Energy Saving Trust Report: How Low Carbon Tech and Smart Tariffs Cut Household Bills

A new report from the Energy Saving Trust models over one million scenarios to show how UK households can cut energy bills by combining heat pumps, solar panels, and battery storage with time of use tariffs. The research finds that pairing multiple low carbon technologies with the right tariff delivers the largest savings, often without requiring households to change their behavior. Key findings include that tariff choice heavily influences financial outcomes, and that switching from a gas boiler to a heat pump is more likely to reduce bills when paired with a suitable heat pump or time of use tariff. However, the report notes that current battery costs can make storage financially unattractive despite increasing savings. The briefing also discusses the policy conditions needed to realize these savings at scale, particularly as market wide half hourly settlement approaches and more sophisticated tariffs become available.