Unmetered
IMSERV PDA is the UK’s leading provider of unmetered supply services.
From street lighting and traffic signals to telecoms and EV charging infrastructure, we deliver expert Meter Administration and consultancy that helps you control costs, stay compliant, and streamline operations.
Book a discovery callSolutions
From data to decisions
Trusted by local authorities, energy suppliers, and infrastructure providers, we calculate over 80% of Great Britain’s unmetered electricity consumption—because precision matters.
Data that
pays for itself
What smarter data actually delivers.
Reduction in Missed Reads
£
k
of UK electricity data tracked
Top UK suppliers choose US
Audit-read Carbon Data
25
Reduction in Missed Reads
£
k
500
of UK electricity data tracked
60
Top UK suppliers choose US
100
Audit-read Carbon Data
What sets us apart
Market-Leading Coverage
– IMSERV calculates approximately 80% of Great Britain’s unmetered electricity consumption, making us the most trusted name in the sector
Specialist Meter Administration
– we offer expert Meter Administrator services for Half-Hourly Unmetered Supplies (HHUMS), ensuring accurate data flows and full compliance with industry standards
End-to-End Consultancy
From street lighting to EV charge points, our consultancy services support every stage of unmetered supply management — including inventory validation, energy forecasting, and regulatory guidance.
Seamless Integration
Feed clean, validated data straight into your platforms, with zero friction.
THE Unmetered experts
– our unmetered team has over 100 years of combined experience in the complexities of unmetered supply – we’re the industry experts
Trusted by Local Authorities & Energy Suppliers
Our long-standing relationships with councils, infrastructure providers, and energy suppliers demonstrate our reputation for professionalism, reliability, and results
MHHS Transition Expertise
With the upcoming Market-Wide Half-Hourly Settlement (MHHS) reform, our experts have the experience to guide clients through the transition, thanks to our deep technical and regulatory knowledge
What sets us apart
Powered by
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 built for action.
Read moreOur clients say it best
Proof from the people who know
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
“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
“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
“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
“We saved a substantial amount of Public funds in the first month of their advice being implemented, Power Data Associates performance is only ever one of ‘Quality and Excellence’. To state that they were a good investment would be an understatement, they are a must for any forward-thinking business.”
Birmingham City Council
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
“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
“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
“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
“We saved a substantial amount of Public funds in the first month of their advice being implemented, Power Data Associates performance is only ever one of ‘Quality and Excellence’. To state that they were a good investment would be an understatement, they are a must for any forward-thinking business.”
