During the summer months, it can generate as much as 100% of the domestic hot water required for an average household.In the winter, as much as 30% can be generated, with the remainder being provided either by a conventional boiler or electric immersion heater.On average, it will generate around 60-70% of the annual domestic hot water requirement.**  ( ** Variable saving dependent upon type of solar system used, location and usage patterns ) So why not let us help you to Save Money and Reduce your Carbon Footprint and Contact Us to arrange a free site visit today.