PassivSystems Logo

Twitter Pitch

PassivSystems manages your home-energy use so you don’t have to – driving lower gas and electric use, smart home and better grid balancing.

Company Information

  • ECO12 Award category: Startup
  • Company name: PassivSystems Limited
  • Country of origin: United Kingdom
  • Company address: Medway House, Newbury Business Park, Newbury, Berkshire RG14 2PZ, United Kingdom
  • Founding year: 2008
  • Company status: private company
  • Website:
  • Twitter: @PassivSystemsHQ
  • Contact person: Toby Guise, PR Manager, Wagtale,
  • CEO: Colin Calder (Photo)

Colin Calder Photo

Elevator Pitch

PassivSystems is the first home-energy manager to take an integrated systems approach to analysing and managing energy use across the home from gas, electric and renewable sources. It was founded by Colin Calder in 2008 in response to the lack of integration and automation available between different systems required to create an energy efficient home. As such, the company‘s strategy is founded on increased convenience and control to the homeowner – rather than simply trying to encourage behaviour-change by providing homeowners with better information. This is achieved by combining an in-home control hub with powerful remote data analysis to provide individualised automation for each home and homeowner according their occupancy patterns and habits. PassivSystems’ advanced monitoring and analysis capability also promises to deliver a step-change in live information available to a broad range of energy stake-holders. These include: home-owners seeking to identify the most effective modification to their homes and to optimise their use of electricity tariffs or government incentives; utilities seeking intelligent fulfilment of their own efficiency obligations; power utilities seeking win-win grid balancing solutions with their customers; solar investors seeking to monitor and optimise distributed solar portfolios; and governments as they formulate incentive schemes and policies.

Smart Green Product

PassivSystem’s flagship PassivEnergy product is the first smart home-energy management system to engage with heating and hot water systems – the single greatest energy demand in Europe – and has shown an average 23% reduction in energy use owing to its unique ability to analyse both consumption and efficiency then automate heating and hot-water controls according to the user’s occupancy habits. Its algorithm takes into account the broadest range of factors, ranging from external weather data provided by the post-code to house efficiency and the user’s energy tariff. The user simply sets their weekly occupancy schedule and can then adjust it using a home controller (shown right) or their existing smartphone. The hub is open-engineered using the Linux platform in order that the occupancy habits it has learned can be used to drive a range of other appliances and manage a range of energy sources. PassivSystems empowers the homeowner not only to save energy and increase convenience but also to optimise their home. The detailed, home-specific feedback provided by Passiv’s wireless monitoring capability will allow homeowners to make the right home-improvement decisions and get the best results from government incentive programmes.

PassivEnergy Photo


  • Funding: not disclosed
  • Investors: WHEB Partners
  • Employees: 2011: 65
  • Revenues: not disclosed
  • Milestones: 10.000 Home Energy Management systems shipped in 2011. 6 Hottest products at Las Vegas CES 2010, chosen by the media. Guardian Cleantech 100 (2010), Red Herring Global 100 (2010).