Power Supply for Remote and Unattended Electrical Loads

Conventional methods of providing power require expensive pole-drop utility connections, high replacement cost of battery-backup systems, other regular maintenance, or inordinate size and substandard reliability. The proposed device uses an optimized combination of battery and solar power, which when coupled with sophisticated power electronics circuits, is capable of supplying 50 W-hr/day of electricity, continuously, unattended for at least four years. This will improve substantially on conventional, non-electronic, high-maintenance solar-battery systems. It will also be far less expensive and more energetic that devices based on double-layer capacitors.