Fronius export limiting erről szól.
So called “export limiting” is where the Utility or network operator restricts the amount of energy from PV system that goes into the grid. I.e. excess energy that is not consumed on the site. In order for the end user to gain the maximum amount of energy from the system without exceeding the export limit, the inverter output needs to be able to follow the site load.
The Fronius Datamanager 2.0 is able to limit the inverter output power dynamically and therefore to control and limit the amount of energy which is export into the grid in accordance to the consumption of the loads.
The Datamanager Card 2.0 offers the following options to control the power output of the inverter:
-
- Modbus RTU
-
- Modbus TCP
-
- 8-bit binary input
-
- Dynamic Power Reduction using the Fronius Smart Meter
Therefore there are two possible ways to achieve export limiting with Fronius Inverters:
-
- Using the Fronius Smart Meter. Datamanager controls the inverter as a Master
-
- 3rd party controller issuing commands to the Datamanager.
The simplest and most cost effective way to achieve export control with Fronius inverters is to use the Fronius Smart Meter. The meter measures the amount of energy imported or exported to the grid and the Datamanager uses these values to calculate the appropriate output power of the inverter to limit the export to the grid.
This document describes how to set up export control using the single phase or 3-phase Fronius Smart Meter.