EV Charging Energy Metering and Monitoring Solutions for Australian Infrastructure
EV charging changes the way a site uses electricity. A car park that once had lighting and lifts may now have dozens of chargers pulling load for hours. A depot that charged nothing overnight may become one of the largest loads on the property. Without accurate metering, that new load is hard to bill, hard to manage and hard to plan.
ProSense supplies Acrel AC and DC energy metering for EV charging infrastructure across Australia, supporting projects from small AC charger installations through to DC fast charging sites, commercial charge points, fleet depots, apartments and public networks.
The role of the meter is simple, but critical. It measures how much energy the charger consumes or delivers, then makes that data available to the charger, a gateway, a billing platform or an energy-management system. When selected and installed correctly, the meter becomes a trusted data point for cost recovery, load control, reporting and maintenance.
Why EV charging needs dedicated energy metering
A general site meter shows total building consumption. That is useful, but it does not show which charger used how much energy, when it was used or how charging affected site demand.
Dedicated EV charging meters help answer practical questions:
How much energy did each charger consume?
How much energy should be billed to a driver, tenant, fleet vehicle or department?
Is a charger operating within the expected range?
Is total site demand close to the supply limit?
Can charging be shifted, paused or reduced without affecting essential loads?
How much energy is being used by EV infrastructure over a month, quarter or year?
For a single private charger, the answer may only be needed for basic cost tracking. For an apartment building, it may support resident billing. For a depot or public charging site, it can feed operating reports, energy cost allocation and charging platform records.
Good metering also separates guesswork from site design. Once energy data is available, operators can see real charging patterns rather than designing every future upgrade around worst-case assumptions.
ProSense supplies Acrel meters for AC and DC charger applications
Acrel manufactures a broad range of AC and DC energy meters used in power distribution, building services, renewables and EV charging projects. ProSense supplies Acrel metering products for Australian EV charging applications where accurate measurement and system integration matter.
Acrel has experience supplying AC and DC metering into EV charging projects, including Wallbox-related project applications using the DJSF1352-RN/D, ADL200 and ADL400 meters. These model families are commonly applied across DC and AC metering tasks, depending on the charger architecture, electrical supply and data requirements.
A typical selection looks like this:
Charger or site type | Typical metering approach | Acrel meter type |
Single-phase AC charger | Measure active energy for one charger circuit | ADL200 single-phase AC energy meter |
Three-phase AC charger | Measure three-phase energy, voltage, current and power | ADL400 three-phase AC energy meter |
DC fast charger | Measure DC energy on the charger output or DC section, subject to design | DJSF1352-RN/D DC energy meter |
Multi-charger site | Meter each charger, feeder or group of chargers | Combination of AC and DC meters |
EMS or gateway project | Connect meter data using supported communications | Meter with suitable communications option |
The exact meter choice depends on the charging equipment, switchboard design, metering position, communication method and reporting purpose. In some systems the charger has built-in metering and an external meter provides verification or upstream monitoring. In others, the external meter is the key source of measured energy data for the platform.
Metering single-phase AC EV chargers
Single-phase AC chargers are common in homes, small commercial sites, apartment car parks and workplaces. They are often used where vehicle dwell time is long and charging power does not need to be high.
For these installations, an AC energy meter such as the Acrel ADL200 can measure the charger circuit. This gives site owners a clear record of the energy used by that charger rather than relying on whole-building consumption.
Typical measured values may include:
Energy consumption in kWh
Voltage
Current
Active power
Power factor
Frequency, where supported by the meter model
For a standalone charger, this may be enough for reporting and cost allocation. For a connected charger, the meter can pass data to a controller, gateway or platform.
In apartment buildings, this is especially useful. A charger may be connected to common property power, but the energy cost needs to be assigned to one resident. With a dedicated circuit meter, the owners corporation or embedded network operator can base allocation on measured charger use.
Metering three-phase AC chargers
Three-phase AC chargers are common in commercial, workplace, public destination and fleet charging sites. They can deliver more power than single-phase chargers, but they also place a larger load on the site electrical system.
A meter such as the Acrel ADL400 can measure three-phase charger consumption. Three-phase monitoring is useful because it shows more than total kWh. It can also help identify load balance issues across phases, high current conditions and usage patterns across multiple chargers.
Three-phase AC metering supports:
Per-charger energy records for user billing or internal allocation
Load visibility across phases
Demand monitoring for sites with supply constraints
Maintenance checks when charger behaviour changes
Integration with energy controls that reduce charging load during site peaks
Commercial sites often install several three-phase chargers over time. Early metering makes future expansion easier because the operator can see real charger use before committing to transformer, switchboard or supply upgrades.
A fleet site may also use three-phase AC chargers for vehicles parked for long periods. In that case, metering helps match charging schedules to operating needs. If vehicles return in the afternoon and leave in the morning, the site can charge overnight while tracking energy per charger, vehicle group or depot area.
Metering DC fast chargers
DC fast chargers need a different metering approach. Unlike AC chargers, which supply AC power to the vehicle’s onboard charger, DC fast chargers convert AC supply to DC and deliver DC power directly to the vehicle battery system.
For DC charging systems, an Acrel DC meter such as the DJSF1352-RN/D may be used to measure DC energy in the relevant section of the charger design. DC metering can support energy records, platform reporting and system monitoring where direct DC measurement is required.
DC fast charging sites often have higher energy throughput and higher demand impact than AC charging sites. Accurate DC metering can help operators track:
Energy delivered through a DC charging circuit
Charger output trends over time
Differences between AC input energy and DC output energy, where both sides are measured
Performance issues that may need service investigation
Utilisation across a group of chargers
For public fast charging, metering data may flow through charging platforms that manage sessions, users, tariffs and reporting. For private fast charging in fleet or industrial sites, the data may feed an energy-management system or local supervisory controller.
The best location for the DC meter needs to match the charger architecture and compliance requirements. Some projects meter at the AC input, some meter the DC output, and some use both for different purposes.
How EV charger meters connect to charging platforms and gateways
Energy metering only becomes useful when the data can be read, stored and acted on. That usually means connecting the meter to one or more systems.
Common integration paths include:
Integration path | How it works | Typical use |
Meter to charger controller | The charger reads the external meter directly | Charger-based session energy records |
Meter to gateway | A site gateway collects data from one or many meters | Multi-charger monitoring and reporting |
Meter to energy-management system | EMS uses live meter data for load control | Demand control and site energy planning |
Meter to building management system | Meter data is shared with wider building systems | Apartments and commercial properties |
Meter to charging platform | Platform receives energy data via charger or gateway | Billing, user reports and asset monitoring |
Many Acrel meters support common industrial communication methods, with exact options depending on the model and configuration. In EV charging projects, RS485 and Modbus-based communication are often used between meters, chargers, gateways and controllers. Some systems then pass data onward over Ethernet, cellular or internet-connected platforms.
A practical data path might look like this:
The meter measures charger energy.
The charger controller or local gateway reads the meter.
The gateway sends energy records to a charging platform.
The platform uses the data for session records, reports or billing logic.
An EMS uses live values to reduce charging load when the site approaches a limit.
This structure keeps the metering point close to the electrical circuit while still giving remote systems access to the data they need.
Where metering fits in Australian EV charging projects
EV charging is being added to many types of sites across Australia. The metering design should reflect how the site operates, who pays for energy and how much control is needed.
Commercial charging stations
Shopping centres, hotels, workplaces and destination charging sites often need charger-level metering for user reporting and cost allocation. If chargers are available to guests or staff, the operator needs reliable energy records and simple system reporting.
Three-phase AC chargers may use ADL400 meters, while any DC charging equipment may need DC metering with a suitable DJSF series meter, depending on design.
Fleet depots
Fleet depots need metering for energy cost control, vehicle readiness and electrical capacity planning. A depot may start with a small number of chargers, then expand as more vehicles are added.
Metering helps the operator understand actual load profiles. That matters when planning staged upgrades, solar integration, battery storage or smart charging controls.
Apartment buildings
Apartments need fair energy allocation. Chargers may be installed in resident bays, visitor areas or common car parks. Metering can support resident billing, embedded network integration or owners corporation reporting.
Single-phase metering with ADL200 meters may suit smaller charger circuits. Three-phase ADL400 meters may suit larger chargers or shared charging infrastructure.
Public charging infrastructure
Public infrastructure needs high availability and clear usage data. Operators may use metering for session records, energy reports, remote monitoring and maintenance checks.
For DC fast charging, metering may include AC input measurement, DC output measurement or both. That depends on the charger, platform and compliance model.
Key design points when selecting an EV charging meter
A meter should not be selected only by current rating. The full system matters.
Start with the electrical side:
Single-phase or three-phase AC
DC measurement requirements
Direct-connected or current transformer based metering
Voltage and current range
Switchboard space and DIN rail requirements
Indoor or outdoor enclosure conditions
Then check the data side:
Required values, such as kWh, current, voltage and power
Communication method
Register map or platform compatibility
Gateway or charger controller requirements
Polling rate and logging needs
Local display requirements
Also check the commercial and compliance side:
Whether the data is for monitoring, cost allocation or trade billing
Project documentation requirements
Applicable Australian electrical and metrology requirements
Installer access and maintenance needs
Future charger expansion
For billing or trade measurement, the project team should confirm the required meter approvals and legal requirements for the specific application. Monitoring meters and billing meters may have different obligations.
The value of measuring both charger and site energy
Charger-level metering shows what each charger uses. Site-level metering shows how the charging system affects the whole property. Many projects benefit from both.
For example, a depot might meter each charger while also measuring the main EV distribution board. The charger meters support vehicle or department cost allocation. The board meter shows the total EV load and helps the EMS avoid demand peaks.
A public charging site might measure AC input energy for supply-side monitoring and DC output energy for charger performance checks. This can help identify losses, faults or unusual behaviour without relying on a single data point.
This layered metering approach is useful because EV charging is not static. Usage changes as more vehicles arrive, charger power increases and operators add solar, storage or load control.
How ProSense supports EV charging metering projects
ProSense helps project teams select Acrel metering for the electrical and data requirements of EV charging infrastructure. That can include AC meters for single-phase and three-phase chargers, DC meters for fast charging equipment, and metering arrangements that connect with gateways, charging platforms or energy-management systems.
Support can cover:
Meter selection for AC and DC charger circuits
Model matching for ADL200, ADL400, DJSF1352-RN/D and related Acrel products
Communication requirements for charger or gateway integration
Metering layouts for multi-charger switchboards
Guidance on monitoring data needed for reporting and load management
Acrel’s experience in EV charging projects, including the Wallbox project reference using DJSF1352-RN/D, ADL200 and ADL400 meters, shows how AC and DC metering can be applied across different charger types. ProSense brings that product capability into Australian infrastructure projects that need practical measurement, clear data and reliable integration.
A clear data point for every charging asset
EV charging infrastructure works best when every major load can be measured. Single-phase AC chargers need simple circuit energy data. Three-phase AC chargers need detailed phase and demand visibility. DC fast chargers may need dedicated DC metering as well as AC-side monitoring.
With Acrel AC and DC energy meters supplied by ProSense, Australian EV charging projects can build metering into the system from the start. That gives operators the information they need for cost recovery, platform reporting, energy management and future expansion, without treating metering as an afterthought.
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