Presentation Description: Utility-scale wind and—in particular—solar projects are increasingly being paired with battery storage in “hybrid” configurations as a way to enhance their wholesale market value and provide critical grid services. But in these early days of hybrid development, there is still significant variation in how the battery portion of these projects is configured (e.g., AC- versus DC-coupled, battery capacity, duration, etc.), the intended “use cases” for the battery (e.g., providing ancillary services, energy price arbitrage, firming and shaping renewable output, etc.), and how the battery is treated within the PPA (e.g., compensation mechanisms, dispatch control, operating constraints, etc.).
Berkeley Lab has amassed a large collection of PPAs for hybrid wind and—in particular—solar plants. In many cases, these PPAs reveal pricing data; and in some cases the pricing for the battery portion is broken out, enabling us to calculate the incremental “storage adder” from including a battery. But even when pricing is redacted, these PPAs still often contain a wealth of other information on project configuration, intended use case, and other contractual terms, including operational parameters and constraints. Not surprisingly, the “storage adder” varies directly with some of these other variables.
This talk will present hard data and analysis from a review of LBNL’s hybrid PPA database, in order to lift the curtain and provide attendees with insights on how the storage market leaders are structuring their hybrid plants, both physically and contractually.
Upon completion, participants will be able to describe how hybrid wind and—in particular—solar projects are being configured, both physically and contractually within PPAs.
Upon completion, participants will be able to describe how hybrid projects will be operated (in terms of dispatch, cycling, depth of discharge, etc.) under the constraints imposed by PPA terms and conditions.
Upon completion, participants will be able to describe how much it costs to add a battery to a wind or solar project, and how that "PPA price storage adder" can vary based on differing project configurations as well as PPA terms and conditions.