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before the over-frequency trip threshold is reached.
When the grid is down and the hybrid inverter requires an AC Coupled inverter to reduce power,
it simply shifts the output frequency up slightly, and the grid-interactive inverter will limit its output
power accordingly after sensing this frequency shift.
When the grid is up, the frequency is dictated by the grid and the hybrid inverter will reduce exported
power if the frequency goes up.
4.8.1 AC Coupling Settings
The AC couple setting must be enabled when connecting an existing on-grid system to the GEN terminal.
Start SOC (%): The SOC at which the AC coupled inverters are turned on when in off-grid mode (50% to
70% recommended).
End SOC (%): The SOC at which the AC coupled inverters are shut down when in off-grid mode (90%
recommended).
When on-grid and export to grid are enabled, the AC-coupled inverter will always be on, and it will sell
any extra power back to the grid. Ensure you are allowed to sell power to your utility provider when
using AC-coupled PV arrays on-grid.
Note: It is recommended to keep the Start V/SOC and the End V/SOC within 5-10% of each other for
optimal operations when utilizing AC Coupling.
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