EV Fleet Telemetry

The Challenge

A metropolitan transit authority operating over 500 electric buses was struggling with unexpected battery failures causing service disruptions. Their existing diagnostic process was manual — technicians had to physically inspect buses in the depot, making it impossible to catch degradation issues before they led to on-route breakdowns. With each unplanned downtime event costing thousands in service delays and emergency maintenance, they needed a proactive approach.

The Solution

QSense devices were installed on each bus, connecting directly to the vehicle BMS via CAN bus. The devices stream pack-level and cell-level telemetry over 4G/LTE to QuantaCloud in real time — even while buses are in service. QuantaCloud's fleet dashboard gives the maintenance team a live overview of every bus, with FlareWatch automatically flagging vehicles that need attention.

• QSense on every bus — CAN bus integration, 4G streaming
• Fleet-wide QuantaCloud dashboard with geospatial tracking
• FlareWatch alerts for SOH degradation and thermal events
• FlareBot analytics for root cause identification

The Results

Within six months, unplanned downtime events dropped by 40%. The maintenance team shifted from reactive repairs to scheduled preventive maintenance, with FlareWatch catching degradation trends weeks in advance. The fleet's overall battery life expectancy improved as a result of better charge management informed by FlareBot's analytics.

"We used to find out about battery issues when a bus couldn't complete its route. Now we know days in advance. QuantaFlare completely changed how we manage our fleet."