 General Motors is sponsoring the Pecan Street demonstration project at the Mueller neighborhood in Austin , Texas . The project objective is to learn the charging patterns of plug @-@ in electric car owners , and to study how a residential fleet of electric vehicles might strain the electric grid if all owners try to charge them at the same , which is what the preliminary monitoring found when the plug @-@ in cars return home in the evening . As of June 2013 , the community has nearly 60 Chevrolet Volt owners alone thanks to GM 's commitment to match the federal government 's US $ 7 @,@ 500 rebate incentive , which halves the purchase price of the Volt . 
