Efficient and long-duration stationary energy storage with Lithium-ion batteries plays a key role in the transition towards a carbon-neutral economy within the booming increase of electrical vehicle (EV) market. A new generation of Zn batteries is offering sustainable, cheaper and safer technological alternative. In the project ZnOrgBAT a Zn stationary battery prototype with an outstanding energy density within the range 350 – 825 Wh/kg will be developed and tested in a relevant environment.