DOE Global Energy Storage Database
Office of Electricity Delivery & Energy Reliability
SDG&E Century Park DESS - Greensmith
As part of an EPRI collaborative research and development (R&D) project to evaluate the performance and reliability of a variety of grid-connected Li-ion battery technologies, San Diego Gas & Electric (SDG&E) installed a 50 kW / 82 kWh Greensmith lithium-iron-phosphate distributed energy storage system (DESS) at the utility’s test facility. For this overarching collaborative demonstration, EPRI’s Energy Storage Program (P94) and Distributed Renewables Program (P174) are working in partnership with select utility members to investigate PV-battery integration capabilities. Serving as a “host” utility to EPRI’s supplemental demonstration initiative, SDG&E installed a Greensmith DESS in a grid-connected configuration in June 2011 and has been conducting operating evaluations of the unit over the past 6 months.
Testing and operating evaluation conducted by SDG&E encompasses exercising the DESS’s various modes of operation, which include:
- Constant power charge/discharge schedule;
- Peak shaving; and
- PV smoothing.
Jun 01, 2011
8330 Century Park Ct,
San Diego , California 92123
San Diego Gas and Electric
OWNERSHIP & VALUE CHAIN PARTNERS
Electric Power Research Institute (EPRI)
COST & PERFORMANCE
• System roundtrip AC efficiency: ~85% • PCS efficiency: ~95%
SDG&E has been testing the battery unit since June and recently completed its 6-month evaluation period. It has successfully tested and demonstrated nearly all of the battery’s modes, with the exception of determining whether the unit can receive commands remotely through a Modbus connection. Note: Because no working PV system existed on-site, testing of the DESS’s PV ramp rate control mode of operation was conducted using virtual PV system data.
2012-06-25 09:38 PM UTC
2016-05-23 09:50 PM UTC