What is M-Bus, and why is energy metering important?

M-Bus is a standard for collecting meter data that makes energy measurement simpler, safer and more cost-effective for property owners. With M-Bus, you collect readings from electricity, heating, cooling and water meters into various systems where you can analyse, optimise and bill via an M-Bus gateway. The result is better control, clearer monitoring and a faster route from data to savings.

What is M-Bus and how does it fit into a modern property?

M-Bus (Meter-Bus) is a European standard (EN 13757) developed for reading meters in buildings and district networks. It works both wired and wirelessly and is used to transport data such as energy in kWh, volume, temperature and alarm status from meters to gateways and onwards to BMS/SCADA or cloud services. For property owners, this means you can collect the complete energy picture in a single infrastructure, regardless of the meter manufacturer. You get a stable, well-documented protocol that makes rollouts predictable, servicing easier and operating costs lower over time.

Because M-Bus is a robust protocol, you can read many meters and maintain traceability of your meter data. You reduce the need for manual readings, eliminate sources of error and improve the quality of billing and monitoring. When you can also combine electricity metering with heating and water in the same structure, you avoid parallel systems and gain a unified data model that supports future energy-efficiency projects.

How M-Bus works in practice

M-Bus (Meter-Bus) is a standardised communication solution for collecting meter data from, for example, heating, water, electricity and gas meters. In practice, M-Bus works by connecting meters to a shared two-wire bus that both transfers data and supplies power to the devices. An M-Bus gateway communicates with each meter individually and collects meter readings for onward transmission to higher-level systems. The technology is robust and enables accurate measurement even over long distances. This makes M-Bus a reliable choice for property owners who want to automate and streamline their meter data collection process.

Why energy measurement for property owners?

Energy measurement for property owners is about measuring the right things in the right places and making meter data useful in operations. When you continuously measure electricity, heating, cooling and water, you can set targets for your property portfolio. You identify abnormal baseloads, imbalances and demand peaks in order to improve efficiency and save energy and money. By presenting meter data in a way that operations teams and energy analysts can interpret and analyse, you build internal confidence and a shared focus on the measures that provide the best payback. M-Bus simplifies monitoring because you use the same route for different utility types, which both reduces complexity and improves traceability in reporting.

Energy measurement also supports regulatory compliance and reporting against climate targets. With a coordinated measurement strategy, you can deliver key figures such as kWh/m², power demand and climate impact with high data quality. You lay the foundation for energy optimisation, tenant billing and investment decisions that stand the test of time.

• Faster identification of high energy consumers
• Lower costs by reducing demand peaks and optimising operations
• Clearer billing and fairer cost allocation
• Better basis for ESG reporting and targets

From data to action: how to realise the benefits

Start where energy makes the greatest difference: main meters, selected sub-meters and high-impact loads. Ensure that you take readings at intervals that correspond to your control requirements—quickly for troubleshooting and peaks, and at longer intervals for trends and monitoring. Set alarm levels, visualise baseload and compare buildings with one another. Then connect meter data to concrete measures: operating times, setpoints, sequencing and preventive maintenance.

Get started with M-Bus in three steps

Getting started with M-Bus does not have to be difficult. Think in three steps: size, integrate and scale. With clear guidelines for addressing, documentation and secure access, you get a solution that lasts and is easy to roll out across more properties. Make sure the meters you choose support the data points your organisation actually uses, that the meters comply with the M-Bus EN 13757 standard and that they can handle the reading interval you plan to use.

Step 1: Size the network and measurement points

List your measurement points—main meters, sub-meters, tenants and energy-intensive loads—and define which values are required for monitoring and control. Choose wired or wireless M-Bus based on the building’s conditions; wireless is suitable for renovations and distributed measurement points, while wired is suitable when you can easily reach the meters with a cable. Document addresses and locations so that servicing and troubleshooting are quick. In the PiiGAB 900 Gateway, you can combine both wired and wireless M-Bus.

Step 2: Integrate with BMS, SCADA and analytics

Integrate the M-Bus gateway with your systems using established interfaces such as M-Bus, BACnet, SFTP, HTTPS, MQTT, REST API or Modbus. Validate data points and units (kWh, kW, °C) so that dashboards and alarms display the correct information. Also add standardised alarm limits for baseload, power and abnormal meter readings. Once the integration is complete, the operations team can act immediately on deviations because they receive the meter data they need for monitoring and reporting.

Step 3: Scale the portfolio and secure the lifecycle

When the first property is working, duplicate the setup. Reuse the addressing plan, naming conventions and alarm logic. Establish a routine for firmware and configuration backups, and create a checklist for onboarding new properties. With PiiGAB Connect, gateway management is quick and transparent.

Do you want to build the right M-Bus foundation from the start?

We support you throughout the entire project—from the initial technology and product choices to how the system should best be integrated with control systems, energy monitoring or IMD solutions. Whether you are starting with a single building or managing an entire property portfolio, we guide you to the right solution and ensure that your data reaches the people and systems where it creates the most value in your team’s daily work. Explore our range or contact our team for a review of your meter data collection project.

View our full range