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Usually self-clears

Solis NO-Grid: No Grid Detected

Updated June 2026 · Reviewed for technical accuracy · ~3 min read

NO-Grid (code 1015) means your Solis cannot detect the utility grid, so it stops exporting and waits. Most of the time this is not a fault: it is a power cut or a tripped breaker on the AC side. When mains power returns, NO-Grid normally clears by itself.

Grid, wiring, or inverter?

  • A utility outage. Check whether the rest of the house has power. If the whole place is out, it is a grid cut, just wait.
  • A tripped breaker or open isolator on the AC line between the inverter and the meter.
  • A loose AC connection at the inverter or board.

How to check it safely

  1. Is there a power cut? Look at the rest of the house. If the grid is down, NO-Grid clears when power returns. Nothing to fix.
  2. Check the AC breaker. Find the breaker between the inverter and the grid and make sure it is on; reset it if it tripped.
  3. Confirm the main supply has power.
  4. Allow the reconnection delay. After power returns, the inverter waits a short, standards-required time before it comes back online. This pause is normal.
  5. Grid present but NO-Grid stays? Power-cycle once. If it still won't connect, the AC connection may need an installer's look.

Quick decision flowchart

NO-Grid appears
↓ is the rest of the house also without power?
✅ Yes, whole house out → grid cut. Wait; it clears when power returns.
❌ No, house has power → check the AC breaker to the inverter.

Related Solis codes

OV-G-V, Grid overvoltage UN-G-V, Grid undervoltage GRID-INTF, Grid interference

FAQ

NO-Grid shows but my house has power.

The inverter sees the grid only through its own AC connection. If a breaker on that line is off or a connection is loose, it reads "no grid" even though the house is powered. Check that breaker first.

How long until it clears after power returns?

Grid-tied inverters wait a short, standards-required reconnection delay (often a few minutes) once the grid is stable. A brief wait is normal.

Sources

  • Solis inverter alarm-code list (NO-Grid = no grid detected; confirm grid is connected and operational).
  • Solis installer documentation.
⚠️ Safety disclaimer. Solar inverters carry lethal DC and AC voltage even when "off". This guide covers external, switch-level steps only. Never open the unit or work on wiring unless qualified. When in doubt, call a licensed installer or electrician.