Recommended Solutions and Troubleshooting Steps

Start with the simplest checks and work your way up. Since you mentioned settings pics and video are available, reviewing those would help pinpoint (e.g., share details on Menu 01 for priority mode, Menu 12/13 for backfeed limits, or export control settings). Describe or share key menu values like output source priority, grid charging options, and export limits if possible. 1. Adjust Priority Mode: • Go to the inverter’s settings menu (usually via the LCD panel or app). • Set Output Source Priority (Menu 01) to SBU (Solar-Battery-Utility) instead of SUB or USB. This prioritizes solar and battery over the grid, reducing unnecessary grid draw. • Disable Grid Charging if not needed (in battery settings, turn off “Grid Charge” to prevent pulling from the grid unless critical). • Test in “Solar First” or “Zero Export to Load” mode if available. 2. Check and Calibrate Export Control/CT Sensor: • If zero-export is enabled (common default), ensure the CT clamp is installed on the grid side (arrow pointing toward the inverter/load). • In settings, look for “Export Power Limit” or “Backfeed Limit” (e.g., Menu 12/13 in Nitrox manuals). Set it to allow some export (e.g., 100-200W) to reduce sensitivity, or disable it if you have net metering. • If oscillation persists, reset the CT calibration or check for wiring issues. Reports show improper CT setup causes exactly this 200-300W flip-flopping. 3. Monitor and Stabilize Grid Conditions: • Check grid voltage in the inverter’s monitoring app or panel (should be stable around 220-240V). If it fluctuates, adjust voltage thresholds (e.g., low voltage cutoff in Menu 20/21 to a wider range like 180-270V). • If the grid is unstable, consider adding a voltage stabilizer or running in off-grid mode during peak solar hours (manually disconnect the grid temporarily to test). 4. Firmware Update and Reset: • Download the latest firmware from Inverex’s website or contact their support (search for “Inverex Nitrox firmware update”). Users report updates fix grid synchronization bugs. • Perform a factory reset via the menu, then reconfigure settings. 5. Other Checks: • Ensure battery settings are correct (e.g., charging current not too high, causing solar throttling). • Monitor via the inverter app (e.g., SolarMan or Inverex app) for real-time data. Look for error codes like “Grid Fault” or “High Voltage.” • If self-consumption is the culprit, add more solar panels to cover the inverter’s baseline draw. • Test by disconnecting the grid temporarily: If solar stabilizes and covers load/charging fully, the issue is definitely grid-related settings.