Do you need someone to support your existing sub-meters?
Sub-meters provide a fantastic insight into how your energy is being used across all your sites, and when connected to EMMA AI, can transform your energy saving. However, we don’t have to provide new equipment. In many cases, your existing sub-meters can be connected to EMMA AI, and we’ll even support and maintain them for you.
What is sub-metering?
Sub-metering is the process of installing additional metering equipment to measure energy consumption at a more granular level than the main utility meter. A sub meter for electricity, gas, or water enables building owners and facility managers to track usage by floor, department, equipment, or tenant—providing a clearer picture of where and how resources are being used.
Whether it’s sub metering electricity, sub metering water, or sub meter gas installations, the goal is the same: achieve better visibility and control over consumption to identify inefficiencies, reduce costs, and improve sustainability performance.
Our existing sub-meter service
Reuses your existing investment
We work with what’s already installed on your sites, re-utilising your existing investment.
Provides targeted updates
Where meters are outdated, faulty, or incompatible, we can recommend cost-effective upgrades to keep your data continues to flow smoothly.
Offers annual checks and servicing
To ensure accuracy, our engineers run yearly inspections and calibration checks on your meters.
Connects your devices to EMMA AI
With EMMA AI, you’ll see exactly where energy is being used, wasted, or left running unnecessarily using your existing sub-meters.
End-to-end support of your devices
From connection to maintenance, we ensure your sub-meters remain a trusted source of energy data.
How we connect sub-meters to EMMA AI
Simply having sub-meters installed isn’t enough; it’s what you do with the data that counts. Many businesses find their meters aren’t connected to a central platform, meaning valuable insights are lost. At Optimal Monitoring, we integrate your existing sub-meters directly into EMMA AI, our machine learning-powered energy management system. This transforms raw meter readings into clear, actionable insights that highlight inefficiencies, identify anomalies, and uncover cost-saving opportunities across your sites.
Why supporting existing meters matters
- Protect your investment – Keep using the equipment you already have.
- Improve data quality – Regular checks ensure the information you rely on is accurate.
- Unlock AI insights – By linking sub-meters to EMMA AI, you gain intelligent analysis that identifies hidden energy waste.
- Future-proof your system – With upgrades and ongoing support, your sub-meters continue to add value year after year.
Don’t let your sub-meters go to waste — connect them to EMMA AI and put your data to work.
Our other sub-metering services
Installation of new meters
We offer end-to-end submeter installation for electric, gas, and water across commercial and industrial environments. Our expert engineers will specify, supply, and install the ideal metering setup to provide you with complete visibility of your energy usage.
Connect meter data to EMMA AI
Our team will connect your current and new sub-metering systems directly to EMMA AI, whether you’re using open protocol meters, BMS systems, or third-party APIs. As soon as your data is connected to EMMA AI, you’ll accelerate your energy/cost savings.
Sub-meting, Frequently Asked Questions
What is energy sub-metering?
Energy sub-metering is the practice of installing additional meters to measure consumption in specific areas, departments, or equipment within a building.
Why should my business use sub-meters?
Sub-meters provide detailed data that helps identify waste, improve efficiency, allocate costs fairly, and support compliance reporting.
Which organisations benefit most from sub-metering?
Large multi-site businesses, landlords, universities, hospitals, and manufacturers benefit the most, as they often require visibility across multiple energy users.
Does sub-metering help with ESOS and SECR compliance?
Yes. Accurate sub-metered data strengthens compliance reporting and makes audits more reliable.
How is sub-metering equipment installed?
Sub-meters are installed alongside your existing main meters. They can be fitted to monitor specific circuits, equipment, or areas of a building.
Our engineers assess your current setup, integrate the meters into our system, and ensure data flows securely into EMMA AI for analysis. This can usually be accomplished remotely, without any distractions to your sites.
Can sub-meters monitor more than electricity?
Yes. Sub-meters can be installed that track electricity, gas, heat, and water, providing a complete view of resource consumption.
How much does energy sub-metering cost?
Costs depend on the number of submeters required and the complexity of installation. Most organisations recover the investment quickly through the reduced energy waste that sub-meters and EMMA AI together save.
Can sub-meters integrate with energy management software?
Absolutely. Sub-meters feed detailed consumption data into platforms like EMMA AI, enabling automated analysis and real-time waste detection.
What is a sub-meter?
A sub-meter is a device that measures energy consumption for a specific area or system, separate from the main utility meter. They provide detailed insights into where and how energy is being used.
Do I need to replace sub-meters installed by another company?
Not necessarily. Optimal Monitoring can often support and integrate your existing equipment, saving you the cost of replacement.
Will integrating my sub-meters disrupt operations?
No. In most cases, connection and servicing can be completed with minimal disruption to your business, often with setup being handled remotely.
Can sub-meters help with tenant billing or internal cost allocation?
Yes. Sub-meters enable fair and accurate billing for tenants or departments by accurately tracking the energy usage of each.
Useful sub-metering links
ETL Guidance: Automatic Monitoring & Targeting (aM&T) Sub-metering Systems - Checklist & Statement Template
Government/Carbon Trust guidance on technical criteria for sub-metering equipment to qualify for the Energy Technology List
Better Buildings Partnership - Guidance Note 4.4: Advanced Metering
Helpful guidance aimed at asset/property/facilities managers. Explains remote reading, consumption data, and utility performance monitoring
An Introductory Guide to Smart Meters for the Public Sector (Gov.uk)
Includes FAQs and case studies for public sector organisations (schools, local authorities, NHS)
Harnessing the Carbon Reduction Opportunity of Sub-Metering (Energy Manager Magazine)
The article focuses on carbon reduction potential, and is often used to illustrate environmental value as well as operational cost savings