Monitor your facility's electricity, water and gas consumption in real time on a single platform — and go beyond monitoring to actually manage it. Argus EMS reads Modbus/M-Bus devices, tracks transformers, UPS, generators and chillers, prevents reactive penalties and flags target-budget deviation before the month ends.
An energy monitoring and management system is software that collects, visualises and manages a facility's electricity, water and gas consumption in real time from meters and analysers, comparing every reading against a target. The monitoring layer shows what the problem is; the management layer tells you what to do about it. Energy savings appear in exactly that second layer: consumption that is not measured cannot be reduced, and a measurement never compared to a target is only a chart.
Argus EMS combines both layers on one platform: the field unit reads devices protocol-independently, the server side computes hourly and daily aggregates, and on top of that come EPDK reactive-penalty tracking, automatic month-end budget projection, sub-tenant billing and executive reporting. The result is not readings scattered across separate screens, but a single energy decision table.
The two terms are often treated as the same thing. The difference lies in what the data does: monitoring displays it, management runs it against a target. An energy monitoring and management system unites both on the same database; otherwise you get busy charts on screen and a surprise invoice at the end of the month.
| Topic | Energy Monitoring | Energy Management (EMS) |
|---|---|---|
| Purpose | Measure and display consumption | Manage consumption against a target |
| Data | Live kW, kWh, voltage, current, power factor | The same data plus target, tariff, weather and occupancy normalisation |
| Output | Charts and tables | Deviation alerts, month-end projection, invoices, board reports |
| Time horizon | Past and present | Past, present and the projected month-end |
| Decision | A person interprets the chart | The system warns before a threshold is crossed |
| Savings impact | Indirect — awareness | Direct — reactive penalties, peak shift, water leaks, budget overrun |
Automatic reading from energy analysers, meters and devices via Modbus TCP/RTU, M-Bus and SNMP.
Live kW/kWh, voltage, current, power factor and trend charts on a single dashboard.
Threshold alarms and EPDK reactive-penalty monitoring; warning before it hits the invoice.
Automatic invoice calculation, monthly budget projection and comparative reports.
A facility's energy cost is never a single line item. Electricity, water, gas and their biggest consumer — the cooling plant — are measured separately but managed together; each energy type is priced with its own tariff and the facility total comes together on one screen.
Transformer main-meter and sub-meter hierarchy, day/peak/night tariff slices, reactive energy and power quality.
M-Bus and pulse water meters; leak detection through night-flow analysis, main and sub-meter reconciliation.
Fed from a meter or the distributor portal; Sm³ consumption converted to kWh via calorific value, with invoice reconciliation.
Chiller inlet/outlet water temperature, compressor load, current and alarm monitoring; excess consumption caused by setpoints made visible.
Each energy type goes deeper on its own page: main and sub-meter separation, water leak detection, transformer monitoring and reactive penalty tracking.
Management builds a three-part loop on top of measurement. First the target is set: derived from past measured consumption, with external factors such as heating/cooling degree days and occupancy factored out. That way the target answers "what should we spend under the same conditions", not "what did we spend last year". Then the budget is built: the volume target multiplied by the unit price. Finally deviation is tracked during the month — you do not wait for month-end.
A target with weather and occupancy effects separated out, so a mild winter never looks like an efficiency win.
Unit price is carried forward flat; no speculative escalation curve is applied, and prices update when an official invoice arrives.
The measured series is the authority; month-end is projected from today using day-type patterns and recency weighting.
Reactive ratio, peak shift and budget overrun are reported as thresholds approach — before the invoice is issued.
The critical detail of this loop is on the price side. Many systems layer an estimated price increase onto future months; the result is an inflated budget that presents an increase that has not happened as if it were certain. In Argus EMS the unit price is carried forward flat: the last known price is used until an official invoice or an official tariff row arrives, and the moment an invoice is uploaded the new price is applied to the remaining months, recalculating amounts only — volume targets do not change. The number an energy manager sees on screen is a number they can defend.
Energy consumption tracking starts with measurement and ends with a report. The same data set is presented differently to three readers: the site team wants yesterday's anomaly, the energy manager wants the reason behind the monthly variance, and management wants to know where things stand against budget. Argus EMS serves all three with separate outputs.
One e-mail each morning: devices not communicating, open alarms, yesterday's measured consumption and the position against budget. The technical team starts the day without opening a screen.
When the period closes, electricity, water and gas consumption, cost and budget variance are produced as a PDF and e-mailed; the report is not compiled by hand.
Measured kWh/m³ is placed side by side with the quantity written on the invoice. If they differ, the source — index, multiplier, reactive or period shift — is opened up.
Hourly summaries make day-to-day, week-to-week and block-to-block comparison — and shift analysis — possible. Why two blocks doing the same job consume differently becomes visible here.
Because every output is fed from a single measurement layer, the numbers agree with each other: the morning digest, the chart on screen and the monthly PDF all come from the same data. For an energy tracking system that is the real difference — the answer to "where does this figure come from?" is always in the same place.
Deployment builds on existing infrastructure; no panel modification or meter replacement is required. Four steps:
Panels, meters and analysers are inventoried, and it is established which point is a main meter and which is a sub-meter. Getting this wrong double-counts consumption.
The field software unit is installed; Modbus TCP, Modbus RTU over RS-485, M-Bus and SNMP lines are connected. A local queue buffers data during outages.
Devices are matched against the ready template library and the register map is verified against values read on site. A new map is produced for any device without a template.
Tariff (day/peak/night), targets and alarm thresholds are entered; the dashboard goes live and reports are scheduled by e-mail.
Cumulative monitoring and alarms before exceeding EPDK inductive 20% / capacitive 15% limits.
Load, temperature and harmonic monitoring; overload and overheating alarms.
Critical power infrastructure: battery, fuel, running hours and ATS events.
Measurement-based savings: detecting idle consumption, peak shift and target deviation.
Energy analyser connection and data collection via Modbus TCP/RTU.
Schneider, Siemens, ABB, Socomec, Janitza, Entes — brand-independent reading.
Modbus, M-Bus, MQTT, SNMP and DSE genset protocol support.
Connecting panel analyzers to the EMS: measured quantities and integration steps.
24/7 critical power, UPS/generator backup and reactive-penalty prevention.
Tenant sub-meter billing and common-area consumption allocation.
Shift analysis, peak-demand management and reactive-power tracking.
Inverter monitoring, generation tracking and performance ratio (PR) calculation.
For the building side of the application see the building energy management page, for choosing measurement hardware see the energy analyzer monitoring guide, and for the standards side see the ISO 50001 energy management system article. If you would rather start by measuring your facility's consumption, the free calculation tools and budget projection pages are enough to begin.
Request a free demo with your existing meters and analysers — your own measurement on a live dashboard.
Explore the system with your own data in a demo session.