Pittsburg USD Electric School Bus Project

Real Time Renewables and Grid Optimization

Decarbonize Student Transportation

Electric School Buses as Grid Assets

Olivine deployed a low-cost, configurable electric fleet (E-Fleet) charge management system at Pittsburg Unified School District (PUSD) that is capable of optimizing towards specific goals defined by the fleet manager, including: providing bill management, reducing carbon emissions, maximizing charging from on-site renewable generation, and providing grid support services. In addition to scheduling charging around time of use rates and minimizing demand charges, Olivine’s system monitors on-site renewable generation and controls charging in real time to implement coincident renewable self-consumption and enables the E-Fleet to provide grid services through participation in the Pacific Gas and Electric Company’s (PG&E) Excess Supply Pilot (XSP). This project was funded by PG&E as part of California’s Senate Bill 350 (Clean Energy and Pollution Reduction Act) Transportation Electrification Priority Review Projects. Olivine partnered with PUSD and Liberty PlugIns on this pilot project.

Innovations in School Bus Electrification

Optimize for Bill Management

Olivine’s E-Fleet charge management system shifts charging from the high-cost time-of-use (TOU) periods to lower-cost TOU periods to save the school district money on their utility bill.


Olivine’s E-Fleet charge management system implements a round-robin charging approach to minimize demand or subscription charges on the school district’s utility bill. Round-robin charging is the act of charging buses in alternating 30-minute intervals in order to manage peak power as opposed to charging all of the buses at once and causing a spike in the demand.


Olivine’s E-Fleet charge management system combined with Olivine DER™ enabled PUSD’s E-Fleet to participate in PG&E’s Excess Supply Pilot (XSP), which Olivine administers. This innovative engagement of an electric school bus fleet in XSP allowed Olivine to gain insights on how medium and heavy-duty fleet vehicles can act as distributed energy resources during periods of high renewable penetration. Read More.


Olivine’s E-Fleet charge management system integrates the school district’s E-Fleet with their on-site renewables to demonstrate energy-self reliance and reduce greenhouse gas (GHG) emissions. The E-Fleet performs coincident renewable self-consumption (RSC), meaning the buses are scheduled to charge when the renewables export to the electrical grid.

Optimize for emissions reductions

PUSD’s electrification efforts are rooted in a desire to reduce pollution and greenhouse gas (GHG) emissions. Olivine’s E-Fleet charge management system pushes the envelope on transportation decarbonization beyond just electrification by executing innovative ways to reduce emissions such as performing coincident renewable self-consumption and participating in PG&E’s Excess Supply Pilot (XSP).

Total Avoided Co2 Emissions

Project Details


  • 4 Electric Buses
  • 9 Level 2 Chargers & a Cloud-connected Charge Controller
  • 160 kW of On-site Solar PV
  • 40 kW of On-site Vertical Axis Wind Turbines


  • Reduce the total cost of ownership (TCO) of electric buses for school districts by minimizing infrastructure and fuel costs
  • Demonstrate that medium and heavy-duty fleet vehicles can act as distributed energy resources during periods of high renewable penetration

“The school bus electrification project has been amazing! The data we are collecting with the help of Olivine can be used to replicate the project and show viability. Olivine is managing control of charging so we don’t have to worry about it. As an impacted community, every effort to reduce our carbon footprint will have a ripple effect that will be long felt. ” — Matt Belasco, Pittsburg USD Director, Maintenance, Operations and Transportation

“Pittsburg Unified School District purchased our first all-electric school buses with the plan of being a more green school district and hoping they could be integrated with our new solar and wind generation facility at our Site Support Services Center. We worked closely with Olivine’s development team, who built and implemented software to maximize our bus charging with our renewables production, optimizing for the best method to charge, and in doing so, saving the District significant funding. They listened to what we wanted, developed the product to do just what was needed, and did so in outstanding cooperation with our District and those involved in the project.” — Alan Glass, Former Pittsburg USD Special Projects Accountant / Energy Supervisor