Hybrid Power System
Hybrid Power Case Study
Microwave Repeater Site Mozambique, East Africa
This is the site of a microwave backbone, rural radio and external line plant in the northern province of Tete in Western Mozambique. Thirteen hybrid power systems (HPS), installed on mountain tops in rural Mozambique, power a series of microwave telecommunications sites. The HPS operates with no generator or utility grid connection, and powers microwave repeaters that provide initial and upgraded service to more than 175,000 square kilometers. Supplied by Alpha Energy and Argus Technologies, members of The Alpha Group, the system was designed with simplified maintenance and troubleshooting in mind considering the remote locations. The HPS48 Series PV arrays range in size from 660 to 4950W. The battery charging controllers provide remote access via an RS-232 serial port, allowing engineers to monitor system operating parameters such as PV current and battery voltage. The controllers also provide programmable alarm contacts to alert maintenance crews if battery voltage drops below critical levels. The system runs on a charge by day/discharge by
HPS48 Series Specifications System Voltage: 48VDC Maximum Customer Load: 645W (DC) Continuous PV Array: Sharp NE-165U1 (660 to 4950W) Battery Bank: Sealed, 200-2200Ah, 48VDC Temperature Range: -4 to 104째F System Maintenance: Once every 6 months (Check electrical connections, wiring, fasteners) Controller: Programmable, with alarm monitoring and remote access/control
night cycle; fully charged batteries can run for approximately six days, ensuring loads are powered during cloudy periods.
Alpha Energy United States Bellingham, Washington www.alpha.com Phoenix, Arizona
Tel: 360 647 2360 Fax: 360 671 4936 Tel: 602 997 1007 Fax: 623 249 7833
049-216-16-003 (11/09)