Critical What does this mean?

A safety-rated fault — there may be a risk of electric shock, fire, or equipment damage. Do not try to fix this yourself. Call a qualified electrician.

Solis Inverter ILeak-Fault Error: Meaning, Causes & Safe Fix

Your Solis inverter measured high leakage current on the grid side and shut down to protect against electric shock. Do not touch the equipment.

What should I do first?

Two quick questions — we'll point you to the right starting point.

Is this code still showing on your inverter's display?

What this code means

ILeak-FAULT means 'high grid leakage current' (variants 01–04 are escalating thresholds). It is the inverter's residual-current safety system tripping — current is leaking to earth somewhere in the AC or DC wiring, which is a shock hazard, so the inverter disconnects.

What is this downtime costing you?

Rough estimate while your system isn't producing. Adjust the numbers to match your setup.

System size (kW) Peak sun hours / day Electricity rate ($/kWh)

–per day

–per week

–per 30 days

≈ – kWh of lost production per day.

Estimate only — assumes ~80% real-world output vs. nameplate. Actual losses depend on weather, shading, panel direction, and your tariff.

Common causes

Current leaking to earth through damaged AC or DC wiring insulation
Damp conditions affecting connectors or cabling
Loose AC or DC connection, or a faulty internal cable connection

Safe steps to try

Work top to bottom, ticking off each step as you complete it. 0 of 5 done.

Do not touch the inverter, its cables, or the mounting
Note the exact code and variant from the display
One documented restart only (AC OFF, DC OFF, 5-minute wait, DC ON, AC ON), and only if everything looks and smells normal
If the code returns, stop — do not keep resetting
Contact your installer or electrician and mention the exact variant shown

Is your inverter still under warranty?

Before paying for a repair, check — your installer may fix this free.

Brand Year installed

Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.

When to call an electrician

Call your installer or an electrician immediately. High grid leakage current is a shock hazard — finding it requires insulation testing by a qualified professional. Never open the inverter or handle cables to investigate.

Frequently asked questions

What is the difference between ILeak-FAULT and ILeak-PRO?

ILeak-FAULT reports high measured leakage current on the grid side; ILeak-PRO is the leakage-current protection trip. Both are safety shutdowns for the same kind of hazard and both need a professional.

Can I just keep resetting it?

No. This is a safety protection, not a glitch. It will keep tripping until the leak is found and fixed by a professional.

It appeared after heavy rain — is that related?

Rain and moisture are classic triggers for leakage faults. If the code appears in wet weather, tell your installer — it helps them locate the fault.

Need a professional?

This fault is a safety risk — do not attempt to fix it yourself. Contact a qualified solar electrician in your area.

Sources: meaning and troubleshooting verified against the manufacturer's documentation — Solis-1P(1-6)K-4G_V1.3 User Manual (Ginlong Solis), Table 8.1