EV charging system maker Ecotality has filed for Chapter 11 bankruptcy protection from its creditors, saying that it wants to sell its assets in an auction. Last month the company said that it might be forced to sell or file for bankruptcy after the U.S. government suspended payments as part of the Department of Energy EV Project. Ecotality, based in San Francisco, makes charging and power-storage systems for electric vehicles under the Blink and Minit Charger. It also makes charging stations for Nissan’s Leaf brands, and provides testing services for government agencies, auto makers and utilities. The company now says that it would prefer to sell its assets through a court approved bankruptcy auction.