Unmetered

The UK’s Definitive Unmetered Specialist

We manage 80% of Great Britain’s unmetered electricity. From street lighting to EV charging, IMSERV is the definitive unmetered supply (UMS) specialist.

Having acquired Power Data Associates (PDA) in 2023, we are proud to provide the tools to manage unmetered supplies efficiently and intelligently. Costs, compliance and carbon can be controlled just as easily as for metered energy.

Discover PDA

Solutions

Your Unmetered Challenge, Solved

UMS is used for equipment like telecom cabinets, traffic signals, CCTV and more – essentially, whenever installing a meter isn’t practical. Since usage is estimated, it must be accurate. And this can’t be guesswork; it’s backed by law. The Unmetered Supplies Operator (UMSO) is the role that enforces these rules. We make sure your relationship with the UMSO stays accurate and compliant, taking care of essentials like connection agreements, inventory management and UMS Certificates.

Unmetered Consultancy

UMSO

Unmetered Supplies Operator (UMSO) Services

Unrivalled Unmetered Energy Services

Our unmetered expertise is built on trust – take a look at our track record.

of Great Britain’s unmetered electricity consumption calculated

years of combined expertise in our unmetered team

UK’s leading provider of unmetered supply services

years as an accredited agent

of Great Britain’s unmetered electricity consumption calculated

100

years of combined expertise in our unmetered team

UK’s leading provider of unmetered supply services

years as an accredited agent

What sets us apart

Absolute Authority

We manage 80% of Great Britain’s unmetered electricity, acting as the trusted authority for this market.

Full Lifecycle Consultancy

Our strategic consultancy supports the entire lifecycle of unmetered supply, including inventory validation, energy forecasting and regulatory guidance.

Over 100 Years of Unmetered Expertise

Our specialist team brings over 100 years of combined experience to eliminate complexity and guarantee professionalism across every partnership.

Futureproofing Your Data

We ensure seamless, friction-free data integration while guiding your organisation through critical reforms, like the Market-wide Half Hourly Settlement (MHHS) transition.

What sets us apart

Absolute Authority

We manage 80% of Great Britain’s unmetered electricity, acting as the trusted authority for this market.

Full Lifecycle Consultancy

Our strategic consultancy supports the entire lifecycle of unmetered supply, including inventory validation, energy forecasting and regulatory guidance.

Over 100 Years of Unmetered Expertise

Our specialist team brings over 100 years of combined experience to eliminate complexity and guarantee professionalism across every partnership.

Futureproofing Your Data

We ensure seamless, friction-free data integration while guiding your organisation through critical reforms, like the Market-wide Half Hourly Settlement (MHHS) transition.

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IMSERV Astral

Astral is the intelligence layer behind it all. It brings together your data, alerts, assets and reports, in one secure, enterprise-ready platform.

Proof From The People Who Know

Client Testimonial

“Working with IMSERV throughout this process has been absolutely fantastic. They’ve taken ownership of resolving issues – even though they’ve been not of their own making – and by doing so have saved me a significant amount of time and headache. Their problem-solving has been fantastic, and I’m looking forward to developing our business relationship as we grow.”

Alex Henney

Managing Director, Squab Storage

Client Testimonial

“Having a service review meeting with our Power Data Associates Account Manager was one of the most useful meetings I have been to for some time. To say it was a worthwhile meeting is an understatement. Also, the Guidance and Information Notes produced by Power Data Associates are full of useful technical information which contributes to the effectiveness of our unmetered asset management.”

Warwickshire County Council

Client Testimonial

“Power Data Associates provide us with an incomparable wealth of specialist knowledge, invaluable guidance and assistance in all matters unmetered, their response to our request for DUoS and CRC forecasting calculations were second to none. Considering the consistently accurate data, along with the high quality of service we receive, Power Data Associates are one of our most valued and cost effective service providers.”

Cumbria County Council

Client Testimonial

“IMSERV enables us to manage our reconciliations and bills more easily, and their proactive approach means we can maintain the right level of data accuracy. We are also always looking to new innovations and technologies to help us reduce our energy use, reduce our carbon intensity and drive greater sustainability across our estate – IMSERV work closely with us to deliver the service we need.”

Neil Coleman

Energy Engineering and Innovation Manager, John Lewis Partnership

Client Testimonial

“We needed someone to guide us through the entire process – from working out how many meters, where to locate them, and ensuring they were installed correctly, through to getting the MPAN’s registered. The complexity of what needed to happen could have become overly complicated, but IMSERV’s expert managed the whole process from end to end – including liaising with all the key partners – and the whole thing was delivered seamlessly.”