Improving Commercial Viability of Fast Charging by Providing Renewable Integration and Grid Services with Integrated Multiple DC Fast Chargers
Aggregating PEVs to efficiently balance the DC fast charging load demands with renewable energy over-generation.
Construction at the demonstration site, which consists of four direct current fast chargers and a second life battery installed in Monterey Park, CA, was completed in March 2020. Usage was low due in part to COVID-19 impacts on travel behavior, so the project team used data from other similar installations to conduct economic analyses of demand charge reduction, demand response participation, and renewable integration. A draft final report is currently under review. Greenlots leveraged project findings at other sites and participated in multiple CEC workshops to share project learnings.
The project enables day-ahead and real-time pricing for DC fast charging by developing an integrated hardware and software platform to engage drivers and customers, manage DC fast chargers, and control an on-site second life PEV battery storage device to limit peak demand. The site controller and network-based platform advances smart and efficient charging by managing four multi-port fast charging stations to minimize grid impact and lower operating costs, evaluates the suitability of DC fast charging to participate in demand response programs, and develops and evaluates control strategies to integrate more renewable generation on the California grid. The project produces real and simulated data from the demonstration site in Monterey Park, Ca, that supports DC fast charging service provider planning regarding use of managed charging and distributed energy resources. The technologies developed are being commercialized at other sites in California and nationally.
Integrated DC fast charging management with second-life PEV batteries offers lower operating costs and can increase operating revenues by more than $4,000 per year for each DC fast charger.
Using second-life lithium batteries from PEVs as energy storage extends product lifetime and provides another marketable use for these batteries as an alternative to disposal or recycling.
Intelligent software control will enable the availability of flexible capacity to the grid, allowing additional renewable integration and reduced stress on grid during peak hours with demand response capacity.
Key Project Members
Maxgen Energy Services
Zeco Systems, Inc. dba Greenlots