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Most commercial property portfolios have sustainability ambitions. Solar panels on the roof, a battery in the basement, chargers on the forecourt. Yet CO2 emissions across many portfolios remain stubbornly high. The problem is not the hardware. It is the control layer. An EMS for CO2 reduction in real estate addresses that gap directly.
Monitoring tells you what happened. An Energy Management System (EMS) determines what happens next. That difference is precisely the difference between a sustainability report that reads well and a portfolio that actually emits less.
Real estate portfolios are investing heavily in sustainable assets, but without active control CO2 reduction remains a paper ambition.
- At Enexis Best, an EMS delivered 50% CO2 reduction without a single kW of additional grid capacity.
- Montea, with a portfolio valued at €2.3 billion in logistics real estate, is scaling from 6 to 25 optimised sites in the Netherlands.
- CSRD requires detailed CO2 reporting from real estate companies. An EMS delivers that data automatically while reducing emissions at the same time.
- On most sites, less than half of on-site solar generation is consumed locally. Active control raises that share by tens of percentage points.
- Without control, chargers, HVAC and batteries compete for the same grid capacity at the very moments when the carbon intensity of grid electricity is highest.
The fastest CO2 reduction in real estate does not come from more hardware. It comes from smarter decisions, every quarter-hour, every hour, every day.
Reporting pressure is growing faster than the portfolio
From financial year 2025, an increasing number of real estate companies fall under the CSRD. That means detailed reporting on scope 1 and scope 2 emissions, per location, audited and comparable. For listed real estate companies such as Montea, which was included in the BEL ESG Index by Euronext in 2023, this is already a reality.
Tenants, meanwhile, are scrutinising the sustainability credentials of their buildings more closely than ever. What is the BREEAM score? What energy data can I include in my own ESG report? Landlords who cannot answer those questions will eventually lose tenants to competitors who can.
The pressure is therefore twofold: regulatory compliance and commercial pressure from the letting market. CSRD energy reporting affects real estate on both fronts. An annual sustainability report no longer suffices. You need continuous, site-specific insight into consumption, generation and emissions, together with the means to act on it.
Why monitoring does not deliver CO2 reduction
Most real estate managers already run monitoring software. They can see how much electricity each building consumes, how much the solar panels produce and what the costs are. That insight is valuable, but it changes nothing on its own.
A monitoring system records that your battery was full at 14:00 whilst the solar panels were producing at full capacity. It records that the chargers all fired up at 17:00 and caused a peak. It records that your surplus generation was exported to the grid at rock-bottom tariffs. But it prevents none of those things.
CO2 reduction in commercial real estate hinges on three levers, and none of them works without active control.
How an EMS makes CO2 reduction in real estate concrete
Effective energy management for the decarbonisation of commercial real estate starts with active control. An EMS replaces manual schedules with automated, predictive decisions. In practice, that means the system controls solar panels, batteries, chargers and HVAC in concert, per location or across an entire multi-site portfolio.
Here is how it works. The EMS calculates a new 48-hour control schedule every five minutes, based on energy prices, weather forecasts and the status of every connected asset. If the weather forecast predicts abundant sunshine tomorrow, the battery is discharged tonight so that storage capacity is available in the morning. If the EPEX price turns negative at 14:00, solar generation is directed to the battery and chargers instead of the grid. If HVAC and chargers threaten to peak simultaneously, one is temporarily curtailed.
These decisions are taken continuously. Every five minutes, 24 hours a day, per location. No human can keep up with that, certainly not across 25 sites in different countries. Software can.
Enexis Best: 50% less CO2 without additional grid capacity
The Enexis site in Best shows what active control delivers in practice. The situation was acute: a new distribution centre and maintenance workshop on a 1,750 kVA connection with just 74 kW of contracted capacity. A heavier connection was not an option; waiting times run up to ten years.
With a combination of solar panels, battery storage, charging infrastructure and an EMS controlling all assets as a single system, Enexis achieved 45% lower energy costs and 50% less CO2 at this location. Without a single kW of additional grid capacity. The system unlocked 20 to 40% more usable capacity within the existing connection.
For real estate managers, the lesson is clear: CO2 reduction and grid relief go hand in hand. You do not need to wait for a heavier connection to decarbonise. Active control makes the waiting time irrelevant.
Montea: decarbonisation that scales across 25 sites
Montea is a Belgian listed real estate company specialising in logistics property across four countries. Portfolio value: €2.3 billion, over 2 million square metres. Across six locations in Belgium, the EMS integrates solar panels, multiple battery systems and energy-intensive distribution centres into a single control system.
The system optimises via dynamic EPEX pricing: it buys cheaply, stores when profitable, and eases grid pressure at peak tariff moments. In Belgium, it simultaneously meets the frequency control requirements of grid operator Fluvius. The result: measurable cost reductions, maximum use of on-site generation, and a system that scales.
That scalability is the point. Montea is currently expanding from six to twenty-five optimised locations in the Netherlands. That expansion is only feasible because the EMS adapts to each site without requiring a new control plan per building. CO2 reduction across an entire property portfolio only works if the system scales with it. You do not want a different system, a different installer and a different dashboard for every building. You want one platform that reports centrally and controls locally.
What an EMS delivers for your ESG reporting
Beyond direct CO2 reduction, an EMS solves a second problem that real estate managers encounter with increasing frequency: the data side of sustainability reporting.
Collecting all of that manually from separate monitoring systems, meters and invoices is time-consuming, error-prone and not scalable.
An EMS that controls all assets automatically records consumption, generation, storage cycles and grid interaction per location. That data is available in real time via a central dashboard and directly usable for your BREEAM energy chapter and your CSRD reporting. No manual consolidation, no post-processing.
From ambition to proof
Real estate managers who take their CO2 targets seriously arrive at the same conclusion sooner or later: hardware alone is not enough. Solar panels, batteries and chargers are the prerequisite, but without control they structurally underperform. An EMS makes CO2 reduction in real estate measurable, scalable and auditable.
Want to know how an EMS can reduce the CO2 emissions and energy costs of your portfolio? Request a simulation. We calculate what it delivers per location, based on your own energy data.
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