Energy Superhub Oxford (ESO)

Ground source review: Energy Superhub Oxford (ESO)

Kensa Contracting delivers over 300 ground source heat pumps connected to ambient temperature shared ground loop arrays as part of a £41m world-first Energy Superhub built in Oxford.

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Ground source review: Energy Superhub Oxford (ESO)

The world’s first low carbon transport, power & heat energy superhub features Kensa ground source heat pumps, grid-scale energy storage, the largest hybrid battery ever deployed for EV charging points, and optimised energy trading, as a real-life model for large-scale heat and transport decarbonisation. The project is supported with funding from the UK’s innovation agency, UK Research and Innovation (UKRI), and made possible through the Prospering From an Energy Revolution (PFER) programme. The consortium partners are Oxford City CouncilPivot PowerHabitat Energy, Kensa Contracting, redT energy and the University of Oxford.

Get in touch

We are seeking to work with social landlords with clusters of housing stock ready for retrofit. To be a part of the world-first Energy Superhub Oxford project, get in touch with your Kensa representative or contact Amy at Kensa Contracting’s head office.

  • Amy Featherstone (Energy Superhub Oxford Grant Administrator)

Visit the ESO website


In April 2019 Kensa Contracting and the Energy Superhub Oxford consortium were awarded Innovate UK funding for a £41 million project which will deliver a 50MW grid balancing battery connected to superfast EV charge points, as well as 300 domestic Kensa ground source heat pumps (GSHP) with smart controls. The project aims to reduce emissions and improve public health by accelerating a switch to electric vehicles and decarbonisation of heating for homes and buildings.

Energy Superhub Oxford

How will the Energy Superhub Oxford project work?

Smart software will manage the energy storage, electric vehicle charging and heat pumps, to reduce strain on the grid and allow it to accommodate more renewables. Kensa Contracting will install new heating systems consisting of our award-winning GSHP with shared ground loop arrays and Switchee smart controls linked to a new, cloud-based platform, the Kensa Heat Optimisation Platform, that combines property information with time of use tariffs to produce an optimised heating schedule. These heating systems will be the first of their kind in the UK, and the only renewable heating solution capable of delivering domestic heating at a lower running cost than a traditional gas boiler, with no local emissions and the lowest carbon intensity of any heating. Working within strict comfort parameters, the Kensa heat optimisation platform will use the fabric of the property to store heat energy ahead of peak energy times by raising the temperature of the building when electricity is cheap allowing the GSHP to turn off when electricity is most expensive.


Ground source heat pumps and smart controls

The Energy Superhub Oxford project will integrate Kensa Shoebox heat pumps in individual properties connected to shared ground loop arrays and smart controls and dynamic energy pricing.

  • A new set of dynamic energy prices are released each day.
  • The smart control uses machine learning to create a model for heating the property based on occupant’s preference and building fabric.
  • Kensa’s heat optimisation programme combines the energy prices and heat model to create a heating schedule that balances comfort and cost.
  • The heating schedule is sent to the smart control.

Benefits for the environment

The carbon intensity of electricity roughly correlates with the cost, as electricity is cheapest when wind and solar generation is high. This means that load shifting of heating immediately reduces the carbon intensity.

Dynamic electricity tariffs offer consumers cheap energy when electricity demand is low and renewable energy is plentiful and higher prices when demand peaks.

Octopus Energy’s Agile tariff, is being recommended to ESO’s occupants, providing a 48 half-hourly price points each day, allowing households to take advantage of this dynamic pricing.

Heat can account for over 50% of a property’s energy consumption and this means that large savings can be made by heating homes outside of peak periods. The Kensa heat optimisation programme automates this ‘load shifting’ so that consumers make savings from dynamic tariffs without having to change their behaviour.

Energy Superhub Oxford time of use tariffs and sap carbon emissions for ground source heat pumps

Benefits for end users

Based on replacing night storage heaters (as per the 56 out of the 60 properties on the first phase of the ESO project with Stonewater Housing) with shared ground loop arrays and individual ground source heat pumps, produces lifetime bill savings of £15,000 – £20,000 per property (over a 40 year nominal lifetime using the ECO3 calculation methodology).

When combined with a smart thermostat and the Kensa heat optimisation platform, the predicted lifetime bill savings per property rise to £20,000 – £26,000.

Consumers will benefit from clean, renewable heat with savings of up to 25% compared to a standard ground source heating system.

The four remaining Stonewater Housing properties in the first pilot phase that are currently heated by gas already have cheaper heating and therefore savings will be lower, but even they could see lifetime bill savings of £2,000 – £5,000.

The 300 participating households in the Energy Superhub Oxford scheme with Kensa Shoebox ground source heat pumps should expect total lifetime bill savings of £2.5 – £3.5 million*.

Benefits for social landlords

By taking part in this project, our landlord partners will benefit from a reduced system installation cost as the Innovate UK grant will cover the cost of the new wet central heating system and the Switchee smart controls. In addition, all properties will receive new smart meters. Our partners will also benefit from fully funded tenant liaison and information events, delivered by Kensa Contracting and supported by the Energy Systems Catapult and the University of Oxford.

All properties will also be eligible for the Non-Domestic Renewable Heat Incentive (RHI), providing a 20 year income for the property owner. Kensa will support our customers to claim the RHI funding.

About Energy Superhub Oxford

Energy Superhub Oxford is one of four local energy system demonstrators run by Innovate UK. Representing some of the largest industrial innovation grants funded by the UK government, these projects are being supported by multiple government agencies, and are receiving national media interest. It is hoped that our partners in this project will engage with promotional activities including case studies and televised interviews.

Energy and Clean Growth Minister, Claire Perry said:

Oxford is set for a smart energy overhaul, with these projects aiming to meet the city’s energy needs through greener, low carbon technologies. Backed by government funding, this has the potential to completely change the way people go about their daily lives – from going to work on an electric bus to using the heat rising from the earth to heat your home without gas.

These projects are an example of our modern Industrial Strategy in action, helping companies and consumers seize the opportunity of the global shift to a cleaner, greener, more flexible energy system.

* Assuming the 300 property mix consists of 100 night store replacements and 200 gas replacements. Savings could be greater if displacing all night stores (£8 million) or smaller if displacing all gas (£1.1 million).

Key Facts

  • £41m world-first Energy Superhub in Oxford
  • Part-funded by UK Research and Innovation (UKRI)
  • Supports the decarbonisation of transport, power and heat
  • 300 Kensa Shoebox ground source heat pumps
  • Grid-scale energy storage
  • Hybrid battery
  • EV charging points
  • Optimised energy trading

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