There are a number of factors that determine a market's need for storage, as detailed in Lux Research’s recent State of the Market Report "Grid Storage under the Microscope: Using Local Knowledge to Forecast Global Demand." In solar, don't simply look towards high volumes of installations – rather, storage is necessary to balance intermittency in markets with a high penetration level of solar in their overall electricity mix. Lux Research finds that emerging markets like Brazil, Chile and South Africa remain below 2% solar penetration through 2017, indicating that any storage adoption in those markets would come as a result of poor grid quality or generous incentives. A historically strong installation market pushes Germany to 15% penetration in 2017, indicating a much more pressing need for storage.