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Solis GRID-INTF: Grid Interference

Updated June 2026 · Reviewed for technical accuracy · ~2 min read

GRID-INTF (grid interference, code 1030) means the Solis detected interference or distortion on the grid that it could not safely sync to, so it stopped. It often relates to a noisy or distorted supply, or to the AC connection between the inverter and the grid. A restart clears many cases; a recurring GRID-INTF points to the supply or wiring.

What usually causes GRID-INTF

  • A distorted or noisy grid, sometimes from other equipment on the same supply.
  • A poor AC connection between the inverter and the grid.
  • A transient grid disturbance a restart resolves.

How to handle it

  1. Power-cycle the inverter. AC breaker off, then the DC isolator, wait 5 minutes, restart. A transient GRID-INTF often clears.
  2. Notice the pattern. Does it coincide with other heavy equipment switching on, or a particular time of day? That hints at where the interference comes from.
  3. Have the AC connection checked. A loose or poor AC connection can trigger it. This is an installer task.
  4. For persistent GRID-INTF, your installer may review the AC cabling and, in some cases, add grid filtering, or raise the distortion with your utility.
When to bring in a professional A recurring GRID-INTF usually means a genuinely distorted supply or an AC wiring issue. Your installer can check the connection and supply quality rather than leaving the inverter to keep tripping.

Related Solis codes

OV-G-V, Grid overvoltage G-PHASE, Unbalanced 3-phase NO-Grid, No grid

FAQ

Is GRID-INTF a fault with my inverter?

Usually not. It reflects something on the grid side (distortion or a poor AC connection) that the inverter cannot safely sync to. Restarting handles transients; a recurring one needs the supply or AC wiring looked at.

Sources

  • Solis inverter alarm-code list (GRID-INTF = grid interference; check grid distortion and AC cable connections, set grid filters, restart).
  • Solis installer documentation.
⚠️ Safety disclaimer. Solar inverters carry lethal DC and AC voltage even when "off". This guide covers a safe power cycle only. AC connection and supply checks must be done by a licensed installer or electrician.