Do I need a hot water cylinder with the Addagrip EcoHeat system?

The Addagrip EcoHeat surface is installed onto a suitable base at a depth between 30-45 mm, the Pipework is covered with a larger base stone and the top coat is installed to specific depth and colour choice , it can the be connected to a thermal battery with can store excess heat for peak demand usage and there would be no need for a hot water cylinder.