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Emergency power supply enabling solar PV integration with battery storage and wireless interface.
Aratrika Ghosh1, Don Gamage1, Abhisek Ukil1
1Electrical, Computer, and Software Engineering, The University of Auckland, Auckland, New Zealand.
Journal of the Royal Society of New Zealand
|May 8, 2025
Summary
This study introduces an emergency power supply integrating solar power and battery storage with wireless charging. The system provides reliable power for appliances and electric vehicles in all weather conditions.
Area of Science:
- Renewable Energy Systems
- Power Electronics
- Wireless Power Transfer
Background:
- Emergency power supplies (EPS) often lack flexibility and ease of setup.
- Integrating solar photovoltaic (PV) and battery energy storage systems (BESS) offers a sustainable power solution.
- Wireless power transfer (WPT) presents opportunities for convenient charging applications.
Purpose of the Study:
- To investigate an emergency power supply system integrating solar PV, BESS, and a wireless interface.
- To offer a flexible, easy-to-setup solution for household appliances and wireless electric vehicle (EV) charging.
- To ensure continuous power availability across diverse weather conditions.
Main Methods:
- Mathematical modeling of the solar PV, BESS, and load interface.
- Utilizing inductive power transfer (IPT) as the wireless power transfer (WPT) method.
- Simulation and scaled-down experimental prototype development.
Main Results:
- Demonstrated wireless power transfer capability with PV and BESS integration.
- Achieved easy installation by aligning primary charging coil with existing wireless charging pads.
- Maintained a constant load voltage of 48V despite variations in solar irradiance (20-100%) and load characteristics (20-50%).
- Achieved a wireless power transfer efficiency of approximately 97%.
Conclusions:
- The proposed system offers a robust and adaptable emergency power supply solution.
- The integration of solar PV, BESS, and wireless charging enhances power reliability for various applications.
- The system proves effective for household appliances and wireless EV charging, even in adverse weather.
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