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Solis RelayChk-FAIL: Relay Self-Check Failure

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

RelayChk-FAIL (code 1035) means the Solis ran its self-check on the relay that connects it to the grid, and that check did not pass. The relay is the switch that physically links the inverter to your AC supply, so the inverter tests it before connecting. A one-off RelayChk-FAIL often clears with a restart; a persistent one needs a look.

What usually causes RelayChk-FAIL

  • A transient glitch a restart resolves.
  • An AC supply or connection condition the self-check did not like.
  • A genuine fault in the relay or its circuit on the inverter's board.

How to handle it safely

  1. Power-cycle the inverter. AC breaker off, then the DC isolator, wait 5 minutes, restart. A transient RelayChk-FAIL often clears here.
  2. Check the AC connection is sound. A poor AC connection can contribute. This is an installer task to verify.
  3. If RelayChk-FAIL keeps returning after a clean restart, the relay or the inverter's board likely needs service. Contact your installer or Solis.
When to bring in a professional The relay is a safety-critical connection to the grid. A persistent relay self-check failure should be serviced rather than reset over and over.

Related Solis codes

GRID-INTF, Grid interference OV-G-V, Grid overvoltage NO-Grid, No grid

Helpful guides

Error codes explained How to safely restart your inverter

Sources

  • Solis inverter alarm-code list (RelayChk-FAIL = relay self-check failure; restart, contact service if unresolved).
  • 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 relay or board work must be done by a licensed installer or electrician.