Inverter Current Sensors & Transformers

Victron Energy Meters, Current Transformers and AC Current Sensors

Accurate AC measurement lets a Victron inverter/charger manage energy intelligently. This collection covers the metering hardware that tells a MultiPlus-II or GX-based system how much power is flowing to and from the grid, a generator, or an AC-coupled PV inverter. It includes single phase and 3 phase Victron energy meters, MultiPlus-II current transformers in several lead lengths, and the Victron 40A Single Phase AC Current Sensor.

Choosing the Right Metering Option

The right product depends on your phase configuration, expected current, and how far the measurement point is from the inverter. Direct-connect energy meters carry the load current through the meter. Current transformers clamp around a conductor and send a low-level signal back to the inverter.

• Victron 100A ET112 Single Phase Energy Meter: direct-connect metering for single phase installations up to 100A. Suits grid-tied homes, tiny homes and small commercial sites.
• Victron Energy Meter EM540 and ET340 (3 phase, max 65A/phase): three phase metering for larger residential, commercial and industrial systems where each phase needs monitoring.
• Victron 100A:50mA Current Transformer for MultiPlus-II: available with 1m, 5m and 20m wire-end leads. Choose the length that reaches from the switchboard to the inverter without joins.
• Victron 400A:50mA Current Transformer for MultiPlus-II (10m Wire-End): a higher-range option for sites with larger supply currents.
• Victron 40A Single Phase AC Current Sensor: measures AC current on a single circuit up to 40A, such as the output of a PV inverter.

Why Metering Matters in Victron Systems

Without a meter or current transformer, an inverter/charger cannot see what is happening at the grid connection point. Accurate grid metering supports several Victron ESS functions:

• Self-consumption optimisation
• Feed-in limiting
• Peak shaving

It also gives clear energy data on a GX device or the VRM portal. If you are still deciding how your system should operate, our guide to selecting a grid-tie Victron ESS scenario explains where an energy meter or current transformer fits each layout.

Current transformers are a compact, low-cost-of-install option when the MultiPlus-II sits close to the main switchboard. Energy meters provide richer data and suit 3 phase systems or installations where the meter communicates with a GX device.

Compatibility Notes

The 100A and 400A current transformers listed here are specified for the MultiPlus-II, so check your inverter model before ordering. Match single phase meters to single phase supplies and 3 phase meters to 3 phase supplies. Allow enough headroom above your highest expected current: 100A for the ET112 and 65A per phase for the EM540 and ET340. Where an energy meter connects to a GX device, browse our inverter interface cables for suitable connection leads. AC metering installation in switchboards should be completed by a licensed electrician in line with Australian wiring rules.

Ready to give your inverter accurate grid and load data? Select the meter or current transformer that matches your phase setup and cable run, then complete your system with display, control and connection hardware from our full range of inverter accessories.