Demonstrating Code-compliant Energy Storage Systems and Their Capabilities for Grid Harmonization
Evaluates the effectiveness of energy storage in zero net energy ready homes in terms of managing customer costs, providing grid harmonization and reducing grid carbon when applied as per Title 24 and when applied in the mode that is standard for
Electric Power Research Institute, Inc.
Recipient
CA
Recipient Location
13th
Senate District
24th
Assembly District
$318,120
Amount Spent
Active
Project Status
Project Update
The project team has identified the project sites along with participating builders. Contractual and legal terms were completed to enable data collection from customers. The team has completed evaluations of various methods to control and aggregate energy storage systems behind the meter. In addition, the team has been working with various vendors and evaluating the capability and capacity of their residential energy storage systems to determine which will be installed. As of April 2023, the project team has deployed four residential lithium-ion batteries in the northern climate zone and is in negotiations with several homeowners in the northern, central valley, and coastal climate zones.
The Issue
Recent updates to the Title 24 building code require solar PV on all new residential construction. As a result of more frequent grid outages from power safety power shutoffs (PSPS) and wildfire events, customers are expected to be more interested in adding energy storage to their homes for resilience. However, homeowners do not fully understand the value that they can achieve by having solar plus storage in the home.
Project Innovation
This project will install and connect energy storage units to existing solar panels at a minimum of 15 new construction single-family homes in three different California climate zones. The recipient will test and evaluate the control and operation of the systems to capture the best operational practices of the systems for the residents and the grid. The recipient will also provide insight into any future changes to Title 24 building code to help realize these values.
Project Goals
Project Benefits
The project will help overcome barriers to implementing residential storage by providing recommendations derived from field demonstrations. The project will also help to enhance Title 24 building code to better suit California's plans for decarbonizing the grid through more and better use of renewable generation. Potential new homes built in alignment with a better developed Title 24 building code favoring controllable energy storage could provide greater cost savings to homeowners and greater grid stability. This project will assess the operation of commercially available residential battery storage systems and develop new use cases by exploring tariff structures, independent control strategies (such as helping to optimize residential energy use, particularly during the evening ramp), and cost considerations that provide maximum benefits to both the customer and the grid.
Affordability
Connecting energy storage systems with mandated solar energy generation systems in new residential construction can result in reducing customer demand charges by appropriately controlling the generation and storage for the customers' loads particularly during periods of peak rates.
Reliability
Controlling solar-plus-storage systems in new residential construction can result in maximizing solar energy generation during high generation, low demand hours that can reduce reliance on power plants needing to ramp up production to meet demand and relieve pressure on the stressed grid infrastructure.
Energy Security
In October 2019, public safety power shutoff events left nearly two million Californian utility customers without electricity during two separate weekends. Customers with that only had solar PV were often unable to take advantage of renewable power. Adding energy storage and properly controlling the combination should ensure critical loads stay active during these types of events.
Key Project Members
Herb Yaptinchay
Evan Giarta
Subrecipients
TRC Engineers, Inc.
Abstractal LLC
Match Partners
Electric Power Research Institute, Inc.
TRC Engineers, Inc.
