There are three main ways that grid-scale energy storage resources (ESR's) can make money: energy price arbitrage, ancillary grid services, and resource adequacy.
How do I evaluate potential revenue streams from energy storage assets?
Evaluating potential revenue streams from flexible assets, such as energy storage systems, is not simple. Investors need to consider the various value pools available to a storage asset, including wholesale, grid services, and capacity markets, as well as the inherent volatility of the prices of each (see sidebar, “Glossary”).
While energy storage is already being deployed to support grids across major power markets, new McKinsey analysis suggests investors often underestimate the value of energy storage in their business cases.
What is the 'value stack' in energy storage?
Owners of batteries, including storage facilities that are co-located with solar or wind projects, derive revenue under multiple contracts and generate multiple layers of revenue or 'value stack.' Developers then seek financing based on anticipated cash flows from all or a portion of the components of this value stack.
What is a battery energy storage project?
A battery energy storage project is a system that serves a variety of purposes for utilities and other consumers of electricity, including backup power, frequency regulation, and balancing electricity supply with demand.
Should energy storage be undervalued?
The revenue potential of energy storage is often undervalued. Investors could adjust their evaluation approach to get a true estimate—improving profitability and supporting sustainability goals.
In many regions, energy storage projects may be able to sell “ancillary services” in addition to energy or capacity either to transmission owners or to regional grid operators. For example, Swinerton's Mira Loma, California, energy storage project.