Energy monitoring of the city of Ottignies-Louvain-la-Neuve

  • Year of commitment : 2015
  • CO2 Impact : The Opinum project has germinated on the basis of a simple observation. Looking at the greenhouse gas emissions emitted around the world, we note that 40% of them emanate from buildings. Opinum offers a real solution to this problem.

  • Green energies : Energy Efficiency, Other
  • Digital services : Data centers, Smart metering, Other, Cloud data solutions, Smart grid, Water, Comfort
  • Circular economy and waste management : Optimization of ressources, Save of ressources
  • Biodiversity & Ecosystems : / Environment education /

  • 30 000 €

To honor its commitment to become a carbon-neutral city by 2050, the Belgian municipality of Ottignies-Louvain-la-Neuve has deployed Opisense, the energy consumption monitoring platform developed by Opinum, to monitor The consumption of energy in its buildings. Opisense offers an intuitive and economical way to measure consumption. Since the implementation of Opisense, the city has cut its energy accounting time by 80%, reduced energy consumption by almost 30%, and can easily analyze and share its consumption data. The energy manager has earned more than 80% of his working time by automating his energy accounting. Thanks to this, it improved its communication with the occupants of buildings by showing the figures obtained thanks to the monitoring platform.

Opinum was mandated by the City of Ottignies-Louvain-la-Neuve to monitor the consumption of 114 public buildings. The city had an annual energy bill of 1,100,000 € per year. In order to carry out a consumption report, the energy manager carried out manual readings on paper (encoding errors, time to encoder to Excel spreadsheet, possible calculation errors).

Thanks to Opisense, manual readings can be carried out via Opisense INDEX mobile application or via smart meter reading. Once the data is synchronized and centralized on the Web platform, reports and alarms are automatically configurable.

Using Opisense, a subcontracting energy services company helped the city identify over 150 actions to reduce energy costs:

- Interface GTC / Modification GTC

- Monitoring of consumption

- New regulation

- Meetings with users

- Etc.

Progress Status


Data Reliability


Funding Type


Website Enterprise / Infrastructure

Sustainable Development

    Reduction in consumption and expenditure

    Increased time available for exchange between the building manager and users

    Identification of water leaks and energy wastage

    Optimization of building control based on actual occupancy

    Reducing the ecological footprint of infrastructure

    Connect to any existing hardware, new or old

    With a digitized management of the buildings, all sources of information are found in a common database, Opisense. This digitization not only reduces consumption, but also increases the comfort of the occupants.

    The building of the future will not only consume energy, but also an intelligent supply tool on the network, via the installation of photovoltaic panels and batteries.

    Almost 40% of the CO2 produced in Europe is attributable to building consumption. It is important to invest in renewable energies, but also to reduce our consumption to ensure our future.

    Empower building occupants to make better use of energy through the display of building consumption in real time.


    City of Ottignies-Louvain-la-Neuve

    Local Authority

Sustainable Solutions


    In order to improve the environmental and energy management of your

    Buildings, Opinum, an ICT company, has developed Opisense, a

    Secure Web that analyzes your energy consumption data.

    Once the data is centralized in Opisense, the system generates

    automatically analyzes and reports customized to

    save time and resources while increasing the comfort of


    Opisense connects to a wide variety of IoT sensors and systems

    automation of buildings, already present or newly installed.

    • Smart city :
    • Energy/climate :
    • Infrastructure
    • Digital services
    • Renewable energies
    • SmartGrids

Building candidate in the category

Coup de Cœur des Internautes

Coup de Cœur des Internautes

Grand Prix Infrastructure Durable

Grand Prix Infrastructure Durable

Green Solutions Awards 2017 - Infrastructures

Author of the page

  • Marie Vandaele

    Sales and Marketing Assistant


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    Green Solutions Awards 2017 - Infrastructures