Solar Error Code Library

Solar Error Code Library

By Renew Solar Services
Updated October 20, 2026

Look up what your inverter, microinverter or monitoring app is telling you. Each page explains one fault in plain English, using the manufacturer’s own documentation: what it means, which equipment shows it, what’s safe to check, and when it needs a licensed electrician.

Code still showing, or not sure what it means? Renew Solar Services diagnoses and repairs inverters, microinverters and monitoring systems throughout Nassau and Suffolk County.

Get Solar Troubleshooting Help Call (631) 500-5115

Search by code or message

ManufacturerEquipmentCode / messageWhat it means
SolarEdgeSingle-phase inverters (LCD and SetApp)Isolation Fault — Error 25, 2x19, 18x86The array isn’t properly isolated from ground; a safety fault for a qualified technician
EnphaseIQ8 microinvertersDC Resistance Low – Power Off (solid red LED)A microinverter found low resistance to ground and shut off; cleared only with installer tools
SunPowerPVS5 / PVS6 monitoringPVS6 / PVS5 offline — Internet Communication DownUsually the monitoring unit has lost its connection; the panels may still be producing
EnphaseM215 / M250 microinvertersM215 / M250 model guideProblems, replacement units and upgrade options for older Enphase systems

Browse by manufacturer

Before you look anything up

  • Write down exactly what you see — the code, the message, the LED colors, and when it started.
  • The same number can mean different things on different equipment or firmware. Each page lists the equipment it applies to.
  • Don’t open equipment or touch wiring. Solar systems carry high DC voltages. The checks on these pages are limited to what the manufacturer tells owners they can safely do.

Renew Solar Services is authorized to service and repair SolarEdge and Enphase systems, and we service legacy SunPower and other brands across Nassau and Suffolk County. If your code isn’t listed yet, call (631) 500-5115.

About Renew Solar Services
Renew Solar Services

Renew Solar Services repairs, upgrades and services solar systems for homeowners and roofing contractors across Nassau and Suffolk County. Led by a Licensed Master Electrician.

Request service from Renew

Tell us what your inverter, app or monitoring is showing and our licensed electricians will follow up. Serving homeowners across Nassau and Suffolk County.

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