In energy storage systems based on manipulations with solid weights, the said weights, in fact, are comprise one of the most expensive elements. Weights used in LWS are produced using the soil extracted from the construction pit for the LWS’s basement. The energy storage building has no floor slabs and is made to be a set of vertical columns connected by diagonal and horizontal braces. Four neighboring columns form a shaft for vertical transmission of a solid weight.
A combination of such solutions has made it possible to develop a flatland grid scale energy storage that can be built in places, where constructing a PHS could only be an economically viable alternative, if a landscape elevation or a natural water source was present.