If you’re wondering whether it’s cheaper to heat your water with a heat pump or a solar diverter/immersion heater, you’re not alone. As more UK homes shift to renewable heating, understanding how different systems perform is crucial; especially when it comes to hot water, which makes up a significant portion of domestic energy use.
This simple, free calculator helps you compare the electricity consumption of a heat pump versus a traditional immersion heater (including one powered by solar PV via a diverter). Just enter your cylinder volume, desired temperature rise, and the Coefficient of Performance (COP) of your heat pump, and the tool does the rest.