We now have optimized the warranty claim process. If you are an end user / consumer, we suggest you contact your installer directly, to lodge the warranty claim. Or you can contact our local service center directly, they are also happy to support you. If you are distributor or installer, please sign to your OSS account to lodge a warranty claim form. If you do not have an OSS account, please visit https://oss.growatt.com/ to register one, or contact our local service center for further assistant.