New York Deploys 268 kW School Bus Depot
- EVs Fleet & Depot Charging Infrastructure & Grid Connection News
Marin Holt
- 0
- 6 minutes read
- 14 electric school bus chargers with 268 kW nameplate capacity operate on 80 kW grid connection
- Automated load management achieves 3.35x capacity ratio, avoiding six-figure utility upgrade
- Project won Con Edison Most Innovative Interconnection Award at 2024 E-Mobility Awards
- New York requires zero-emission bus purchases starting 2027; NYC full electric fleet by September 2035
- EPA Clean School Bus Program funded 8,500+ electric buses across 1,200 districts as of July 2025
New York City School Bus Umbrella Services (NYCSBUS) and The Mobility House commissioned a 14-charger, 268-kilowatt-nameplate depot charging system at the Zerega Avenue facility in the Bronx using an 80-kilowatt utility connection, avoiding an estimated six-figure grid upgrade by deploying automated load management software. The project received the Consolidated Edison Most Innovative Interconnection Award at the 2024 Con Edison E-Mobility Awards and serves 14 of the 25 EPA Clean School Bus Program-funded electric buses the district deployed.
How Automated Load Management Replaced a Grid Upgrade
Without software-managed charging, the Zerega depot’s 80 kW grid connection could support only 4 simultaneous bus chargers. The Mobility House’s ChargePilot Automated Load Management function dynamically distributes available power across all 14 active chargers, ensuring aggregate draw never exceeds 80 kW regardless of simultaneous plug-ins. A proprietary Charging Simulation confirmed all 14 bus routes complete daily charging within the 80 kW constraint. The result is 268 kW of nameplate charging capacity on an 80 kW supply, a 3.35x utilization ratio that eliminates transformer and service upgrade costs. The New York School Bus Incentive Programme provides at least $25,000 per bus for hardware, electrical site upgrades, and installation, funded through the $4.2 billion Clean Water, Clean Air, and Green Jobs Environmental Bond Act. New York State law requires all new school bus purchases to be zero-emission starting 2027, and NYC must have a fully electric fleet by September 1, 2035.
Critical Analysis
The Zerega depot’s 3.35:1 nameplate-to-service ratio (268 kW charger capacity on an 80 kW Con Edison connection) requires ChargePilot to sequence charger activation, creating stepped load events that the distribution transformer must absorb within ANSI C84.1-2020 Range A plus or minus 5% voltage limits at 480V. The Zerega Avenue ALM deployment eliminates the Con Edison distribution upgrade that would otherwise have been required, directly reducing feeder stress.
5-Year Projection
By 2031, operational data from facilities like this will become the standard requirement for securing interconnection agreements, as ISOs prioritize proven ChargePilot ALM Software (The Mobility House) profiles.
Critical Perspective
The article highlights a 268 kW charging system operating on an 80 kW grid connection. While this project showcases clever load management, it omits the specific transformer and feeder capacity details that would allow for a true comparison to a standard grid upgrade. The Hoover Dam, a massive infrastructure project, was built with a direct and substantial power generation capacity to meet its intended load. Does this automated load management truly defer grid upgrades or merely shift the stress to a different part of the distribution network?
Why It Matters
Distribution grid capacity is the primary cost constraint on depot electrification. A NYSERDA study found transformer and service upgrades consume 30 to 60 percent of electric bus project budgets at unprepared sites. The Zerega result demonstrates automated load management can defer or eliminate those costs for depots below 100 buses. A separate V2G pilot in North White Plains, involving Con Edison and National Express, showed bus batteries can return energy to the grid during summer peak hours, generating revenue when vehicles are inactive. The EPA Clean School Bus Program had funded more than 8,500 electric buses across 1,200 school districts educating 16 million students as of July 2025.
