Lodge a warranty RMA form online and provide all the required information (DC and AC Voltages). A replacement unit will be sent to you within 10 working days. Our inverters offer exciting and innovative features that make installation easier, and deliver the maximum efficiency over a much wider power range compared to transformerless inverters from competitors. It is your responsibility to follow up your replacement status. Please note that once the case is approved you cannot change the shipping address, if this is required. . Delta is a pioneer in solar energy solutions and has the most efficient and durable solar inverters for a wide range of applications. From simple residential installations to expansive commercial projects and colossal PV plants, Delta's inverters consistently deliver unparalleled performance and. . Delta's new generation single phase solar inverter M Series with UL certification and HECO, CA Rule 21 compliance, are creative and innovative single phase inverters with an impressive MPPT operating range for the market. The inverter's performance, easy. .
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