1. Multi-input power converters -- circuit topology development, power flow control
2. Grid-tied renewable energy power generation system -- solar energy and photovoltaic properties, wind turbine characteristics, grid-tied bi-directional inverter
3. Power converter control strategies -- SPWM control, phase-shift control, sigma-delta control, predictive control
4. Battery energy management -- characteristics and models for various types of rechargeable batteries, chargers, state-of-charge detection