There are situations where the PV system may stop performing MPPT. The following outlines common scenarios and possible reasons why the PV system may suddenly stop performing MPPT.

1. When Zero Export or Export Power is Set to 0

When the export is set to Zero Export or Export Control is set to 0, the PV power will be adjusted to match the load power demand, and the inverter will not output excess power to the grid.
In this case, it is normal for the PV system to stop performing Maximum Power Point Tracking (MPPT) because the system does not need to produce any additional power.

2. When the Battery is Fully Charged and the Load Power is 0 or Small

If the battery is fully charged and the load power is 0 or very small, the system will not produce excess power from the PV system. This is also a normal phenomenon because there is no energy consumption requirement, so the PV system does not need to continue generating more power.
If the customer has set the sub mode, the battery is usually close to being fully charged in this mode, and such situations are likely to occur.

3. When the Battery SOC is Not Fully Charged, but PV Power is Sufficient and PV is Not Performing MPPT

If the battery's state of charge (SOC) is not full and there is enough PV power, but the system is not performing MPPT, the first thing to check is the battery Max Charge Current setting. Too small of a charging parameter may prevent the inverter from performing MPPT as expected.

4. Upgrade to the Latest Firmware Version

If all settings have been checked and everything seems correct, but the PV system still cannot perform MPPT, please check the firmware version and upgrade to the latest firmware version (15.09 or above).