Microgrid with sand battery

A micro grid for 2 to 10 houses where solar panels and/or wind power generate electricity that is stored in two ways: • a common sand battery for storing energy in the form of heat • lithium batteries for short-term storage of electricity

Together, these storage methods enable the houses to be powered by self-produced energy to a very large extent. The heat in the sand battery (between 600°C and 650°C) can be saved for months to be used for heating houses and hot water. The lithium batteries are charged when the electricity grid is least stressed and are used for consumption of household electricity.

Sand is a cheap raw material and the components used for heating and extracting heat are also cheap and environmentally friendly. As a result, our product has a positive climate impact while reducing heating costs for consumers by at least 50%.

The strength of this innovation is that it is durable, cost-effective and that it can be installed in already existing houses.