Smart tariffs for air source heat pumps help you save money by using electricity when it’s cheaper. Instead of paying the same price all day, the cost of electricity changes depending on the time. For example, Octopus Energy offers a plan called Cosy Octopus, which has cheaper “off-peak” times (like early morning, afternoon, and late evening) and more expensive “peak” times (usually around 4–7 pm when lots of people use electricity). If you set your heat pump to run more during the cheaper times—like heating your home or hot water earlier in the day—you can cut your bills quite a bit. Some smart systems can even do this automatically for you. By matching your heat pump’s use to off-peak hours, smart tariffs make it easier to stay warm while keeping energy costs low. Most energy providers have smart tarifs you can look at a compare.