OVO Energy and Havenwise launch heat pump trial to cut energy bills
OVO Energy and Havenwise launch heat pump trial to cut energy bills
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20 October 2025
The trial is designed to cut heating bills
It is open to some OVO customers
The Heat Pump Flex Trial was launched earlier this month and will run until March 2026
The Heat Pump Flex Trial was launched earlier this month and will run until March 2026
OVO Energy and Havenwise have announced a new program to help households cut heating bills, reduce carbon emissions and stay comfortable in the winter by using heat pumps.
The Heat Pump Flex Trial was launched earlier this month and will run until March 2026. It will let households know how flexible, data-driven control of heat pumps can lower their costs, while supporting the UK’s transition to a low-carbon energy grid.
The Trial will include selected OVO customers with Vaillant or Mitsubishi heat pumps, using Havenwise’s smart-control app and algorithms.
Henri Casteleyn, co-founder, Havenwise said that customers will be able to set their comfort preferences in the app where Havenwise will then work remotely to optimise the heat pump to use power at a greener, off peak times. Customers will remain in full control of temperature settings.
“Havenwise exists to make heat pumps better for homeowners: lower bills, easier control, fewer worries,” he said. “This partnership is the first of its kind and will show what’s possible with heat pumps.”
The trial announcement, according to Chris Watling, clean heat lead, OVO Energy, follows recent news that shows the continued decline in supplies from the UK Continental Shelf has resulted in the tightest gas supply margins in four years.
OVO’s existing Heat Pump Plus tariff add-on already enables customers with compatible heat pumps to pay just 15p/kWh for electricity used by their heat pump, helping make clean heating more affordable.
“This trial is a chance to show how intelligent heat pump control can deliver both comfort and cost savings, while supporting a greener grid, ” Watling said.
“With Havenwise onboard, we believe many households will see real benefits without needing to lift a finger.”
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Tamara BirchNewsletter and sponsored content editor
Tamara is a London-based journalist and has written about environmental topics for more than four years. This includes advising small business owners on cost-effective ways, like solar panels and energy-efficient products, to help them become more sustainable.
She has used her journalist and research skills to become highly knowledgeable on sustainable initiatives, issues, and solutions to help consumers do their bit for the environment – all while reducing monthly costs.
In addition to adopting sustainable practices in her personal life, Tamara has worked in the retail B2B space to help independent retailers think about their environmental choices and how they can help improve their business. She now uses this knowledge to help consumers do the same.
Her passion for sustainability and eco-friendly solutions stems from a long obsession with nature and animals and ensuring they feel looked after. In her free time, Tamara enjoys reading fantasy novels, visiting the gym, and going on long walks in new areas.
Max joined The Eco Experts as content manager in February 2024. He has written about sustainability issues across numerous industries, including maritime, supply chain, finance, mining, and retail. He has also written extensively for consumer titles like City AM, The Morning Star, and The Daily Express.
In 2020, he covered in detail the International Maritime Organisation’s (IMO) legislation on sulphur emissions and its effects on the global container shipping market as online editor of Port Technology International.
He also explored the initiatives major container ports and terminals have launched in order to ship vital goods across the world without polluting the environment.
Since then, he has reported heavily on the impact made by environmental, social, and governance (ESG) practices on the supply chain of minerals, with a particular focus on rare earth mining in Africa.
As part of this, in 2022 Max visited mines and ports in Angola to hone in on the challenges being faced by one of the world’s biggest producers of rare earth minerals.
His most recent sustainability-related work came much closer to home, as he investigated the eco-challenges faced by independent retailers in the UK, specifically looking at how they can cut emissions and continue to thrive.
Max lives in South London and is an avid reader of books on modern history and ghost stories. He has also recently learned to play the game Mahjong and takes every opportunity to do so. He is also yet to find a sport he doesn’t enjoy watching.
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