Growatt Inverter Error Code 304
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Growatt error 304: AC frequency out of range
Growatt error code 304 usually means the AC frequency from the grid is outside the inverter’s permitted operating range. When this happens, your inverter may temporarily disconnect from the grid to protect the system.
This is usually not an internal inverter fault. It is a safety response that stops the inverter from feeding power into the grid when frequency moves outside the approved operating limits.
AC frequency issues can sometimes occur due to local grid fluctuations, network instability, temporary frequency changes or wider electricity network conditions.
Let e-Solar check your inverter and grid frequency
If the code appears once and clears by itself, your inverter may simply be reacting to a temporary grid condition. The inverter will usually keep monitoring the grid and resume operation once frequency returns to the permitted range.
If Growatt error code 304 keeps returning, it is worth having the system checked. Our Perth-based solar team can inspect the inverter, review your system settings and help determine whether the issue is linked to grid frequency, inverter settings, site wiring or the wider electricity network.
Contact e-Solar and let us know:
- The exact error code on the screen or app
- When the code appears
- Whether your solar production has dropped
- Your inverter model, if you know it
Do not open the inverter or attempt electrical testing yourself. If the issue is persistent, a qualified technician may need to test the grid supply, review inverter settings, inspect the AC connection or advise whether the issue should be raised with the network provider.
Get In Touch Today
Not sure what the error code means? Send us a quick message with a photo of your inverter screen. We’ll help identify the issue and guide you towards the safest next step.
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Growatt Inverter Repairs and Fault Support
We understand that every solar system is different, which is why our repair and fault-finding services cover a wide range of Growatt inverter models. If your inverter is showing error code 304, our experienced technicians can help determine whether the issue is linked to grid voltage, inverter settings, site wiring or wider network conditions.
With over 22 years supporting Perth solar systems, e-Solar has seen all kinds of inverter faults and performance issues. We’ll assess your system safely, explain what the code means, and recommend the right next step to help get your solar running properly again.
e-Solar supplies and supports a wide range of Growatt inverter systems across Perth, including hybrid and battery-ready models:
- Growatt MIN 5000TL-XH Grid Inverter
- Growatt MOD 5000TL3-X Grid Inverter
- Growatt SPH 5000 Grid Inverter (hybrid)
Trust e-Solar for reliable Growatt inverter support backed by local experience, honest advice and long-term solar care.