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Grid & Utility Issues

W03 (Grid Phase Wrong) Fault on 12kW 3 Phase Sunsynk inverter

February 18, 2026February 16, 2026 by sammyigt

This was a site I was called out to where a 12kW 3 Phase Sunsynk inverter kept periodically presenting a W03 (or grid phase wrong fault). It would go in to W03 randomly and then clear the error itself after a while. Now normally a W03 is just a phase rotation error and can be … Read more

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