Solar & Power Systems Error Codes
Understand error codes on solar inverters, battery systems, and power management devices from all major brands.
Solar inverters, battery storage systems, and power management devices are becoming increasingly common in homes and businesses. These systems use error codes to indicate issues with grid connection, panel performance, battery health, and safety systems. Understanding these codes is important for maintaining optimal energy production and ensuring system safety. This section provides explanations for error codes across major solar and power system brands, including what each code means, likely causes, safe troubleshooting steps, and guidance on when to contact your solar installer or a licensed electrician.
Common Brands
Common Error Code Formats
E001Arc FaultGrid ErrorIso FaultPV OvervoltageError Code Guides (11)
Generac Error Code 1505 – Meaning, Causes & Fix
Generac · Standby Generator · 1505
Fronius State 567 Error – Meaning, Causes & Fix
Fronius · Solar Inverter · State 567
Tesla Powerwall Backup Gateway Offline – Meaning, Causes & Fix
Tesla · Powerwall / Backup Gateway · Backup Gateway Offline
Generac Error Code 1902 – Meaning, Causes & Fix
Generac · Standby Generator · 1902
SMA Inverter Error Code 7701 – Meaning, Causes & Fix
SMA · Solar Inverter · 7701
Tesla Powerwall Grid Fault Error – Meaning, Causes & Fix
Tesla · Battery Storage System · Grid Fault
Fronius Error Code 509 – Meaning, Causes & Fix
Fronius · Solar Inverter · 509
SMA Inverter Grid Fault Error – Meaning, Causes & Fixes
SMA · Solar Inverter · Grid Fault
Generac Error Code 2800 – Meaning, Causes & Fixes
Generac · Generator · 2800
Fronius Inverter Error Code 102 – Meaning, Causes & Fixes
Fronius · Solar Inverter · 102
EcoFlow Error Code 401 – Meaning, Causes & Fix
EcoFlow · Portable Power Station · 401
Frequently Asked Questions
Is it safe to troubleshoot solar inverter errors myself?
You can safely perform basic checks like verifying the inverter display, checking breakers, and restarting the system. However, any work involving electrical connections, wiring, or opening the inverter should only be done by a qualified solar technician.
Why does my solar inverter show a grid error?
Grid errors typically occur when the utility power quality falls outside the inverter's acceptable range (voltage or frequency). This can be caused by grid instability, a tripped breaker, or wiring issues.
Will my solar system work during a grid error?
Most grid-tied inverters shut down during grid errors for safety. If you have a battery backup system with islanding capability, it may continue to power your home independently.