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has closed on a $35 million Series C funding round in its largest raise to date.

The San Francisco company, which has developed an electric vehicle charging network, has brought in a total of $60 million in venture capital since it was founded in 2010. Instead of selling electrons to EV owners, Volta sells advertising space and marketing analytics to media customers. The company also works with municipalities and industry groups to reduce emissions.

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led the company鈥檚 latest round, which also included participation from ,听, Orsted Venture, , and . Existing investors and also increased the size of their previous investments.

Volta plans to use its new capital toward market and site expansion, product development, and hiring, according to , president of Volta Charging. The startup currently has more than 40 employees, which is up 50 percent compared to last year. Its 2017 revenue was up three times compared to the year prior and 2018 is so far on target to be at least three times that of 2017, according to Wendel.

Volta is able to offer its EV chargers to drivers and real estate hosts at no costs by installing chargers in high-traffic locations in what it describes as 鈥渢op media markets鈥� and partnering with advertisers to sponsor the service.

Volta currently operates citywide EV charging networks in more than 50 municipalities in markets such as Chicago, Los Angeles, Austin, San Francisco Bay Area, San Diego, Phoenix, Portland, Hawaii and Seattle . The company plans to double its network footprint by year鈥檚 end by adding more stations and opening new markets. Volta said is increasingly receiving requests from real estate owners for its charging stations. Specifically, the company anticipates that it its network to markets such as Boston, Washington, D.C., Atlanta, and New York City.

Autotech Ventures Managing Director said that Volta鈥檚 business model is the most elegant of the EV charging network startups his firm has seen. And , partner at the Invenergy Future Fund, applauds the startup鈥檚 鈥渋nsight to bring the media industry to bear to create a mobility infrastructure solution.鈥�

, managing director of Activate Capital, added that Volta offers 鈥渁n opportunity to elegantly advance the intersection of two of our most important sectors鈥攅nergy and transportation.鈥�

鈥淏y leveraging sponsorship to underwrite free charging and infrastructure,鈥� Jacob said in a statement, 鈥淰olta has created a unique model to accelerate the future of mobility.鈥�