Presentation to focus on future of renewable transit solutions

GREENVILLE, S.C., October 11, 2012 – Proterra, the leading provider of zero-emission commercial transit solutions and maker of the world's first battery-electric fast-charge transit bus, will discuss strategies for supporting growing ridership through the use of alternative fuels and technologies.

RETECH, The Renewable Energy Technology Conference will showcase the latest renewable energy applications and technologies and bring together industry leaders from all 50 states and 60 countries with policy makers and government officials. The conference will take place October 17-19 at the OMNI Shoreham in Washington, D.C.

Proterra's Chief Business Development Officer and General Counsel, Marc Gottschalk, will be part of a panel discussion at 3:45 p.m. on October 18. The panel will be focused on alternative fuels, clean transit acquisition strategies and the development of more sustainable transit programs. Through his past role as an environmental lawyer and in his present capacity at Proterra, Gottschalk is one of a small inner circle in Silicon Valley who pioneered the U.S. cleantech sector and helped shape it into a new driver for global innovation and economic growth.

As the only United States-based manufacturer of zero-emissions battery-electric buses, Proterra has led the charge in the industry to not only introduce clean technology, but also to create a sustainable operating model to make this technology a more viable option to transit agencies across the country. In addition to adding zero emissions to the environment, offering the best fuel economy of any passenger bus and having the market's lowest carbon footprint, Proterra's battery-electric EcoRide™ is the quietest bus on the road, reducing noise pollution and creating a more positive urban environment.

The company's buses have been specified in several recent Clean Fuel grant awards, and interest among transit agencies has continued to grow.

"Proterra's EcoRide battery-electric buses have both the smallest carbon footprint on the market and the lowest total cost of ownership," said Gottschalk. "Many transit agencies know that EV is the future of transit, but with this combination of sustainability and cost-effectiveness, there's no need to wait and see: the future is now."

For more information about RETECH, please visit http://www.retech2012.com/

About Proterra

With manufacturing in Greenville, S.C., Proterra is a leading designer and manufacturer of heavy-duty electric drive systems, energy storage systems, vehicle control systems, transit buses and fast-charging stations. Proterra's systems are scalable to commercial buses of all sizes. Its ground-up designs have led to the EcoRide, the world's first full-size, 10-minute charge transit bus. While a young company, Proterra combines the best of start-up mentality and aggressiveness, combined with a highly talented and tenured team and the stability of a solid core of financial support from influential investors, such as Kleiner Perkins Caufield & Byers, a leading Silicon Valley-based venture capital private equity firm; General Motors Ventures; Mitsui & Co. Global Investment, Inc., one of the largest investment firms in Japan; Vision Ridge Partners LLC, a Boston-based business that invests in transformative growth companies focused on sustainability; and 88 Green Ventures, an investment and asset management firm that assists emerging green companies. For more information on Proterra and its technology, please visit: www.proterra.com.