With the growth in demand for energy storage as the world adds more renewables, CSP thermal energy storage may well be poised to benefit too. One effect might be to place a market value on the thermal storage that can be included with CSP. USA based IHS has released a forecast predicting addition of 40 GW of energy storage globally by 2022. PV which has been racing ahead of CSP has started appearing to be a problem child. A number of markets internationally are mandating storage because they can’t deal with the intermittency that PV provides.
The small island nation of Puerto Rico has already hopped aboard with a requirement that new utility-scale renewables must now include a third of their capacity in storage. Even Germany and Japan are offering incentives for adding storage to to PV. The price of CSP with storage is steadily going down rapidly, from 21 cents a kilowatt-hour in 2010 to just 13 cents today – unsubsidised.
In this article CSP Today provides a view on battery vs molten salt for energy storage.