Zero export
Zero-export systems are systems that consist of power generation units and, if applicable, battery-storage systems. Such systems are not designed for feeding into the utility grid and they actively prevent this. The zero-export system from SMA maximizes self-consumption and uses 100% of the self-generated solar power. Our system lets customers expand the solar energy without high additional investments in the utility grids. This is necessary if the grid operator does not allow grid feed-in because of a weak infrastructure and possible overload, for example.
SMA offers a variety of solutions especially for PV systems that are no longer allowed or intended to feed solar power into the grid due to restrictions imposed by the grid operator:
Solution 1: Direct Self-consumption with Zero Export
An intelligent PV inverter is installed in the system. This inverter is configured for zero export and dynamically limits the power if it cannot be consumed locally at the same time it is generated ( > Interfaces and Functions).
When specifications at the point of interconnection are actively controlled, the SMA Data Manager M enables the limitation the active power feed-in for the connected SMA inverters and of third-party inverters to 0% as long as these are connected via SunSpec Modbus and support this function. Three-phase inverters as well can achieve zero export within 2 seconds in all three line conductors. For this, an energy meter with sampling intervals of 200 ms is required. The configuration of this function is described in the operating manual
Solution 2: Self-consumption with a battery-storage system and zero export
By integrating a battery system into the PV system, a larger proportion of the consumption can be covered with electric current from the own PV system. The SMA Commercial Storage Solution meets all of the necessary requirements ( > PV solutions with commercial storage systems).
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