The Ndjolé hybrid solar power (1.440 panels) plant project is the first application of fuel save technology in Gabon. The plant’s photovoltaic panels are connected to three 100 kW inverters. The solar power generated is sent to the transformer station over a medium-voltage line, and then a further 500 m to the national grid, using 7 poles put up by Ausar Energy. Communication between the photovoltaic controller and the four generator-set controllers takes place directly from the thermal power plant. Communication between the two plants to ensure continuous supply is through a 3.5 km optical fibre installed between the solar power plant and the Société d’Electricité et d’Eau du Gabon thermal power plant.
The lifespan of the main photovoltaic equipment (the panels and installation structures, in particular) is 25 years. The solar power is constant over the lifetime of the power plants during this period, namely 2.8 MWp. After this period, solar energy production will decrease linearly due to natural ageing of the photovoltaic panels. For comparison, a generator set must be replaced completely every three or four years.
Impact in practice
- 1586 homes supplied
- 160,000 litres of fuel oil saved
- 400 kWp of installed power
- 554 MWh produced per year
- 25 years of initial operating life
As part of this project for 8 solar power plants, 26 direct full-time jobs have been created in Gabon for periods varying between 6 and 24 months. Once the Ndjolé power plant is installed, staff activity will be reduced and will relate to maintenance of the system and land as well as cleaning the solar panels every six months, requiring two people for a week.
Ausar Energy, specialised in solar power plants
The technical team at Ausar Energy, a subsidiary of ENGIE Africa, has built up experience in the design and management of projects to install solar power plants of more than 20 MW at remote sites. The companies selected by Ausar Energy and ENGIE Africa to install the solar power plants in Gabon, namely Sagemcom and Engie Maroc, have carried out comparable installations in Morocco, Cameroon, Burkina Faso, Niger, Tanzania, Madagascar and Zambia. The installation of the equipment is guaranteed for 10 years.
Ausar Energy is a subsidiary of our Group, specialised in decentralised
production solutions based on renewable energies. Its missions:
- Developing a dedicated offer of hybrid solar power plants with storage for isolated grids in Central and West Africa
- Serving the regions and the main electricity operators in a way that has the most social and economic impact
- Developing projects to strengthen and maintain access to energy in isolated sites on the African continent that are off-grid or connected to poor quality grids
- Developing clusters of projects in the countries of Central and West Africa:
plant engineering after detailed on-site study, validation of projects with local authorities and operators, setting up projects, financial engineering, etc.
- Ensuring sustainable energy autonomy for isolated sites at a constant cost per kWh
- Reducing the operating budget for isolated sites by providing quality, reliable and continuously available electricity
- Avoiding grid extension costs
- Settling populations and enabling local economic development through strengthening access to energy by fuelling income-generating activities.
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