Energy solutions for distant locations. Remote, self-sufficient, i.e., off-grid, power supply, ideal for regions where no connection to the public power supply grid is available or perhaps none is planned because of the high cost of building an electric power distribution network, especially in distant rural areas.
The MINI-GRID system supplies the electric power these areas require, supplying power to single-family homes, street lights, water pumping stations, or whole rural towns over a local electrical grid separate from and unconnected to national public electrical networks.
MINI-GRID system components:
The diagram shown is for a photovoltaic generator grid connection and a grid-connection inverter, with optional bidirectional battery backup and a diesel generator set using an inverter/charger.
When there is surplus power in the system, the batteries are charged (inverter/charger as the charger). Power previously stored in the battery (inverter/charger) is used when output by the photovoltaic generator alone is not enough to meet grid power demand.
A diesel generator set may need to be used, especially in months when solar irradiance is low. Using the inverter/charger, the generator set is capable of meeting grid supply demand and charging the battery at the same time.
Examples of Atersa MINI-GRID systems:
The installation comprises a three-phase, 400V MINI-GRID system, 3 6kW off-grid single-phase inverters, and 3 12kW three-phase grid-connection inverters plus a generator set for backup.
Atersa has designed and installed a 31.3kWp, 400V, three-phase mini-grid system consisting of 108 ULTRA A-290P panels, 6 4.6kW off-grid single-phase inverters, and 2 15kW three-phase grid-connection inverters that provides power for a drinking water system (extractor pump, reverse osmosis system, supply tank pump, and chlorination) and for a power distribution network to supply electricity to the village's 43 homes and other public buildings.
This MINI-GRID power plant is composed of 500 Atersa ULTRA A-300P panels, 12 4174 Ah batteries, 15 6kW off-grid inverters, and 6 25kW grid-connection inverters.
Atersa is the Elecnor Group's subsidiary specialising in photovoltaic solar energy, providing comprehensive solutions for national and international solar projects.