FAQ About Anti-backflow
Q: What is PV anti-backflow?
A: In a PV system, when the generated power is greater than the user-side demand – meaning the load is unable to consume all the energy produced – the excess power flows to the grid. Since this current flows in the opposite direction to the conventional one, it is referred to as “countercurrent.”
Q: Why is anti-backflow needed?
A: There are several reasons to prevent excess electricity generated by the PV system from flowing into the grid:
In certain regions, it is prohibited or restricted for PV electricity to be fed into the grid.
Some PV projects, after installation, may not have obtained a license due to incomplete filing procedures or insufficient documentation, thereby preventing grid connection.
All electricity generated by the PV system is intended for self-consumption only.
Q: How to achieve anti-backflow?
Install a CT (Current Transformer) or meter on the grid-connected busbar to monitor real-time current direction and magnitude, which is then communicated to the inverter. Upon detecting current flow towards the grid, the inverter will reduce its output power until the countercurrent is eliminated, thereby achieving anti-backflow. It is important to note that the CT and meter themselves do not have anti-backflow capabilities; they simply collect data to enable the inverter to adjust its output accordingly.
Senergy Single-Phase Residential Anti-Backflow Solution
Senergy Single-Phase Residential Anti-Backflow Solution
