Category: Intra-day electricity storage
Malta Iberia Pumped Heat Electricity Storage S.L.U. (ES)
Alfa Laval Corporate AB (SE)
Siemens Gas and Power GmbH & Co. KG (DE)
The Sun2Store project develops, implements and operates an innovative pumped heat electricity storage system of 100 MWe net AC discharge power with 10 hours capacity. The storage system stores on a daily basis solar PV electricity during solar surplus hours and feeds this stored electricity back to the grid as required for covering the residual load curve to avoid renewable energy curtailment.
The storage innovation consists in combining novel heat pump technology with molten salt thermal storage, well proven in Spanish concentrating solar power plants, and thus making this long duration utility scale storage technology competitively applicable for solar PV and wind power generators. Beside its cost advantage compared to other existing technologies, such as battery storage, the benefits of the pumped heat electricity storage for the grid include the ability to provide dispatchable reserve power with rotating turbine equipment, fast ramping, reactive power and synchronous inertia.
The storage solution would be the first of its kind in Europe.