Automatic energy readings without replacing meters
Accurate data. Simple, reliable, and cost-efficient.
Managing energy in apartment buildings can be challenging, especially in older properties with mixed meter brands, no unified IT system, and growing pressure from European legislation such as the Energy Efficiency Directive (EED).
The challenges for building administrators
Requirement for monthly meter readings under the EED / EnEfG directives
Combination of legacy and modern meters without a unified communication interface
Costly and time-consuming manual readings
Multiple communication protocols (M-Bus, wM-Bus, proprietary formats)
Need to export data to billing or accounting systems
Limited or missing connectivity in technical rooms or basements
%20to%20NB%E2%80%91IoT.webp)
%20to%20NB%E2%80%91IoT.webp)
More than 1 million connected meters across Europe prove our solution works. Trusted by property managers, associations, housing co-operatives, energy companies, and municipal services
What you gain
Stress-free compliance means meeting EED requirements for monthly tenant reports through automatic data collection, while staying prepared for inspections and future directives such as EPBD. To address the complexity of technologies like LoRaWAN or NB-IoT, expert consultations help define the right technical approach, specifications, and supplier requirements, ensuring a solution that works in practice.
Works with your existing meters
Compatible with Apator, Metra, Sontex, Itron, Sensus, Techem and more – even models from 2007, if transmitting via wM-Bus.
Quick installation
One unit covers 4–6 floors. Drill, mount, power on – done in under 10 minutes.
10+ years battery life
Delivered with built-in battery and SIM card. No wiring required. IP67 casing ensures reliability even in basements or technical rooms.
Effortless EED compliance
Monthly tenant reporting is mandatory. Our devices collect data and export directly to Excel or accounting systems.
Flexible integration
Already have a system? Connect via JSON, CSV or API endpoint. Need one? We’ll recommend a dashboard.
Supported meters
Maddalena
- Maddalena RADIO EVO
- Maddalena ITN GRADUS
- Maddalena MicroCLIMA EVO
- Maddalena ARROW EVO
- Maddalena ARROW SPLIT
- Maddalena ELECTO SJ
- Maddalena ELECTO SONIC
B-Meters
- B-Meters IWM-TX3
- B-Meters IWM-TX4
- B-Meters IWM-TX1
- B-Meters HYDRODIGIT
Apator Metra
- Metra E-ITN 30
- Metra E-RM 30
- Metra E-ITN 40
- AT-WMBUS-16-2
- Apator ULTRIMIS
Sontex
- Sontex Ei6500-SA2-R
- Sontex Supercom 581
- Sontex Supercal 739
- Sontex Superaqua 1
- Sontex 566
- Sontex 556
- Sontex 587
- Sontex 868
Diehl
- Diehl SHARKY 775
- Diehl SHARKY 774
- Diehl HYDRUS wM-Bus
- IZAR RC 868 I R4
- IZAR RC 868 I G4 PL
- ARIES IS
Sensus
- Sensus iPERL 433
- Sensus iPERL 868
- Sensus MeiStream
Qundis
- Qundis Q Cal 5.5
- Qundis Q Water 5.5
- Qundis Q Module 5.5 Modularis
- Qundis Q Module 5.5 Allmess
- Qundis Q Heat 5
- Qundis Q Heat 5.5
Techem
- Techem FHKV Radio 4 OMS
- Techem Radio Module FM Radio 4
ZENNER
- ZENNER Zelsius
- ZENNER Minomess
- ZENNER IUWS wM-Bus
- ZENNER caltos E wM-Bus
ENBRA
- ENBRA ETW Modularis + modul Q module 5.5
- ENBRA ER-AM
- ENBRA Picoflux Air s wM-Bus
- ENBRA ULTRIMIS wM-Bus
- ENBRA Superaqua 1 wM-Bus
- ENBRA MT Supercal 739
Ostatní
- BFW 240 radio
- Engelmann HCA e2
- Kamstrup Multical 21
- Flamco LogoplusSonic
- Landy&Gyr ULTRAHEAT T330 (UH30…)
- AXIS Industries WFH-M
- WEHRLE modul
- Itron EquaScan eHCA
Can’t find your meter? Contact us with the model type. Once tested, we’ll add it to the supported devices list.
How to get started
Test the device
Receive 1–2 units for trial. The test units will include our SIM card to speed up the testing process.
Check performance
See live data from your building
Scale deployment
Integrate and expand across your property. We’ll complete the integration either directly into your systems or via our applications, and deliver the required number of units.
Proven in practice
"Thanks to ACRIOS, both we and our customers are fully prepared for the EED requirements. We tested the devices for several years under different conditions and now recommend them with confidence. They work reliably – and cooperation with ACRIOS is always fair and straightforward."
Jaroslav, water meter distributor, Maddalena
Bring your building into the future of energy management
Simpler readings, guaranteed compliance, happier tenants. Try our solution today.
Frequently asked question
Does it work with older meters?
Yes – if they use wM-Bus or another supported protocol.
Do we need to replace our meters?
No, your existing meters remain in place.
What if we have a mix of brands?
Not an issue – we support Apator, Metra, Sontex, Itron, Sensus, Techem and more.
How long does installation take?
Less than 10 minutes, with no wiring or inspections required.
How long does the battery last?
More than 10 years under normal use.
Is the solution secure?
Yes – data is encrypted, with remote management and OTA updates supported.
How is meter anonymity protected?
Devices use anonymised identifiers – no sensitive data needed.
Do you only supply hardware?
Yes – devices are open and ready for integration.
What network is used?
Vodafone NB-IoT with nationwide coverage in the Czech Republic.
How do I calculate total cost of ownership (TCO)?
Factor in not only device price, but also installation, data transfer, and long-term operation.
Blog
External or internal? How custom development works
External development helps organisations accelerate project delivery and reduce fixed costs. This article explores when outsourcing truly makes sense, what to consider when selecting a partner, and how to structure collaboration that delivers lasting internal peace.
Read more
Proven deployment of 10,000 wM-Bus converters for EED
Digitalisation of metering is becoming a strategic priority for utilities. Experience from a project with 10,000 wM-Bus concentrators and 850,000 meters shows that success depends less on technology itself and more on change management, coordination, and structured planning.
Read more
Choosing a remote reading system for water utilities
Digitalisation brings many ways to read water meters remotely, from bus networks to direct LoRaWAN and NB-IoT communication. Learn how to choose the right approach for your utility based on existing meters, coverage conditions, and investment strategy.
Read more
Open data interfaces pay off for reporting and integration
An open data interface means freedom and independence when working with data. Beyond storing and visualising, it enables export, reporting, automation and smooth integration with other systems. The result is greater flexibility, lower vendor lock-in and sustainable data management.
Read more
15-minute vs daily meter readings frequency explained
How often should you measure energy and water consumption? Fifteen-minute meter reading frequency supports detailed analysis and real-time optimisation, while daily data extend battery life and simplify reporting. Learn about the benefits, trade-offs, and use cases from practice.
Read more
Scripting in IoT: Flexibility, sustainability, and protection
Many IoT deployments fail when each new customer request requires a firmware change. Scripting solves that by separating customer logic from core functions, it enables faster updates, long-term maintenance, and secure control over unique features.
Read more
Gas meter data to dashboard: ACR-EX meets Datacake
Get your gas meter data online in minutes with the ACR-EX datalogger and its direct Datacake integration. This reliable NB-IoT solution provides live readings, alerts, and a ready-to-use dashboard. All without the need to develop or maintain your own backend infrastructure.
Read more
EPBD is coming: what BACS means for your building
Let’s break down what the BACS mandate, part of EU’s broader initiative EPDB directive, means in practice. Who must comply, which systems and protocols to use, and how to modernise your building with minimal effort using your existing infrastructure.
Read more
When DTLS makes sense. Know before you deploy
Let’s explore when DTLS (Datagram Transport Layer Security) brings real security value to NB-IoT deployments and when it’s smarter to choose a simpler or more energy-efficient alternative. Get clarity before committing to your next smart metering rollout.
Read more
Not your keys, not your hardware
AES encryption protects your data. But without the keys, you don’t really own the device. This article explains why requesting encryption keys matters when purchasing IoT meters, and how it gives you full control over data, integration, and long-term independence.
Read more
868 MHz or 433 MHz? The right choice for your wM-Bus
Looking for a wireless M-Bus converter but unsure which frequency band to choose? This article compares 868 MHz and 433 MHz, explains key technical differences, and offers practical guidance based on meter compatibility, signal conditions, and installation environments.
Read more
Everything you need to know, documented. ACRIOS wiki.
One place to find answers to all your technical questions. The ACRIOS wiki simplifies technical communication by bringing together everything needed for configuration, installation, and integration. Online, accessible, and continuously updated.
Read more
End-to-end custom hardware and software development
Ready-made products can work. Until they don’t. When specific requirements emerge, a custom development approach offers the flexibility to design both hardware and software precisely for the task. Whether it’s a new solution or an upgrade to existing systems.
Read more
How to collect energy data to support ISO 50001
Energy efficiency is no longer just a buzzword. With rising energy costs and increasing regulatory pressure, frameworks like ISO 50001 are becoming essential. But to optimise energy use, organisations first need one thing: structured, reliable consumption data.
Read more
Lowering IoT TCO through smart manufacturing
The price tag is just the beginning. Real savings come from what happens after deployment – device setup, integration, maintenance and optimisation. Manufacturers can make all of this easier and cheaper, without compromising on performance.
Read more
Reading Sensus meters with zero hardware changes
Unifying meter readings across different protocols doesn’t have to mean replacing hardware or relying on a single vendor. Our solution connects even legacy Sensus meters (now part of the Xylem group) into a unified system – without the need to replace your existing devices.
Read more
Why 15-minute data matters in district heating
15-minute interval readings help clarify heat pricing, detect anomalies and reduce billing complaints. They also support transparent cost allocation, a must as dynamic tariffs and EU rules raise the bar. With our converters, you can enable them without replacing your meters.
Read more
Give me a tool that works. Not a manual.
In the field, there’s no time for unnecessary clicks or second guesses. When every minute costs money, configuration needs to be fast, reliable, and dead simple. Let's have a look at what really works – and why complexity doesn’t belong at the installation site.
Read more
5 most common myths about remote meter reading
From 2027, remote meter reading will be mandatory under the European Efficiency Directive. Yet despite growing availability of the technology, many myths and half-truths still surround its implementation. Let's break down five of the most common misconceptions.
Read more
Battery-powered vs wired: What really costs more?
An externally powered data bus may look cheaper on paper. But once you factor in cabling, electrician work, inspections, and long-term upkeep, the story changes. Let's compare and reveal why battery-powered solutions often save more than just money – time, effort, and peace of mind.
Read more
Cyber Resilience Act and IoT hardware
The European Union's Cyber Resilience Act significantly reshapes hardware requirements for IoT devices – promoting secure design, manufacturer transparency, and interoperability that is essential for resilience against cybersecurity threats. Learn more about CRA.
Read more
Next-gen meter readings, no replacements needed
Discover how to modernise your metering system without the high cost of replacing existing meters. With a smart converter, you can enable seamless remote readings using your current infrastructure. Quick to deploy, easy to manage, and fully compliant with EED requirements.
Read more
Modernising metering infrastructure
Connecting different types of meters into one efficient system can be a major challenge, when dealing with various manufacturers, generations and technologies. Discover how converters offer a smart, cost-effective way to unify even the most diverse metering infrastructures.
Read more
M-Bus to IoT integration explained
Connecting M-Bus meters to IoT networks like LoRaWAN or NB-IoT is now a critical step in modern utility infrastructure. Discover four practical methods that enable reliable, scalable, and future-ready integration – without complex custom development or delays.
Read more
Understanding TCO: More than just hardware
When investing in new technology, looking beyond the initial hardware cost is more important than crucial. Discover how understanding and managing the total cost of ownership (TCO) can lead to smarter, more sustainable, and financially efficient technology investments.
Read more
NB-IoT technology: All you need to know
NB-IoT is a low-power, cost-effective IoT technology that ensures reliable connectivity with excellent coverage and security. Ideal for smart cities, industry, energy, and agriculture, it enables efficient communication for a wide range of devices. Let's discover its key features and benefits.
Read more
LoRaWAN: All you need to know
LoRaWAN is transforming the IoT with its long-range, low-power wireless communication. Ideal for smart cities, agriculture, and industrial automation, it enables efficient, cost-effective, and secure data transmission. Discover how LoRaWAN works and its key benefits.
Read more
M-Bus, wM-Bus, and RS-485: A technology guide
As cities and industries embrace digital transformation, reliable data collection and communication are essential. M-Bus, Wireless M-Bus (wM-Bus), and RS-485 technologies play a crucial role in smart metering, industrial automation, and infrastructure monitoring.
Read more
LoRaWAN vs. NB-IoT: Which technology is right for you?
As industries embrace digital transformation, many are upgrading legacy equipment to keep pace with evolving technology. The integration of smart metering and remote monitoring is turning traditional devices into key players in the rapidly expanding IoT ecosystem.
Read more
Smart metering: What it is and why it matters
Smart metering transforms energy monitoring by real-time insights into electricity, gas, and water use. By upgrading traditional meters with converters, it enables accurate billing, early issue detection, and improved grid efficiency for both consumers and providers.
Read more
IoT: Technology that saves time and money
If you have been hearing about IoT lately, you are not alone. IoT, short for the Internet of Things, is transforming the way we live and work – saving time, effort, and sometimes hundreds of euros each year and that is why we are leveraging it here at ACRIOS Systems.
Read more
ACRIOS Systems unveils its brand-new website.
We are excited to introduce new website. With a fresh design and enhanced features, we have created a more intuitive and enjoyable experience. Seamless navigation, improved functionality, and a modern look that makes finding what you need easier. Welcome to our new digital home.
Read more
Tell us what you need. We’ll find the best solution together.
Lukáš Smetana
CSO