First: safety
A solar system carries high DC voltage from the panels even when the grid is off, and batteries can push large currents. Never open the inverter cover, never pull DC cables while the system is running, and keep children away from the inverter and battery area.
What the error usually means
Every brand uses its own codes, so look up your exact model in the manual or the brand's app. Broadly, errors fall into a few groups:
- Grid errors (voltage or frequency out of range): often from WAPDA/DISCO supply problems; the inverter waits and reconnects by itself.
- PV or isolation errors: possible moisture, a damaged cable or a connector problem on the panel side.
- Battery errors (low, over-voltage, communication): battery settings, a weak battery or a loose battery cable.
- Over-temperature: the inverter is too hot; check that its vents are not blocked and it is not in direct sun.
- Overload: too many heavy appliances at once, such as AC, motor and iron together.
Safe checks you can do
- Take a clear photo of the error code and the inverter's model label.
- Check that the AC and DC breakers are in the ON position. If one has tripped repeatedly, don't keep switching it on: call a mistri.
- Switch off a few heavy appliances and see if an overload error clears.
- Restart only as the manual describes, in the order it gives.
- If the inverter has a Wi-Fi app, check the history: it shows when the fault started.
Call a mistri when
If your inverter is still under warranty, contact the seller first. Repairs by others can void the warranty.
- You smell burning, see smoke, or hear crackling.
- A breaker keeps tripping.
- The same error returns after a restart.
- The battery is swelling, leaking or very hot.