Stability in Intermittency: The Role of Energy Storage in Renewables

Unlike conventional power plants, which generate a steady and controllable flow of electricity, renewables rely on natural elements that are subject to daily and seasonal fluctuations.

Intermittency refers to the variable nature of renewable energy generation, which can result in supply imbalances and grid instability. For instance, wind power production heavily relies on wind intensity, which can vary throughout the day. Solar power faces similar challenges with respect to weather conditions and daylight availability.

To ensure a smooth transition towards a renewable energy future, we need to address the issue of intermittency effectively. This is where energy storage systems play a significant role.

The Importance of Energy Storage

Energy storage serves as a crucial link between intermittent renewable energy sources and reliable power supply. It allows capturing excess energy generated during periods of high production and storing it for later use when production is low.

By storing energy, storage systems help balance supply and demand, mitigating the impact of intermittent renewable generation on the grid. Whether it’s a windless night or a cloudy day, energy storage allows us to tap into stored energy reserves, providing a stable and consistent power supply to consumers.

Let’s delve into some key benefits and features of energy storage systems:

Smoothing Out Supply Variability

Energy storage offers a solution to the variability and unpredictability of renewable energy supply. It acts as a buffer, absorbing excess energy during peak production periods and releasing it during low production periods. This effectively smooths out supply variations, enhancing grid stability and reliability.

Grid Independence and Resilience

Energy storage allows for greater grid independence and resilience. By reducing the dependence on immediate renewable energy generation, storage systems offer flexibility and reliability to withstand fluctuations in solar and wind power output. This enhances overall grid resilience, reducing the risk of blackouts and ensuring a constant power supply to critical infrastructure.

Peak Demand Management

Energy demand typically experiences peaks during certain periods of the day when the usage is highest. Energy storage plays a crucial role in managing these peak demand periods. By discharging stored energy when demand surges, storage systems relieve stress on the grid and help avoid the need for costly additional power infrastructure.

Supporting Renewable Integration

Energy storage systems simplify the integration of renewable energy technologies into the broader energy infrastructure. By addressing intermittency, storage systems enable a more efficient utilization of renewables, promoting their widespread adoption. This, in turn, drives further investment in renewable energy sources, creating a positive feedback loop for a greener energy future.

Statistics on Energy Storage

Let’s take a look at some industry statistics highlighting the growing importance of energy storage in supporting renewable energy:

  • The global energy storage market is expected to grow at a compound annual growth rate (CAGR) of 31% between 2021 and 202 [1]
  • The United States had the largest installed energy storage capacity in 2020, accounting for approximately 41% of the global market share. [2]
  • In 2020, lithium-ion batteries dominated the energy storage market, representing around 89% of all deployed systems. [2]
  • By 2030, the European grid-connected energy storage market is set to reach a capacity of 340 GW. [3]

These statistics demonstrate the remarkable growth and potential of energy storage technologies in supporting renewable energy integration.


The stability of intermittent renewable energy sources is a crucial aspect to address for a smooth and successful transition to a low-carbon energy future. Energy storage systems provide the missing link, offering a reliable and efficient way to capture, store, and release renewable energy when needed. By managing the variability and unpredictability of renewables, energy storage enhances grid stability, promotes renewable integration, and supports peak demand management. The continuous development and adoption of energy storage technologies are key to unlocking the full potential of renewables and creating a sustainable energy landscape for future generations.

As we strive to mitigate climate change and reduce our carbon footprint, energy storage represents a significant tool in our quest for a cleaner and greener energy system.


  1. [1] – Global Energy Storage Market Report
  2. [2] – U.S. Energy Storage Monitor
  3. [3] – Europe’s Renewable Energy Challenge