Key Takeaways
- An energy monitoring system measures consumption, collects it in one piece of software and analyses it.
- Components: analysers and meters, a gateway, energy monitoring software.
- Consumption, cost and reactive ratio are monitored per line and machine.
- It reveals reactive penalties, hidden losses and peak cost early.
- With existing Modbus devices, new hardware is often unnecessary.
An energy monitoring system measures energy use in a facility, such as electricity, water, gas and compressed air, collects the data in one piece of software and analyses it. Your electricity bill gives you one number at the end of the month; an energy monitoring system shows which line, which machine and which hour that number came from.
This guide explains what an energy monitoring system is, what it is made of, how it works, what it monitors and what it brings to a business.
What Is an Energy Monitoring System?
An energy monitoring system has three layers: devices that measure in the field, the communication infrastructure that carries those measurements, and the software that shows the data. The software side is usually called energy monitoring software or an energy monitoring platform.
The goal is not only to see consumption. A good system finds losses, warns before a risk materialises and prepares the reports you need to make decisions. Measuring is the first step of energy management; you cannot manage what you do not measure.
How Does an Energy Monitoring System Work?
The system runs in a four-step loop:
- 1Measurement: Energy analysers, meters and sensors measure current, voltage, power and consumption.
- 2Collection and transmission: An IoT gateway (data logger) reads these devices via Modbus, MQTT or OPC UA and sends the data to the platform over the internet.
- 3Storage and processing: The platform stores the data and calculates values such as cost per tariff period, power factor and reactive ratio.
- 4Display and action: Data appears on dashboards, reports and alarms. When a threshold is crossed, an email, SMS or mobile notification goes out.
The loop runs continuously. Even if the internet goes down, a good gateway keeps the data in its own memory and sends it when the connection returns, so no data is lost.
Components of an Energy Monitoring System
| Component | Role | Example |
|---|---|---|
| Energy analyser | Electrical measurement per panel or line | Single-phase / three-phase analyser |
| Meter | Measures consumption at billing accuracy | Electronic meter, AMR meter, water/gas meter |
| Sensor | Environmental and process data | Temperature, humidity, pressure |
| Gateway | Reads devices and sends data to the cloud | 4G or Ethernet data logger |
| Software | Dashboards, analysis, alarms, reports | Web-based energy monitoring platform |
If your existing analysers and meters support Modbus, you often do not need new measurement devices; only a gateway and software are added.
What Does an Energy Monitoring System Monitor?
- Electricity consumption: From the main meter to sub-panels, kWh, live kW and demand per line and machine.
- Power quality: Power factor, inductive and capacitive reactive ratios, harmonics.
- Cost: Consumption and an estimated bill per day, peak and night period.
- Other energy: Water, gas, steam and compressed air.
- Production: Rooftop solar output and self-consumption.
- Environment: Temperature, humidity and process data.
What Does an Energy Monitoring System Do for You?
- Prevents reactive penalties: It warns as the reactive ratio approaches the limit, so you act before the penalty shows up on the invoice.
- Finds losses: It reveals hidden consumption such as compressors running after hours, idling motors and leaks.
- Lowers peak cost: It makes loads that switch on during expensive hours visible.
- Plans maintenance: Abnormal consumption is often the first sign of a fault.
- Simplifies reporting: Data is ready for ISO 50001 and energy manager reports.
- Verifies investments: It measures whether an efficiency investment really saves energy.
Types of Energy Monitoring Systems
Utility AMR portal: Shows main meter data. It is free but delayed, covers only the main meter and raises no alarms.
Inverter or device manufacturer apps: Show one brand's devices. They do not bring different brands together.
Cloud-based energy monitoring software: No installation; accessed from browser and mobile. Suits multi-site organisations.
On-premise energy monitoring: Chosen when data must not leave the facility. See our post on on-premise energy monitoring software for details.
Setting Up an Energy Monitoring System
Setup usually goes in this order: measurement points are defined, existing devices are checked for communication support, missing analysers are added, the gateway is connected, and dashboards and alarm rules are set up in the software. For a step-by-step walkthrough, see how to set up an energy monitoring system.
What Does the Cost Depend On?
The cost of an energy monitoring system depends on three items: the number of measurement points (how many analysers and meters), the communication infrastructure (number of gateways, 4G or Ethernet) and the software plan (device and site count). If existing devices can be used, hardware cost drops significantly.
Common Mistakes When Choosing an Energy Monitoring System
- Monitoring only the main meter and skipping the breakdown by line and machine.
- Choosing software tied to one device brand and being unable to expand later.
- Watching dashboards without alarms; if nobody is looking, the loss still appears on the invoice.
- Choosing a system that does not calculate reactive and tariff costs.
For the full list of criteria, read how to choose energy monitoring software.
Energy Monitoring with SolarTools
SolarTools energy monitoring software works brand-independently with analysers such as Schneider, ABB, Siemens, Socomec and Entes, AMR meters, solar inverters and PLCs. Consumption per line and machine, cost per tariff period, reactive ratio tracking, alarms and scheduled reports come in one platform. Sign-up is free; you can start on the Free plan up to its limits.
Frequently Asked Questions
What is an energy monitoring system?
It is a system that measures consumption such as electricity, water and gas in a facility, collects the data in one piece of software and analyses it. It consists of measurement devices, a gateway and energy monitoring software.
What is the difference between an energy monitoring system and AMR?
AMR is the utility reading the main meter remotely and gives delayed, single-point data. An energy monitoring system adds real-time data per line and machine, alarms and cost analysis alongside the main meter.
Do I need new devices to set up energy monitoring?
If existing analysers and meters support a protocol such as Modbus, usually only a gateway and software are added. Analysers are needed only where nothing is measured today.
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