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Inverter Error Codes Explained
Your inverter shows error and status codes to flag issues with your incoming and outgoing power. Find your brand below to understand the most common codes and what to do next.
Common error codes
What your inverter is telling you
Your inverter is the heart of your system — it keeps your power stable and flags anything unusual with an error or status code. Many can be fixed simply by restarting the inverter once you know what the code means. Find your brand below. Still having issues? Call our office on (08) 9300 9324 or book a service.
Fronius
102 – High Voltage: Western Power's grid voltage is too high and the inverter shuts down to protect itself. Monitor over 2–3 days; if it persists we'll lodge an over-voltage submission with Western Power. 567 – High Voltage (ramping down/smoothing): grid voltage is rising and the inverter is ramping down (an Australian standard); increasing the load in the house can help. 996 – Communication error: the inverter has lost the portal/internet — usually after changing provider, Wi-Fi password or going NBN; see our Wi-Fi Reconnect guide. 475 – Earth Isolation: possible water ingress in an isolator or panel/plug (can also trigger in very low morning light); lodge a service ticket or call us. 301 – Internal (DC) error: restart the inverter, press enter and wait 5 minutes; if the green light doesn't return, lodge a service ticket. 306–307 – Low PV/DC: low DC from the panels; normal early morning/late evening, but if it shows mid-day restart the inverter, then lodge a ticket if it persists. 509 – No power for 24 hours: usually a blackout or grid surge; restart the inverter.
SolarEdge
SolarEdge shows a number from 1–8 for any alert. Alerts 1 & 2: communication has been lost between the internet and the inverter — check your monitoring portal for online/disconnected, then follow our Wi-Fi Reconnect guide. Alerts 3 to 8: these represent various inverter issues — please create a service ticket and one of our team will investigate and respond within 48 hours.
Sungrow
2, 3, 14, 15 – Grid Overvoltage: grid voltage too high and the inverter shuts down to protect itself; monitor 2–3 days and we'll lodge an over-voltage submission if it persists. 4, 5 – Grid Undervoltage: grid voltage below the inverter's allowable limit; it usually reconnects once the grid returns to normal — monitor 2–3 days and raise a service ticket if it repeats. Disconnect / No connection – Communication error: the inverter has lost the portal/internet, usually after a provider, password or NBN change; see our Wi-Fi Reconnect guide.
SMA
1 – Grid Fault: grid voltage too high and the inverter shuts down to protect itself; monitor 2–3 days and we'll lodge over-voltage if it persists. Grid Undervoltage: grid voltage below the allowable limit; usually reconnects when the grid normalises — raise a service ticket if it repeats. 10248 – No WLAN connection possible: lost portal/internet, usually after a provider/password/NBN change; see our Wi-Fi Reconnect guide. 3501 – Insulation Fault: the inverter has detected a ground fault in the PV array; please create a service ticket.
Huawei
2032 – Grid Loss: a grid outage, or the AC circuit is disconnected / AC switch is off; check all breakers are on and the property has power. 2033 – Grid Undervoltage: grid voltage below the allowable limit; usually reconnects when the grid normalises — raise a service ticket if it repeats. 2062 – Insulation Fault: the PV array is in a moist environment and not well insulated to ground; create a service ticket. 2081 – Optimiser Fault: an optimiser is offline or faulty; create a service ticket. 2068 – Battery abnormal (minor): the battery is disconnected, the switch has tripped, or the battery is faulty; create a service ticket. No WLAN connection: lost portal/internet, usually after a provider/password/NBN change; see our Wi-Fi Reconnect guide.
Still need help
Log a service ticket
If you're still having issues with your inverter, fill in the form and one of our knowledgeable service techs will contact you as soon as possible.
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