Talk:Proterra (bus manufacturer)

Standard mention weight with and without batteries ?
because valuable parameters: weight is an important factor in calculating the rolling resistance where about

18.25% of he energy goes to. On a certain moment you're adding batteries to deliver the energy of moving the heavy additional battery itself. There is an optimum.--SvenAERTS (talk) 13:04, 20 March 2016 (UTC)


 * Some math: According to Proterra, the E2 battery offers an energy density of 160 W-hr/kg (September 19, 2017 press release) and the E2 battery, as installed on Catalyst vehicles, has a capacity of 440 kW-hr (per the published specifications). That implies the battery alone weighs $$\frac{440\times10^3 W\cdot hr}{160 \frac{W\cdot hr}{kg}}=2750 kg$$; 2750 kg. The curb weight of an E2-equipped 35-foot and 40-foot Catalyst are 30500 and 29900 lb, respectively, and so the "empty" (no battery) weight of the Catalyst chassis is 11050 and 10850 kg for the 35-foot and 40-foot models, respectively. From the published specifications, that means:


 * XR battery weight = 27350 - 24360 = 2990 lb, 11% of vehicle weight (35' Catalyst)
 * FC & XR+ battery weight = 28925 - 24360 = 4565 lb, 16% of vehicle weight (35')
 * FC+ & E2 battery weight = 6060 lb, 21% of vehicle weight (35')
 * E2+ battery weight = 31574 - 23920 = 7654 lb, 24% of vehicle weight (40')
 * E2 max battery weight = 33150 - 23920 = 9230 lb, 28% of vehicle weight (40')
 * Cheers, Mliu92 (talk) 16:15, 13 July 2018 (UTC)

"Current operations"
This section is vague and not cited and contains errors. One thing I found: purchases of buses and options for purchases doesn't make it a current operation, so I renamed it to include future operations. Buses can also be delivered but not in operation yet. I also found different numbers than the uncited ones (and some basic geographical errors). I'm going to try and update any in Washington State over the next day or so, but I consider the rest to be dubious unless cited (and the citation checked). Charlesmartin82 (talk) 22:44, 24 July 2018 (UTC)

Article on Edmonton's fleet of problematic Proterra buses
This article from CBC may be worth incorporating into the article. It includes a quote, "most of the city's 60 electric buses aren't fit to be on the roads" and indicates significant, long-term problems. --Yamla (talk) 17:02, 22 November 2023 (UTC)