Growatt Inverter Error Code 400
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Growatt error 400: DC overload
Growatt error code 400 usually means the inverter has detected a DC overload. This can happen when the DC input from the solar panels exceeds what the inverter can safely handle.
When this happens, your inverter may temporarily stop operating, reduce output or disconnect from the system to protect internal components.
This type of fault may be linked to high solar input, incorrect string configuration, inverter sizing issues, panel mismatch, DC cabling problems or another fault on the solar panel side of the system.
Book a solar inverter check with e-Solar
If the code appears once and clears after a restart, your inverter may have responded to a temporary DC input condition.
If Growatt error code 400 keeps returning, your solar output has dropped, or the inverter is not operating normally, it is worth having the system checked. Our Perth-based solar team can inspect the inverter, review the DC inputs and help determine whether the issue is linked to overload conditions, solar string design, inverter sizing, DC cabling or another system fault.
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 DC electrical testing yourself. If the issue is persistent, a qualified solar technician may need to test the solar array, inspect DC cabling, review string configuration and confirm the inverter is operating within safe limits.
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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 400, 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 solar 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.