In recent years the electric car market has exploded across the world with one of the key components being the battery. As battery importance increases, Battery Management System (BMS) devices are evolving to make the battery work more effectively. The ability to use existing test equipment to test BMS devices in production will enable faster time to market. This presentation will discuss techniques for using of the ETS-88 tester to test BMS devices, with a focus on a low cost ETS-88 configuration that requires no external circuit, has floating resource flexibility and a highly accurate QMS.