The Next Stage of the Electricity Grid Investigated by IDTechEx Research


The electricity market is evolving to allow a higher integration of variable energy sources and a new class of devices is approaching the market to satisfy this necessity.  

In the new report released by IDTechEx: “Potential Stationary Energy Storage Device to Monitor”, the emerging class of energy storage devices, characterized by long storage duration and MW size power output, are investigated.

While existing energy storage devices are already populating the market, from Li-ion batteries to pumped-hydro energy storage, this new class of storage technologies will aim to complete the puzzle of the energy storage market.  

Pushed from the electrification of the automotive sector, Li-ion batteries have been deeply investigated in the last decades and are currently the standard choice for short and medium-duration storage.  

On the other end of the storage market, pumped hydro energy storage (PHES) are the main energy storage systems supporting the grid. These systems have a power capacity of GW scale (1000s of MW), and long storage time, from days upwards.

In between these two storage systems, a new group of storage devices is now approaching the market, with an intermediate power range, between MW to GW scale and an energy storage capacity that is almost indefinite.

Power and storage capacity comparison of different technologies. Source: IDTechEx Research report “Potential Stationary Energy Storage Device to Monitor  

The devices investigated by IDTechEx include:

  • Gravitational Energy Storage (GES):
    • Piston-Based GES (PB-GES)
    • Underground PHES (U-PHES)
    • UnderWater GES (UW-GES)
    • Advanced Rail Energy Storage (ARES)
  • Compressed Air Energy Storage (CAES)
  • Liquid Air Energy Storage (LAES)

The market addressed by these systems aims to improve the quality, and resiliency of the electricity grid, and distribution networks. Therefore, it is aiming to address the Front-the-Meter (FTM) section of the electricity grid.  

These devices, as investigated in IDTechEx’s new report “Potential Stationary Energy Storage Device to Monitor”, support the electricity grid providing peak-shaving service, grid deferral, and frequency regulation, among other possible services.

Moreover, because some of these technologies involved the use of several turbines, some of these devices can address more than one service at the time, therefore increasing the value stacking of these technologies.

Although they come with high capital costs, and are in their initial demonstration phase, these devices are a promising solution to stabilize the electricity grid and reach a high level of integration of variable renewable energy sources.

For more information on this report, please visit or for the full portfolio of Energy Storage research available from IDTechEx please visit   IDTechEx guides your strategic business decisions through its Research, Consultancy and Event products, helping you profit from emerging technologies. For more information on IDTechEx Research and Consultancy, contact or visit  


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BDC 317 : Jun 2024