Gateway
ZGW-20
€999ex VAT
Connects the site hardware over Zigbee and runs Edge locally: dashboards, history, alerts and exports.
1 per site
- Cellular, EU plug
Commercial and industrial energy monitoring
Measure mains, circuits, equipment and existing meters across one site or a portfolio. Analyse and act locally in Edge, or connect the same data to the energy platform you already use.
Measure the site you have
Start at the main incomer, then add the circuits, equipment and existing meters that explain the load, without running a data cable to every point. Protection and power-quality analysis still need instruments chosen for those jobs.
See all hardware
What the monitoring system can include
| Measurement need | Connection path | Check first |
|---|---|---|
| New three-phase power and energy | ZEM-65 → Zigbee → Gateway and Edge | Current range and conductor size |
| Existing Modbus RTU equipment | RS-485 → ZMB interface → Zigbee → Edge | Register map, address and serial settings |
| Existing IP or BMS equipment | Modbus TCP, BACnet/IP or OPC UA → Edge | Point identity and write permission |
| Pulse-output meter | Meter pulse output → ZPC → Zigbee → Edge | Pulse weight and maximum rate |
| Wired M-Bus heat meter | One meter → ZHM-21 → Zigbee → Edge | Meter address and the records you need |
| Process or utility transmitter | 4-20 mA → ZIO, or 0-10 V → ZVO → Zigbee → Edge | Range, units and loop power |
A typical first site
Most projects start with the main incomer and the three largest loads on one site: one Gateway and four electricity monitors, each measuring one three-phase circuit. The same Gateway carries up to 250 devices as the site grows.
Hardware total €3,499
Excluding VAT, delivery and installation.
System Builder starts from energy monitoring with this kit in mind.
Plan the points, owners and acceptance checks with the first-site planning worksheet.
€2,500€625 eachex VAT
Measures one three-phase circuit to Class 0.5S as a system, with its current sensors connected and calibrated before it ships.
4 mains and three loads
- 120 A split-core sensors
One monitoring system, from meter to dashboard
Field devices measure the site, the Gateway connects them, and Edge stores, analyses and acts on the data on site. Other platforms can take the same data, and the site keeps collecting without them.
Use Edge on its own
Configure devices, compare data, build dashboards and run rules on site.
Explore EdgeConnect other platforms
Each connection is a flow on the Gateway that sends the readings a platform needs, in the shape it expects.
- MQTTSReadings to your broker over TLS, with a certificate for each Gateway.
- HTTPSReadings posted to your endpoint as Edge JSON or your own format.
- FilesScheduled CSV exports to FTPS or SFTP.
- Modbus serverA BMS or SCADA polls readings from Edge as Modbus TCP registers.
Understand your energy use
Compare circuits and equipment over time, investigate out-of-hours loads and check the effect of operational changes. The chart controls and sensor list stay together in one workspace.
Explore dashboards, data and automation
Compare loads
See the main incomer and individual equipment on the same timeline.
Investigate operation
Change time ranges and show or hide sensors to isolate what matters.
Alert and automate
Send an alert or run a rule when a reading crosses a limit.
Energy monitoring projects
From manufacturing to nationwide estates, these projects show how our customers and partners use EpiSensor to understand and improve energy performance.
All case studies
Energy monitoring
CoolPlanet · Manufacturing
Circuit-level measurements helped CoolPlanet find boiler trips and out-of-hours loads, then target changes to plant operation.
- 10-week payback on initial metering spend
Energy monitoring
Royal Mail · Logistics
A Cardiff pilot connected site measurements to the existing EnergyCAP platform, providing the basis for a 40-mail-centre rollout.
- Pilot followed by national rollout
Energy monitoring
ETS & Woodie’s · Retail
EpiSensor metering supplied the data for ETS and Spacewell Energy to monitor use and configure site-specific alerts across Woodie’s stores.
- 74 meters across 36 stores
Application guides for energy monitoring
Each guide names the measurement points, the hardware, the Edge setup and the commissioning checks for one kind of site or equipment.
Common questions
Common questions
How many meters can one Gateway run?
How many meters can one Gateway run?
One ZGW-20 Gateway carries up to 250 devices and around 1,000 sensor feeds. Zigbee devices form a mesh, and each hop reaches roughly 50 m indoors or 300 m outdoors, so the device count and the spacing between devices decide the layout together. Larger sites add Gateways.
What accuracy should I expect?
What accuracy should I expect?
The ZEM-65 is Class 0.5S as a system: its current sensors are connected and calibrated to the meter before it ships, so the accuracy class describes the whole measurement rather than the meter alone.
Does it keep working without the internet?
Does it keep working without the internet?
Yes. Edge runs on the Gateway, so collection, local history, dashboards and configured rules continue without an internet connection. Exports to another platform resume when the connection returns, within the limits of each integration’s buffering.
Do I need an electrician?
Do I need an electrician?
Yes. Fitting current sensors around live conductors and connecting the ZEM-65 voltage reference is work for a qualified electrician. Split-core sensors and Rogowski coils close around existing cables, so no conductor has to be disconnected.
What does a first site cost?
What does a first site cost?
A typical first site is one ZGW-20 Gateway and four ZEM-65 monitors. That hardware is €3,499, excluding VAT and delivery. Installation is quoted by your electrician.
Does monitoring make a meter suitable for billing?
Does monitoring make a meter suitable for billing?
Not on its own. Legal metrology, approvals and billing rules depend on the jurisdiction, the instrument and the commercial process, so select and approve billing meters separately from the monitoring system.
Tell us about your site
Describe the building, the equipment and the decisions you want to improve, and an engineer will work out the measurements and the system with you.