We are pleased to announce that on 21 April 2021 the business of the Passiv Group was acquired by BUUK Infrastructure and we are looking forward to being part of a larger and financially secure group of companies.

If you are a customer of the Group then your services will be uninterrupted and will be delivered to you by Passiv UK Limited. If you are a trading partner we will be in contact with you to arrange continuity of services.

For the legally minded, PassivSystems Limited passed into administration on 21 April 2021 and the administrators will be in contact with affected parties in due course.

If you require more information please call 01635 525050 or email your usual contact at PassivSystems Limited.


During this uncertain time our first priority remains staff and customer safety and well being. All of our services are running normally and activities involving home visits or other face to face interactions are complying with strict PPE and social distancing policies.

A smart energy platform for the age of the smart grid

Passiv UK have developed a range of home energy services which are changing the landscape of the energy industry. We are a pioneering company at the forefront of making energy use more efficient and more affordable for millions of households. Our motivation is to help consumers, asset owners and businesses get better value for money and to make a significant difference to global emissions.

In 2010 we were the first company to launch a smart thermostat that allowed consumers to remotely control their heating. In 2015 we became the UK’s No 1 residential Solar PV asset management services business and in 2016 we launched the world’s first predictive load management service for optimising CHP equipment on residential district heating networks. We are all about putting consumers back in control of their energy costs and providing energy asset owners with improved financial returns.


Solar PV

Maximise returns by reducing lifetime operational costs

District Heating

Increase financial returns and bankability of new schemes


Differentiate services and increase customer loyalty

Case Studies

806,512 MWh

Total generation monitored to date


Carbon tonnes equivalent saved by our customers to date


Connected Meters

* Carbon tonne saving calculation is based on the June 2015 recommended conversion factors provided by Defra as part of its Environmental Reporting Guidelines

Ready to Learn more?

Our award-winning technology increases efficiency and reduces operational costs