Tariq 99 Posted February 27 Share Posted February 27 Commissioned a Sunsynk 5kW inverter this evening, there is a high pitched noise emanating from the inverter, which also coming from tv, Xbox, a ups, etc, if the grid is switched off and the load is running on batteries, there is no noise Firmware version is 2138 Quote Link to post Share on other sites
branderplank 4 Posted February 27 Share Posted February 27 Also had this when I initially commissioned mine. With the cover plate on it was less annoying. At some point I had switched off the inverter completely and disconnected the batteries. When I turned on everything again, the pitch was really bad. After a few days I decided to just switch it off with the power button underneath the inverter - did not switch off anything. When I switched it back on, the pitch was virtually gone (it is there but really really faint only audible when I get your ears in really close). Not a technical solution but just what I experienced. Vassen mentioned that it was worse with a certain firmware upgrade and then improved thereafter again... Quote Link to post Share on other sites
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