Decode fault codes, trips and alarms on grid-tie and hybrid inverters, and fix the root cause.
8 in-depth guides
Why PV overvoltage alarms appear on cold, bright mornings, how to calculate maximum string voltage with temperature correction, and how to fix an oversized string before it damages the inverter.
Inverter error codes look cryptic, but almost every brand groups them into the same handful of categories. Learn to decode any fault code, use the event log, and decide what you can check yourself.
Blank screen, no LEDs or stuck on "Waiting"? Work through the DC supply, start-up voltage, isolators, fuses and internal faults in the right order to find why your solar inverter won't start.
What a residual current, leakage current or GFCI fault on a solar inverter means, how it differs from an isolation fault, and how to find wet cables, damaged insulation and nuisance-tripping RCDs.
Why solar inverters reduce output or shut down on hot afternoons, how to tell normal thermal derating from a real fault, and practical fixes for ventilation, mounting and fan failures.
Your inverter says No Grid, Grid Lost or Utility Loss even though the house has power. Here's how to trace the problem from the inverter terminals back to the meter, safely and in the right order.
Why grid-tie solar inverters trip on high or low grid voltage, how to tell whether the problem is your wiring or the DISCOM's supply, and the fixes that actually work in India.
What an isolation, Riso or PV earth fault on a solar inverter really means, why it shows up on damp mornings, and a safe, systematic way to find the faulty string, connector or module.