Solar Power Plus Lithium Ion Storage Cost Breakdown

Solar Power Plus Lithium Ion Storage Cost Breakdown
AP Photo/Geert Vanden Wijngaert

Building on its work documenting the costs of solar PV, the U.S. Department of Energy's (DOE) National Renewable Energy Lab (NREL) has now put together a bottom-up price of utility-scale energy storage, including that attached to solar plants. And while NREL notes that utility-scale solar+storage is really in its infancy with only one project in the DOE's national database – the 13 MW solar plus 52 megawatt-hour storage system in Kauai, Hawaii – we at pv magazine USA are seeing more and more of these systems entering into competitive solicitations and signing power contracts.

2018 U.S. Utility-Scale Photovoltaics Plus-Energy Storage System Costs Benchmark (pdf) breaks down various ways that solar+storage is applied: co-located versus separate, as well co-located that is DC-coupled versus AC-coupled, and various hours of duration ranging from 4 to 0.5 hours.

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