1.Check the PV switch.

check if the PV switch is ON.On this inverter, for example, you need to turn the switch from vertical to horizontal to turn PV ON (follow the mark on the switch of your own inverter).If the PV switch is OFF, the APP will not show any PV power.

2.Check the PV voltage with a multimeter.
If the PV switch is ON and you still cannot see PV power on the APP or on the inverter LCD screen, use a multimeter to check the PV input.If the multimeter shows there is PV voltage, but the PV power on the inverter screen and APP is still 0, then there may be a problem with the inverter, and it needs to be checked or repaired.

3.Check the main switch of the inverter.
Finally, check if the main switch of the inverter is ON.Turn it ON, then wait about 1 minute.After that, the inverter should start, and you should be able to see the PV power on the APP and on the LCD screen.

1.Make sure the CT is firmly clamped on the correct cable.

If the CT is loose or not installed correctly, the system cannot control grid power, and your loads will take power from the grid.

2.Open the APP and see if the discharge time setting is turned ON.

If it is ON, check whether the current time is inside the discharge time period you set.If the current time is outside this period, the battery will not discharge, and your loads will use power from the grid.

3.Check the target voltage in the APP.

Find the target voltage setting.This is the voltage value where the battery stops discharging.Make sure the target voltage value is lower than the current battery voltage.If the target voltage is higher than the battery voltage, the battery will not discharge, and your loads will use power from the grid.

4.Check the discharge power in the APP.

Find the discharge power setting.This is the maximum battery discharge power.Make sure this value is higher than your load power.

For example: if your load is 4000 W but the discharge power is set to 3000 W, then the extra 1000 W will still come from the grid.

Avoid control conflicts


In AC-coupled mode, the host uses frequency/power droop to regulate micro-inverter output. If grid AC charging is also enabled, you effectively have two chargers in parallel with different algorithms, which easily causes power tug-of-war, SOC estimation chaos, and even zero-export control oscillations.
 


Prevent backfeed and compliance risks


Enabling AC charging draws power from the grid; if micro-inverters are generating at the same time, a loop of grid → battery → grid/load can form. This is hard for zero-export/grid-limit control to stabilize, and some regions prohibit “grid-to-battery-to-grid” arbitrage. Mutual exclusion avoids these risks at the source.
 


Hardware and metering boundaries


On the 6T, the AC port shares detection and protection for both the grid/backup interface and the AC-coupled source. Current-sensing and relay paths are common. Running both concurrently makes it difficult for the controller to distinguish, within milliseconds, between “grid charging” and “micro-inverter backfeed.” For protection, measurement, and energy accounting, it is safer to disable grid charging at the architecture level.

Yes, we are mainly doing customized products according to the customers’ drawings or samples. 

 We focus on renewable energy products including PV-string and turbine grid-tie inverters, hybrid inverters as well as inverters plus batteries all in one unit.

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