According to Proterra: Transit fleets need long life for their batteries and significant uptime. So we’ve designed our battery systems from the ground up to meet the transit and commercial vehicle segment demands.
Proterra batteries are purpose-built for commercial applications, proven on the road through 20+ million service miles in heavy-duty applications for mass transit. Proterra batteries are designed from the cell level up for commercial usage. Proterra batteries have industry-leading energy density for maximum range, a flexible design to fit a wide variety of vehicles, and a ruggedized commercial grade housing to withstand harsh environments. We’ve established a lifespan of 4,000 cycles for our battery systems; that’s charging and discharging every day for 12 years in a transit vehicle.
In addition, safety and reliability are at the heart of Proterra’s battery technology platform. Proterra batteries are manufactured with safety mechanisms built directly into the battery architecture and have undergone extensive testing to meet exacting safety standards. All battery products undergo rigorous testing to ensure they can withstand a full-service life under the toughest conditions, including extreme heat, cold, water submersion, vibration, and impact. Proterra battery systems incorporate Proterra’s patented technology, monitoring sensors throughout the battery pack, and passive propagation resistance, isolating individual battery cells in the rare case of a thermal event to prevent wider spread.