{"id":1457,"date":"2012-04-03T08:43:20","date_gmt":"2012-04-03T06:43:20","guid":{"rendered":"http:\/\/en.sma-sunny.com\/?p=1457"},"modified":"2017-12-13T15:55:49","modified_gmt":"2017-12-13T14:55:49","slug":"what-does-an-off-grid-system-actually-do","status":"publish","type":"post","link":"https:\/\/www.sma-sunny.com\/en\/what-does-an-off-grid-system-actually-do\/","title":{"rendered":"What Does an Off-grid System Actually Do?"},"content":{"rendered":"

Dry red earth. The sun is shining. PV modules are gleaming in the light. The PV plant is operating at full capacity. We\u2019re in Mali. An off-grid system was just recently commissioned here in this western African country. And now it\u2019s supplying electric current to private homes, a school, several workshops, a hotel, and a number of businesses. Building an off-grid energy system like this one requires a reliable inverter that can create and manage a power distribution grid. And ours is called the Sunny Island. It provides a means to supply electricity to under-developed areas or even closer to home in a remote cottage in the German Alps using renewable energy.<\/p>\n

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Listen to the radio when the sun is shining<\/h5>\n

There are various possible options when setting up a stand-alone grid. A simple and easy method is to connect the loads directly to the device generating the power, for example, a PV cell. When the sun shines, the radio works. Another typical example is storing the solar energy in a battery for use later on. This method is referred to as direct-current coupling, or DC connection, where the device generating the electricity is connected to the load. It means that the direct current from the PV cell is used directly or stored in a battery for later use. However, the load needs to operate on DC for this to work, which isn\u2019t always a viable option in terms of costs.<\/p>\n

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Solar Energy for Off-grid Areas<\/h5>\n

Direct-current coupling is still viable for small PV plants; however, it is not the case with energy supply systems with several energy sources and loads. Under-developed regions only add to this difficulty. Nevertheless, it is still possible to supply energy to remote areas if we apply AC coupling. This principle combines all components of the energy system, i.e., the systems generating the energy and the loads, on the alternating current side.<\/p>\n

\"Volker<\/a>

Volker Wachenfeld, Vice President of the division off-grid solutions<\/p><\/div>\n

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Using the Sun, Wind, and Water<\/h5>\n

The Sunny Island battery inverter is connected to a battery bank and constitutes the AC grid. It is possible to integrate a variety of methods into this off-grid power distribution grid in order to generate electricity, particularly when using renewable energy sources: PV plants, wind turbine systems, hydroelectric power plants, and small CHP plants. And the best part about it is that the system is flexible. It can be fed with locally-sourced energy like from the sun, wind, or water. The system can be adapted to ideally match the local conditions. Even diesel generators can be integrated into the system. They can be resorted to when the state of charge of the battery is low and provides insufficient electricity for users. Small Sunny Island systems can be gradually expanded into larger-scale systems as a result of the parallel connectability of all energy sources and loads, depending on the electricity demand and available financing.<\/p>\n

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Principle of an Off-grid System<\/h5>\n
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Sunny Island by SMA<\/div><\/div>
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