Focus areas include batteries, fuel cells, motors, inverters, micro grid controllers, charging, energy storage systems, lifecycle solutions/services and integration of components for ePowertrain solutions across industries. Electrification+ Energy Solutions (E+ES): Caterpillar's Electrification+ Energy Solutions (E+ES) Division focuses on delivering advanced electrified power train, zero-emissions products/technologies, and the solutions and services associated with these technologies.