltage connections use screw terminals, and the CT connections use included pluggable screw terminals. A disconnecting device is required for the installation and is not included, so the final wiring should be planned as part of the vessel’s AC distribution system and completed by a qualified installer familiar with marine AC practice.

Use cases on board

This meter suits boats using Victron monitoring where AC energy data needs to be visible alongside battery, inverter, charger, and solar information. It is especially relevant for cruising boats, workboats, and larger yachts with shore power, generator input, inverter/charger systems, or onboard AC loads that need clear monitoring through a GX device and VRM.

What’s included

• Victron VM-3P75CT energy meter with 3 input terminal blocks.
• 3 split-core current transformers wired ready for connection.
• 640 mm current transformer wire length.
• 2 VE.Can terminators.