People spend a significant amount of time indoors. Air quality can be affected by pollutants such as CO₂, VOCs, fine particulates, mould spores, carbon monoxide and nitrogen dioxide.

Indoor conditions vary depending on the weather, season, occupancy, occupant behaviour and building design.

However, many organisations have limited data on CO₂, temperature, humidity and ventilation. Longer-term averages can also hide short periods of poor ventilation, overheating or high humidity.

Continuous monitoring reveals how conditions change throughout the day and across different spaces. It can help facilities teams:

• • • Identify poor ventilation or elevated CO₂
    • Detect overheating and temperature variations
    • Highlight humidity levels that could contribute to condensation or mould
    • Understand how occupancy affects indoor conditions
    • Balance comfort, ventilation and energy consumption
    • Measure the impact of operational improvements

4EverAirSense is powered by Lightricity’s world record-breaking photovoltaic cell technology. According to Lightricity, its PV cell is six times more efficient than other cells on the market and can operate in indoor light levels below 100 lux.

This low-light performance makes the device well suited to indoor environments where natural light may be limited.

With the miniaturised device measuring less than 10cm², 4EverAirSense has been designed to make installation simple and unobtrusive. Its lightweight construction means it can be mounted using double-sided tape, avoiding complex installation work and minimising disruption.

Short and long-range versions are available, allowing the solution to be adapted for individual rooms, entire buildings and larger multi-site estates.

Collecting data is only valuable when it leads to meaningful action. By combining Lightricity’s innovative sensing technology with Optimal Monitoring’s expertise in energy and building performance, customers can gain a more complete understanding of how their spaces are operating.

The data can help organisations:

• • • Identify areas with consistently high CO₂ levels
    • Understand temperature and humidity variations
    • Highlight underused or unnecessarily lit spaces
    • Support improvements to comfort and indoor environmental quality
    • Strengthen maintenance and operational decision-making
    • Explore relationships between indoor conditions, occupancy and energy consumption

Its compact size and flexible sensor options make 4EverAirSense suitable for a wide variety of environments, including offices, healthcare buildings, schools, universities, retail sites and other multi-building estates.

Our collaboration with Lightricity brings together innovative sensing technology and Optimal Monitoring’s data-led approach to building performance. The result is a practical way for organisations to collect richer environmental data, understand their buildings more clearly and make better-informed decisions.

image credits: Blenheim Palace

EMMA AI is a unique Artificial Intelligence (AI) platform that measures energy consumption across your individual sites, pinpointing exactly where money is being wasted and taking proactive measures to reduce the waste – all without having to install a single piece of equipment!

EMMA AI is a unique Artificial Intelligence (AI) platform that measures energy consumption across your individual sites, pinpointing exactly where money is being wasted and taking proactive measures to reduce the waste – all without having to install a single piece of equipment!

An electricity meter is a device used which measures the energy consumption of homes and businesses over a period of time.

It has become a vital tool for electricity suppliers, who use it to calculate customers’ consumption and subsequent bills.

According to the National Institute of Standards and Technology (NIST), a smart meter is an advanced metering device that measures energy consumption digitally and automatically communicates data between the meter and the utility provider (the organisation that manages and owns the metering infrastructure).

Compared to traditional electricity meters, smart meters make the process more efficient, accurate and reliable because readings are collected and transmitted automatically, reducing the risk of estimated bills and human error.

With regards to the smart meter, there is no single, widely recognised inventor, due to the evolving nature of technology overtime, and the persistent developments to the electricity meter models.

However, in 1972, a man named Theodore Paraskevakos developed a digital remote monitoring system capable of transmitting utility meter readings over telephone lines. One of Paraskevakos’ companies, Metretek, helped to commercialise his technology in 1977, establishing the foundation for modern day smart meters.

In the 1970s however, prior to the technological advancements of the modern day, smart meters were typically found in larger corporations as opposed to households. It was only in the late 2000s that meters into the home became widely available to the public.

From 2009 onward, smart meters have gradually replaced traditional electricity meters. As previously mentioned, this is due to developments in the technology as well as declining costs of producing smart meters since the 1970s.

In the UK, smart meters form part of a major programme to modernise the country’s energy infrastructure. They are gradually replacing traditional analogue meters in homes and small businesses across Great Britain, automatically recording consumption and sending readings securely to energy suppliers. This reduces the need for manual readings and allows bills to be based on actual rather than estimated energy use.

Smart meters can also provide consumers with almost real-time information, helping them understand when and how they use energy. More widely, access to detailed consumption data supports flexible tariffs and helps the energy system balance supply and demand more effectively. So, smart meters are an important part of the transition towards a more efficient, flexible and lower-carbon energy network.

The electricity meter has changed significantly since the first mechanical models were developed in the late nineteenth century. What began as a relatively simple device for measuring electricity consumption has gradually evolved into digital technology capable of recording, communicating and analysing detailed energy data.

Each stage of this development has helped make energy measurement more accurate, efficient and convenient. Modern smart meters not only improve the way readings are collected and bills are calculated, but also give households, businesses and energy suppliers greater visibility of consumption. As energy systems continue to develop, metering technology is likely to play an increasingly important role in helping people manage energy more effectively and supporting the UK’s transition towards a smarter and more sustainable future.

EMMA AI is a unique Artificial Intelligence (AI) platform that measures energy consumption across your individual sites, pinpointing exactly where money is being wasted and taking proactive measures to reduce the waste – all without having to install a single piece of equipment!

Playing Games With AI

Jon Slinn – June 2026

I was on holiday recently and that, for my family means games… lots of them. I mean of course sun, swimming, eating too much etc. but lots of games as well.

One of the favourites is Castle Combo. Full credit to the designers, Grégory Grard, Mathieu Roussel and their publisher Catch Up Games. It really is great, so if you are looking for a present for the game fan in your clan I recommend it.

In short, what you are aiming to do is maximise a score where scoring mechanisms can either re-enforce each other or conflict. There are trade-offs and choices to make as you select and lay cards in a 9 by 9 grid (or tableau as the game calls it).

The final score is determined by the rules denoted by the section at the foot of each card with the red numbers.

So, in the tableau in question, here there is the following image on card two:

This means 2 points for every coin in the purse.

There are 4 coins in the purse (you will see them stacked on the game image below) which is the maximum for this card. So that’s 8 points total at the end of the game.

         * note the ‘4’ on the bag above means that’s the maximum capacity of the bag

The team at Optimal Monitoring

For some of the team, ditching the mower for periods of time is already part of their normal routine.

Our CCO, Jon Slinn, avoids mowing his lawn at this time of year because the daffodils need time to recharge their bulbs after flowering. In other words, he is saving electrical power while the plants store natural chemical power.

Very efficient. Very on brand.

Saving energy

Taking part in campaigns such as No Mow May are a great reminder that saving energy is not always about making big changes. Sometimes, it is about doing less at the right time. Every lawnmower left unused saves a little bit of electricity or fuel.

Plantlife has previously estimated that Britain’s lawns could be cut as many as 30 million times a year under a weekly mowing regime, which would be equivalent to 45 million litres of petrol and around 80,000 tonnes of carbon dioxide emissions.

That is why one garden might not feel like much, but when more households, businesses, schools and communities get involved, those small savings begin to add up.

Conclusion

At Optimal Monitoring, we spend a lot of time helping organisations spot waste, reduce energy use and make smarter decisions. No Mow May is a lovely example of the same thinking applied at home: less intervention, less energy, more benefit.

So this month, we are embracing slightly wilder lawns, more flowers and hopefully a few extra bees.

Less mowing. More wildlife. Lower energy use. Happier pollinators.

That sounds like a win to us.

1. Kilowatt-hour (kWh)

It sounds technical.
It’s actually simple.

A kWh is just a unit of energy used.

If a 1,000-watt appliance runs for one hour, that’s 1 kWh.

Your electricity bill is basically:

kWh used × price per kWh = your cost

If you reduce usage, you reduce spend. It’s that direct.

2. Heat Pumps

Electric heating systems that move heat rather than generate it.

They pull warmth from air, ground or water.

Why they matter:

• Lower running costs than gas boilers
• Lower carbon emissions
• Higher upfront cost

Great for long-term savings. Less ideal if capital budget is tight.

3. Green Energy

Electricity from renewable sources like:

• Wind
• Solar
• Hydro
• Biomass

It produces little or no carbon.

Important to know:
Buying “green” energy doesn’t automatically reduce how much energy you use.

Efficiency still matters more than labels.

4. Great British Energy

A proposed publicly owned clean energy company announced by the UK government.

Its goal:

• Invest in renewables
• Improve energy security
• Reduce reliance on imports

It doesn’t directly affect your bill today.
But it may shape future supply and pricing.

5. Smart Meter

A digital meter that automatically sends readings.

No manual submissions. No estimates.

Modern meters (SMETS2) send half-hourly data, which allows:

• Accurate bills
• Usage tracking
• Identifying waste

For businesses, the data is often more valuable than the meter itself.

6. Net Zero

Balancing the carbon you produce with the carbon you remove.

In short:

Emit less. Offset the rest.

The UK’s target is 2050.

For SMEs, this usually means:

• Reducing energy use
• Switching to cleaner energy
• Tracking emissions

Cost savings and carbon reduction often go hand in hand.

7. Ofgem

The UK’s energy regulator: Ofgem

They:

• Set market rules
• Protect consumers
• Monitor suppliers

They don’t sell energy.
They police the system.

8. Inflation (Energy Context)

General price rises across the economy.

For energy, that means:

• Higher wholesale costs
• Increased network charges
• Supplier costs rising

Even if you don’t use more energy, your bill can still increase.

That’s why efficiency protects you from price volatility.

9. Energy Price Cap

A limit on what suppliers can charge households.

Key point:

It does NOT apply to businesses.

Commercial energy contracts are market-based.

So SMEs must manage usage and procurement carefully. There’s no safety net.

10. Department for Energy Security and Net Zero (DESNZ)

The government department responsible for UK energy policy:
Department for Energy Security and Net Zero

They shape:

• Energy security
• Legislation
• Net Zero strategy
• Business reporting rules

If regulations change, it usually starts here.

The takeaway for SMEs

You don’t need to memorise every term.

But you should understand three things:

1. How much energy you use
2. Where waste happens
3. What actions cut costs fastest

Because energy savings aren’t driven by jargon.
They’re driven by visibility and control.

If you can see the data clearly, decisions get easier. And cheaper.

Understanding the terminology is only the start.

What really matters is visibility.

When you can clearly see how and where energy is used, cutting waste becomes straightforward.

Optimal Monitoring supports larger and multi-site businesses directly, while smaller organisations can often access the same insight through our partners.

Because better data, not more jargon, is what reduces costs.

Get in touch to find out how automated energy management could help your business unlock savings.

Useful links

Intelligent Automated Energy Management Software
Discover how EMMA AI enables proactive energy reduction and performance tracking

How to Reduce Energy Costs in Commercial Properties
Actionable insights to reduce operational energy usage and expenses

Learn More About MHHS
Stay up to date with the latest information on Market-wide Half Hourly Settlement (MHHS)

A changing energy system means greater business risk

For years, energy management focused largely on efficiency and procurement. Today, the challenge is broader.

The location of new generation capacity, changes to grid infrastructure and the cost of funding decarbonisation will increasingly influence how much organisations pay for energy and where pressures emerge geographically. What happens nationally is now directly felt at site level.

This makes forecasting harder and reactive management riskier.

Waiting for monthly bills to understand performance is simply too slow. By the time costs are visible, the opportunity to manage them has passed.

Forward-thinking organisations are responding by treating energy as live operational data rather than a historical utility expense.

From periodic reporting to automated energy management

Traditional reporting cycles were built around hindsight.

Monthly invoices and quarterly reviews explained what had already happened but offered little opportunity to intervene in real time.

That model no longer works.

Automated energy management, supported by continuous monitoring, analytics and alerts, is quickly becoming the standard for commercial estates. Instead of relying on manual analysis, energy monitoring software now captures detailed half-hourly or sub-hourly data across every site and asset, automatically highlighting inefficiencies and abnormal behaviour as it occurs.

This shift transforms how energy teams operate.

Rather than spending time collecting data and producing reports, they can focus on action:

• identifying out-of-hours usage
• spotting plant running inefficiently
• optimising schedules
• benchmarking sites
• and prioritising improvements with the strongest return

The result is faster decisions, fewer surprises and measurable cost reductions.

In short, automated insight replaces manual investigation.

Compliance is becoming continuous, not occasional

Regulation is also changing the rhythm of energy management.

Frameworks such as Energy Savings Opportunity Scheme (ESOS), Streamlined Energy and Carbon Reporting (SECR) and Scope reporting already require accurate, auditable information. The introduction of Market-wide Half-Hourly Settlement (MHHS) will go further, fundamentally altering how electricity consumption is measured and settled.

Under MHHS, half-hourly data will underpin billing and market participation. Organisations without reliable, granular data risk higher costs and reduced control.

This reinforces a simple reality: compliance cannot be treated as an annual project.

It needs to be embedded into daily operations.

When energy data is automatically captured through a commercial energy management system, reporting becomes easier and more reliable. When it isn’t, teams are left scrambling to piece together spreadsheets.

Good operational visibility naturally supports ESOS compliance and MHHS readiness. Poor visibility creates stress and uncertainty.

Proving ROI is now essential

Another shift is commercial.

Energy managers are increasingly expected to speak the language of finance as well as engineering. Senior stakeholders want to understand not only how energy is used, but what improvements deliver in real terms.

That means moving beyond kilowatt-hours and focusing on pounds saved.

Clear financial context changes everything. When an inefficiency can be shown to cost £30,000 per year, action becomes far easier to justify than when it is presented as a technical anomaly.

Modern energy data analytics allow teams to quantify waste, forecast savings and demonstrate results over time. This evidence-based approach turns energy management into a strategic contributor rather than a background function.

For many organisations, this visibility is the difference between stalled initiatives and approved investment.

The biggest savings are often hidden in day-to-day operations

Large estates rarely lose money through one dramatic failure.

Instead, waste tends to accumulate quietly across dozens or hundreds of small issues: heating and cooling running simultaneously, equipment left on overnight, poorly configured controls or buildings operating at full capacity while half empty.

Individually these problems appear minor. Collectively they can add up to significant sums.

Because they do not trigger alarms, they often remain invisible to traditional audits.

Continuous monitoring changes that.

By comparing sites and tracking patterns over time, energy managers can quickly identify anomalies and focus on operational optimisation before considering expensive capital projects. In many cases, simply running existing assets more intelligently delivers faster and more reliable returns than large infrastructure upgrades.

This is particularly important in an environment where budgets are tight and quick wins matter.

Preparing for a more dynamic energy market

The wider energy system is becoming increasingly data-driven and dynamic. Pricing structures are evolving, grid flexibility is growing, and settlement periods are shortening.

In this environment, understanding how consumption changes throughout the day becomes commercially valuable.

Organisations that can analyse load profiles and adjust behaviour accordingly will be better positioned to control costs. Those operating with delayed or incomplete information will struggle to respond.

This is where robust energy monitoring software provides a clear advantage, enabling teams to see exactly how and when energy is used across their estate and make informed decisions quickly.

Better data does not just improve reporting. It directly influences purchasing strategy and operational resilience.

The expanding role of the energy manager

All these changes point to a broader evolution in the role itself.

Energy managers are increasingly expected to act as strategic advisors, influencing decisions across facilities, finance and sustainability teams. Their remit now includes risk management, cost reduction and long-term planning.

To fulfil that role effectively, they need confidence in their data and the ability to communicate clearly with stakeholders.

When insights are accurate and easily accessible, energy teams gain influence. When information is fragmented, their impact is limited.

Technology alone does not create this shift, but the right systems make it possible.

How Optimal Monitoring supports modern energy teams

At Optimal Monitoring, we work with organisations facing exactly these pressures across retail, hospitality, public sector and other complex, multi-site environments.

The challenge is rarely motivation. It is visibility and time.

Our approach to automated energy management focuses on delivering clear, actionable insight without the need for heavy capital investment or complex implementation projects.

Through EMMA AI, our subscription-based energy management platform, organisations gain:

• continuous, granular monitoring across every site
• automated detection of anomalies and waste
• clear financial impact reporting
• support for ESOS and MHHS requirements
• and rapid deployment without upfront CapEx

This allows energy teams to deliver meaningful savings quickly while freeing up time to focus on strategy rather than spreadsheets.

As Duncan Everett, CEO of Optimal Monitoring, explains:

“Energy managers don’t need more reports. They need clarity. When you can see what’s happening across every site in real time, you can act faster and deliver savings the business actually feels.”

Jon Slinn, Chief Commercial Officer, adds:

“The organisations that succeed aren’t necessarily investing more. They’re simply making better decisions earlier, because they have the right information at the right moment.”

The 2026 Energy Management Blueprint

Energy management is no longer delivered through isolated projects or annual reviews. It works best when embedded into the day-to-day running of the estate, supported by continuous data, automated insight and clear accountability at every site.

The organisations seeing the most consistent savings aren’t necessarily doing more. Instead, they focus on a small number of structural improvements that create lasting visibility and control across their operations. With the right foundations in place, compliance becomes easier, decisions become faster and performance improvements compound over time.

To make planning simpler, we’ve distilled these priorities into a practical one-page Energy Management Blueprint that many teams use to shape their annual roadmap. You can download the printable version to share internally or use the summary below as a guide.

The foundations of modern, automated energy management:

1. Continuous visibility across every site– Real-time monitoring through energy management software to identify issues early
2. Automated energy management– Alerts and analytics that replace manual reporting and surface waste instantly
3. MHHS-ready half-hourly data– Accurate load profiles to support smarter procurement and settlement
4. Compliance embedded into operations– ESOS and reporting built into everyday processes, not year-end exercises
5. Financially-led decision making– Clear ROI and savings cases expressed in pounds, not just kilowatt-hours
6. Operational optimisation before CapEx– Faster, lower-risk savings from better use of existing assets
7. Site-level accountability– Shared visibility and benchmarking to drive local ownership
8. Proactive policy awareness– Preparedness for market reforms such as SSEP, NESO strategy changes and evolving charges

Taken together, these steps create a more proactive, data-led and resilient energy management strategy, one that reduces business energy costs while giving teams greater confidence and control.

Looking ahead

The difference between reactive and proactive energy management will widen in 2026.

Organisations relying on historic reports will continue explaining rising costs after the fact. Those adopting automated energy management and real-time visibility will be able to prevent waste, respond faster and demonstrate clear commercial value.

In an uncertain market shaped by policy, infrastructure and regulatory change, that control is invaluable.

If you’d like to understand where the biggest opportunities sit across your estate, you can download the 2026 Energy Management Blueprint or speak with the Optimal Monitoring team for a complimentary energy visibility review.

Because when you can see clearly, you can act confidently, and the savings follow.

Looking Ahead: Why 2026 Will Be a Defining Year

As we move into 2026, the UK Energy Market is shifting again, creating new pressures and opportunities for commercial energy management across every sector, from retail and hospitality to manufacturing, education, and healthcare. The turbulence of 2022–2024 has eased, but not disappeared, and the past twelve months have shown that volatility is no longer an occasional disruption; it is now a structural feature of the UK Energy Market.

For senior managers responsible for commercial energy management, compliance, and cost control, the question isn’t merely what is happening now,  it’s what happens next, and what proactive steps are needed to stay ahead.

This overview brings together where 2025 has taken the sector and the trends shaping 2026, offering clarity on what matters most for commercial energy management in the year ahead: stability, regulation, efficiency, sustainability, and protecting profits.

2025 in Review: Stabilisation Without Relief

After the price shocks of previous years, 2025 brought a sense of stabilisation, but not a return to “normal.” Wholesale prices settled at a higher baseline than businesses were used to pre-2020. Many organisations locked into multi-year contracts in 2023 and 2024 are now navigating renewals that remain costlier than expected.

·       Structural price pressure remained

Even with relative stability, prices did not fall to pre-crisis levels. Demand across Europe, ongoing global uncertainty, and infrastructure constraints kept commercial energy costs elevated.

·       Efficiency became an operational priority

The rise in energy intensity across sites made inefficiency more visible and more expensive. Businesses that previously relied on behavioural changes alone found that permanent operational fixes were needed to hit budgets.

·       Compliance expectations increased

With regulatory regimes such as the Energy Savings Opportunity Scheme (ESOS) requiring large enterprises within the UK Energy Market to audit and report their energy use and efficiency measures, and growing investor and stakeholder scrutiny of carbon and cost performance, 2025 was when energy reporting became less about annual documents and more about continuous performance visibility.

What’s Coming in 2026: Six Trends UK Energy Market should prepare for

2026 will bring both challenge and opportunity. Here are the forces most likely to shape the year ahead.

1.         Higher baseline costs and tighter budgets

Wholesale costs are expected to remain above pre-2020 averages, driven by demand, supply constraints, and the long-term cost of energy transition. Large businesses will tighten operational budgets, meaning energy managers must show measurable returns on efficiency work.

What this means for you:
You’ll need more accurate data on waste, quicker identification of faults, and clear visibility of which actions deliver the biggest impact. The pressure to justify savings, not just suggest them, will intensify.

2.         Rising expectations for transparent commercial energy management

Stakeholders now want more than consumption totals. They expect granularity: where energy is used, what’s driving waste, and how interventions compare across the estate.

What this means for you:
Manual reporting won’t keep pace. Systems that consolidate and unify data are becoming essential to meet reporting expectations without increasing staff workload.

3.         Regulation and sustainability pressures tightening

Although 2026 may not include a new regulatory overhaul, the direction of travel is clear. With frameworks like ESOS already in place, scrutiny from lenders, customers and investors will increase. Organisations that can demonstrate well-managed energy performance will have a competitive advantage.

What this means for you:
Clear, consistent insight will be essential. Energy managers who can quantify avoided consumption, project ROI, and support investment cases will be better placed to secure budgets.

4.         Growing complexity across commercial estates

Many businesses now operate more dispersed portfolios than ever before – part office, part remote, part hybrid, part specialist sites. This creates uneven consumption patterns and a greater risk of unnoticed waste.

What this means for you:
You’ll likely face more anomalies, more variance between sites, and a greater need for automated detection of unexpected activity. Energy strategies in 2026 must be designed around mixed estates, not just traditional portfolios.

5.         Data-driven decision-making becomes non-negotiable

The major shift in the UK Energy Market for 2026 will be a move from reactive to predictive energy management. Instead of waiting for monthly bills or quarterly reports, organisations will rely on continuous insight to prioritise fixes and prevent wasted spend. Recent public analysis shows wholesale energy prices remain subject to global factors and supply constraints, meaning unpredictability remains a feature of the market.

What this means for you:
Data will play a bigger role in everyday operations. The businesses that succeed will be those that treat energy like any other strategic resource: measured, monitored, and managed with precision.

6.         The arrival of MHHS — more granular data, smarter energy decisions

A key structural change coming into play in 2026 is the rollout of the UK-wide Market-wide Half-Hourly Settlement (MHHS). As of September 2025, the central systems required to support MHHS are live, and from October 2025 the migration of meters, including those at commercial sites, will begin.

Once fully implemented (targeted for mid-2027), MHHS will mean that electricity consumption is settled based on actual half-hourly data rather than estimates or standard profiles.

What this means for you:

• Access to much more granular data on building/site-level electricity use -enabling more precise monitoring of consumption patterns, wastage, and the impact of energy-saving measures.
• Opportunity to align procurement, demand-response and operational scheduling with real usage and potential off-peak pricing or flexible-tariff opportunities.
• Ability to underpin future energy-efficiency or decarbonisation initiatives with robust data – helping satisfy growing compliance, ESG and investor reporting demands.

For organisations serious about commercial energy management, MHHS represents a foundational shift – and one that should be integrated into planning for 2026 and beyond.

How senior managers in the UK Energy Market can stay ahead in 2026

Taken together, these trends point to a clear conclusion: 2026 will reward organisations that build resilient, insight-led commercial energy management strategies.

The landscape remains complex – but it’s more predictable than it was two years ago. The opportunity now lies in moving from firefighting to forward planning.

Senior managers who focus on the following priorities will be best positioned:

• Eliminate avoidable waste. Every uncontrolled hour of consumption has a direct cost. Quick wins and operational fixes matter.
• Strengthen reporting for compliance and investment
• Accurate, reliable energy data is increasingly essential to meet regulatory expectations and shape sustainability strategies.
• Use data to prioritise action
• Focus teams on the interventions that deliver the greatest impact – not the ones that sound most appealing.
• Support sustainability with measurable performance
• Evidence of performance, not narrative, will matter most to boards, investors, and customers.

Final Thought

2026 won’t be the easiest year for the UK Energy Market, but it may be one of the most strategically important. The organisations that embed data-led decision-making and proactive efficiency measures will not only manage costs more effectively, but also position themselves ahead of regulatory, operational, and sustainability expectations.

What is an Energy Performance Certificate (EPC)?

An Energy Performance Certificate (EPC) is a legal document that provides an energy efficiency rating for a building, from A (most efficient) to G (least efficient). It also includes recommendations for improving energy performance. Required when properties are built, sold, or rented, EPCs are vital tools in the UK’s journey towards net zero.

Each certificate is valid for 10 years and must be provided to prospective tenants or buyers before any transaction is finalised. EPCs are governed by UK regulations and are mandatory for both residential and commercial properties.

The rating is determined using a government-approved Standard Assessment Procedure (SAP) for dwellings or a similar methodology for non-domestic buildings. The assessment considers insulation, heating systems, lighting, and renewable energy technologies.

How Do You Get an Energy Performance Certificate?

To obtain an Energy Performance Certificate, a qualified Domestic Energy Assessor (DEA) or Non-Domestic Energy Assessor (NDEA) must conduct an in-person survey of the property. Here’s the typical process:

1. Book an Assessor: Use a government-accredited register to find a certified energy assessor.
2. On-site Assessment: The assessor visits the property and collects data on construction materials, insulation levels, boiler type, lighting systems, and more.
3. Calculation and Certification: Using collected data, the assessor generates an energy rating and uploads it to the national EPC register.
4. Receive Your Certificate: The certificate is made available online, complete with suggestions for improving efficiency.

Costs vary depending on property size and type, with domestic EPCs typically ranging from £50 to £120.

Why is an EPC Important?

An EPC is more than a regulatory obligation. It plays a crucial role in energy management, sustainability, and property value. Here’s why it matters:

• Regulatory Compliance: Landlords must achieve a minimum EPC rating of E to legally rent properties in England and Wales.
• Cost Savings: The EPC includes tailored recommendations to reduce energy usage, leading to lower energy bills.
• Environmental Responsibility: EPCs help identify areas where carbon emissions can be reduced, aligning with net-zero targets.
• Investment and Resale Value: Properties with higher EPC ratings tend to attract more interest and better offers.
• Funding and Grants: Some government incentives and funding options require a valid EPC with a minimum rating.

For businesses, particularly those with large property portfolios, managing EPC ratings is a strategic priority that impacts ESG performance and compliance.

How Optimal Monitoring Assists with EPC Strategy

While EPCs provide the framework, businesses need actionable data to maintain compliance and drive improvements. This is where Optimal Monitoring adds real value:

• Automated Energy Monitoring: Using our EMMA AI platform, we help clients track real-time energy consumption across sites.
• EPC Optimisation: Our analytics highlight opportunities to implement EPC recommendations cost-effectively.
• Pre-assessment Support: We guide clients through EPC readiness, ensuring your buildings are positioned to achieve the best possible rating.
• Portfolio Oversight: For large estates, our software enables prioritisation of upgrades by EPC score and business impact.
• Carbon Footprint Integration: EPC improvement plans are linked to net zero goals, delivering sustainability metrics that support ESG reporting.

By integrating EPC insights with intelligent energy management, we ensure our clients not only meet legal obligations but also gain a competitive edge in energy efficiency.

Sub-meter data gives you more than just the headline figure from a utility meter. A single main meter only shows total energy use. It doesn’t reveal which areas of the facility consume the most, which equipment is driving demand, or where waste is occurring.

Sub-meter insights uncover these variations across tenants, departments, or systems. Without them, hidden inefficiencies remain invisible. But raw data alone isn’t enough—too much detail can quickly become overwhelming. The real value comes from intelligent, automated software that interprets the information, learns patterns, and highlights the best actions to take. That’s exactly what EMMA AI delivers.

Why the main meter isn’t enough

Facilities teams often face the same recurring challenges:

• Bills that seem too high with no clear reason why.
• Disputes around tenant cost allocation in shared buildings.
• Systems like HVAC or lighting running when no one’s around.
• Difficulty in benchmarking departments or sites against each other.

Sub-metering solves the “where and what” by breaking energy down by load, zone, or responsibility. The real power lies in what you do next, turning raw data into practical action. But how do you make this automated, as nobody has the time to be analysing the huge amounts of data that sub-metering can generate?

From Circuits to Insights

Sub-metering can monitor:

• Tenant usage in multi-let buildings.
• HVAC, lighting, and other plant systems.
• Specialist loads such as EV chargers or IT suites.
• Power to remote areas like car parks or storage buildings.

On its own, this provides valuable visibility. Paired with EMMA AI, it becomes a powerful way to start saving a significant amount of money immediately. EMMA AI ingests sub-metering data in real time, then uses machine learning to:

• Flag abnormal usage patterns instantly.
• Identify systems running outside expected hours.
• Compare sites, tenants, or departments for benchmarking.
• Suggest targeted actions to cut waste and costs.

The clever part … it does this automatically, providing simple human-like guidance to the departments or individuals that need to know the most!

Smarter Management for Complex Sites

At Optimal Monitoring, we’ve deployed sub-metering across offices, universities, hospitals, retail centres, manufacturing plants and more – all environments with complex usage patterns and shared infrastructure.

Our approach ensures you don’t just collect numbers — you gain actionable intelligence:

• Recharge tenants fairly and transparently.
• Pinpoint underperforming systems before they fail.
• Focus investment on areas with the most significant return.
• Track progress against carbon and efficiency goals.

With EMMA AI integrated, the system continuously learns from your data and helps prioritise what matters most.

One System, End-to-End Support

A successful sub-metering installation is more than just hardware. We combine:

• Site-specific design and installation.
• Professional commissioning.
• Open, non-proprietary systems for flexibility.
• Full support and training.

Then EMMA AI takes over as your always-on energy analyst, ensuring the data is not only captured but actively worked with.

From Data to Decisions

Energy data without intelligence can be overwhelming. Sub-metering reveals the detail, but EMMA AI makes sense of it — highlighting inefficiencies, guiding action, and helping you stay in control.

By harnessing sub-meter data in real-time and combining it with proactive analytics, you unlock the ability to anticipate issues before they escalate. Operational teams receive clear alerts when usage deviates from normal patterns, enabling rapid intervention. This approach doesn’t just save energy—it empowers smarter budgeting, stronger sustainability credentials and measurable cost reductions across the board.

If your site has multiple tenants, unpredictable loads, or unexplained bills, combining sub-metering with EMMA AI will give you the full picture and the tools to act on it.

Discover more about EMMA AI and how it integrates with customised sub-metering solutions.