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The key is to store energy produced when renewable generation capacity is high, so we can use it later when we need it.
Intermittency — a swear word! If only renewable energy sources like solar and wind could eliminate intermittency, then most of the world could reject a dependency on fossil fuels. Since our grid of the future relies on a larger proportion of wind and solar, it requires more storage capacity to overcome intermittency. We need to complement renewable energy with all kinds of renewable storage.
Energy storage is most useful when it is predictable, convenient, and dense, packing lots of power into a small space. Batteries play an integral role in maintaining renewable energy grid stability. Typically, renewables feed batteries that charge at night when demand is low and wind power is available. They discharge back to the grid as wind tapers, before solar begins ramping up. Then they charge throughout the sunny midday and discharge again as solar generation quickly falls off.
Renewable energy storage batteries are applied in alternative electricity generating systems like solar photovoltaic, wind, or water power systems, which allow energy to be stored when available and released to the grid when needed.
Shirley Meng, a materials scientist and engineer at the University of Chicago, told the New Yorker that the world needs “a whole suite of storage methods.” Not all methods will find a niche, but, she said, “I think we are way, way underinvested. Because we are really imagining trying to rebuild the entire grid system.”
Large-scale renewable energy storage has grown rapidly, with an increasing global demand for more energy from sources that reduce the planet’s contribution to greenhouse gas emissions.
Generation Integrated Energy Storage system (GIES) and non-GIES are popular topics of discussion these days.
There are 3 key parameters associated with both GIES and non-GIES:
Data indicate that the economic and financial performance for GIES and non-GIES are comparable. As such, when considering energy policy, there seems to be a need for enhanced planning mechanisms for co-locating low-carbon power generation with energy storage systems. Governments need to examine the type and amount of optimal incentives for low-carbon power generation and not forestall the need for storage. This need has resulted in technology under current exploration in the areas of thermal, mechanical, electrical, chemical, and hybrid storage.
It’s partly because storage strengthens the whole grid that it has found broad political support in the US.
The Better Energy Storage Technology (BEST) Act – H.R.2986 / S.1602 provides direction to energy storage research, development, and demonstration efforts at the US Department of Energy (DOE). BEST in overview offers the following. It:
The primary objective of the Duration Addition to electricitY Storage (DAYS) program is the development of long-duration electricity storage (LDES) systems that deliver electricity at a levelized cost of storage (LCOS) of 5 cents/kWh-cycle across the full range of storage durations (10 to approximately 100 hours). This requirement results in a target lifetime cost that decreases with increasing storage duration. The DAYS program includes two technical categories:
The Energy Act of 2020 revisited policy across the Department of Energy’s applied energy and fusion R&D programs, including by recommending funding increases and expanding efforts aimed at reducing carbon emissions. A number of congressional Democrats framed the act as a prelude to more aggressive steps. House Science Committee Chair Eddie Bernice Johnson (D-TX) called it a “down payment,” while Senator Chuck Schumer (D-NY), welcomed it as a climate policy win in a “difficult political environment.” He argued, though, that the legislation was inadequate against the threats of climate change.
Fossil fuels don’t need storage — they’re a prehistoric energy repository. Their energy is unlocked by burning, and the source seemed endless. But we’ve learned that fossil fuels create an existential crisis that has opened up the field of renewable energy.
So many options are becoming evident in the need to complement renewable energy with renewable energy storage. Could shared energy storage work in residential communities, for example? A study has determined that cost savings and energy storage utilization improvements up to 13.82% and 38.98%, respectively, exist when using shared energy storage instead of individual energy storage.
As in many things in life, a mélange of renewable energy storage systems options will be the best bet to make renewable energy adoption pervasive.
Carolyn Fortuna (they, them), Ph.D., is a writer, researcher, and educator with a lifelong dedication to ecojustice. Carolyn has won awards from the Anti-Defamation League, The International Literacy Association, and The Leavy Foundation. Carolyn is a small-time investor in Tesla. Please follow Carolyn on Twitter and Facebook.
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