Demanding CO2 and fuel economy regulations are continuing to pressure the automotive industry into considering innovative powertrain and vehicle-level solutions. Powertrain engineers continue to minimize engine internal friction and transmission parasitic losses with the aim of reducing overall vehicle fuel consumption. In the first part presented in 2017 the authors described the design of a flexible test stand allowing to test air conditioning systems as well as alternators. The first part focused on the collection of existing data as well as identification of potential areas for improvement. The second part of the series will focus exclusively on the operation of the alternator. Two main elements of the study will be discussed. The first part explores extensive tests performed to evaluate the main design aspects of the component. Different belt designs, routing, and tension levels were tested and compared. A resulting matrix allows to determine an optimized belt design and layout for a specific vehicle configuration. In the second part of the study the authors developed smart charging algorithms that allow for system charging while improving fuel consumption. The strategies were compared to the original vehicle level configuration and a developed model compared the total fuel consumption benefit. With optimized and smart charging algorithms the authors found up to approximately 2% fuel economy savings potential over a standard FTP75 test cycle. Results for all tests as well as comparison between different alternators will be presented and discussed in detail.