Enel Green Power’s (EGP) Ngonye solar plant, which is located in the Lusaka South Multi Facility Economic Zone, uses tracking systems that feature solar PV (photovoltaic) panels to track the movement of the sun through the day, capturing sunlight and converting the energy into electricity.

The only site in sub-Saharan Africa to use tracking technology from Convert Italia, the Ngonye plant was compelled to use it when the designated land from the solar farm was not large enough to accommodate the planned infrastructure.
The tracking of the sun is achieved via Global Positioning Satellite (GPS) connected to an Electronic Tracker Control Board (ETCB). The integrated GPS device acquires both date and time. This information, along with astronomical clock algorithms, is sufficient to identify and properly track the sun’s position.

Each single axis tracker automatically tracks the sun’s East – West movement during the day via the ETCB. A single control board controls a maximum of 10 structures with a photovoltaic energy capacity of about 97,5 kWp. The primary benefit of the tracking system is that it improves plant efficiency by increasing energy output as it lengthens the plants peak generation period above similar sized fixed axis plants.

Commissioned in 2019, the Ngonye plant is a joint venture between EGP and the Industrial Development Corporation (IDC). The operation has the capacity to supply 34 MW of energy to ZESCO, the national electricity utility, under an existing 25-year Power Purchase Agreement (PPA).

EGP Zambia’s Kachinga-Wankunda Phiri says the plant is one of only two large scale, grid-connected renewable energy facilities operating in the country. “To date, there has only been one procurement round in Zambia leading to projects achieving commercial operations – The Scaling Solar Program – which was managed by the IDC in partnership with the International Finance Corporation (IFC),” he says.

Due to Zambia’s lack of a long-term procurement programme for renewables, EGP Zambia is focused on growing its commercial and industrial pipeline. “Our goal is to provide tailormade solutions to commercial and industrial customers that will allow them to reduce their carbon footprints, achieve their sustainability goals and facilitate business continuity by ensuring a stable energy supply,” concludes Phiri.

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