10tpeg Posted October 30, 2023 Share Posted October 30, 2023 (edited) Fan noise can be a problem, depending upon where your inverter is placed. In my case, it is in a utility space which happens to be near my wife's study. We recently took over a friend's 5kw Mecer inverter to replace our older 3kw Mecer inverter. My wife has hearing similar to a dog (please don't let her read this!) and she was bothered by a high pitched whine from the inverter fans. I experimented with lower charge rates which helped to some degree, but the whine was still there. This morning I took out the inverter and removed the 2 fans. I cleaned them, and then removed the sticker in the middle of each fan. I put 3 or 4 drops of sewing machine oil in each bearing, and then spun each fan using a hair dryer to let the oil work itself in. I stuck back the stickers, refitted the fans and put the inverter back. It really has made a big difference, and there is once more peace in the home (In more than 1 way!) Im going to order new 80mm x 80mm ball bearing fans with a 4 pins lead to replace these, but this was worth posting in case it helps others. Edited October 30, 2023 by 10tpeg re-phrased a sentence BigotedUncle, Mauritius B, Moffat and 1 other 3 1 Quote Link to comment Share on other sites More sharing options...
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