Depot charging infrastructure for 70 electric buses

The challenge

Strætó was expanding its electric bus fleet and needed a depot that could charge a large fleet every night. This was not about installing chargers but about megawatts of power, new on-site high-voltage distribution and a charging schedule that kept the buses on time. As a publicly owned company, Strætó needed the solution clearly defined before it could be tendered.

What we did

• Analysed charging demand from the bus schedule: arrival times, dwell times and energy needs
• Designed charging infrastructure for 70 buses with 3.5 MW of total power
• Defined on-site high-voltage distribution and the placement of three transformer stations to minimise losses
• Allowed for fleet expansion in the design

Outcome

• Charging infrastructure for 70 buses, 3.5 MW, designed from real operations rather than theoretical peak power
• High-voltage distribution and three transformer stations on site
• A ready basis for tendering the charging infrastructure

Lesson

The biggest savings are made at the design stage, before construction starts.

Related services

• Fleet charging infrastructure
• Simulation and design