Solar power and energy storage combo boosts reliability

Rows of solar panels are separated by a walkable space between them

New research shows that when a power system combines energy storage and solar power generation, the end result is greater than the sum of its parts in terms of its ability to handle peak energy demand.

That’s encouraging news for renewable energy.

“Electric utilities are tasked with ensuring they can reliably meet consumer energy demands,” says study coauthor Joseph DeCarolis, a professor of civil, construction, and environmental engineering at North Carolina State University. “Quantifying the reliability benefits of different generation sources informs where investments will be made.”

A power source’s reliability benefit is how much power a given source can be relied on to produce during times of peak demand.

“Our work here suggests that solar power can offer greater benefits to reliability than sustainable energy skeptics suggest,” says corresponding author Jeremiah Johnson, an associate professor of civil, construction, and environmental engineering.

“Investing in both solar power and energy storage systems can unlock reliability value that neither technology would provide on its own.”

For the study, which appears in the journal Renewable Energy, researchers looked at the power system in North and South Carolina to assess issues related to renewable energy and reliability.

With data on power demand and the mix of power generation sources, the researchers built computational models to assess how much power a system could expect from different sources during periods of peak energy demand.

The models allowed researchers to vary the size of solar farms in the system and the amount of energy storage in the system to determine how those changes might affect the overall reliability benefits during periods of peak demand.

“When a system combines solar and energy storage, that combination can be relied upon to provide up to 40% more power during peak demand than if you just added the output from each source,” Johnson says.

“Basically, we found that solar power generation reduces the peak load that would need to be met with stored energy, and reduces the duration of that peak demand. In effect, there is a symbiotic relationship between these technologies.”

Additional coauthors are from NC State and North Carolina Central. The North Carolina Policy Collaboratory funded the work.

Source: NC State

About The Author

Matt Shipman-NC State

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This article originally appeared on Futurity

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