IMSERV is built for what others can’t handle
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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.
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.
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
80
of Great Britain’s unmetered electricity consumption calculated
100
years of combined expertise in our unmetered team
1
UK’s leading provider of unmetered supply services
30
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
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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.
Read moreOur clients say it best
Proof From The People Who Know
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 have been instrumental in building our knowledge of the critical role that meter data plays at the core of our business – helping us with our financial planning and sustainability goals. It would have been nigh on impossible to get the data we needed without IMSERV and their proactive approach to ensuring our meters are working correctly. Their knowledge and expertise have helped me gain a far deeper understanding of the world of energy metering.”
Brewers
Client Testimonial
“Working with Power Data Associates is great value for money and takes the heavy lifting out of our energy management. Particularly the Monthly Reports they provide, which makes our data analysis SO easy. The team are always available and help sort out any issues we have”
Lancashire 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
“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 have been instrumental in building our knowledge of the critical role that meter data plays at the core of our business – helping us with our financial planning and sustainability goals. It would have been nigh on impossible to get the data we needed without IMSERV and their proactive approach to ensuring our meters are working correctly. Their knowledge and expertise have helped me gain a far deeper understanding of the world of energy metering.”
Brewers
Client Testimonial
“Working with Power Data Associates is great value for money and takes the heavy lifting out of our energy management. Particularly the Monthly Reports they provide, which makes our data analysis SO easy. The team are always available and help sort out any issues we have”
Lancashire 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
“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.”
