In addition to PSH and battery storage, CSP can provide large-scale energy storage, but the way CSP thermal storage characteristics differ from those of PSH and stationary batteries prevents direct comparison. Nonetheless, most CSP plants deployed over the outlook period are expected to include thermal storage, though at a comparatively small scale with only almost 6 GW to be commissioned by 2023. Thermal storage capacity of CSP is projected to reach 34 GWh.

To take advantage of economies of scale, CSP projects are expected to become larger – over 100 MW on average.

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