Battery Energy Storage Market Size, Share & COVID-19 Impact Analysis, By Battery Type (Lithium-Ion Battery, Lead Acid Battery, Flow Battery, and Others), By Connectivity (Off-Grid and On-Grid), By Application (Residential, Non-Residential, Utility, and Others), By Ownership (Customer-Owned, Third-Party Owned, and Utility-Owned), and Regional Forecast, 2021-2028