The Independently Powered Electric Multiple-Unit (IPEMU) project is a battery-powered train that entered trial passenger service in Essex, in January 2015. The train ran between Harwich International Station and Manningtree Station for a period of five weeks. The prototype rail project was UK's first modern battery-powered train and was established to demonstrate the potential of a battery / electric hybrid EMU in passenger service.

The train was operated by Abellio Greater Anglia, with the project being a partnership between the infrastructure manager Network Rail, the Department for Transport, rolling stock manufacturer Bombardier, train operator Abellio Greater Anglia and railway innovation body FutureRailway.

James Ambrose managed the project for Network Rail and explains the trials and the lessons learned.