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I don’t have the a Freedom Inverter but ours does hum a little. Not very loud but you can hear it. Most all inverters will hum a little but if you believe it is excessive then I would look for loose mounting hardware or panels.
It’s louder if batteries need charging or if it under a heavy load.
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2002 American Eagle 40M
ISL400 / Spartan MM
2003 Jeep Liberty/2019 Jeep Trailhawk
I have the same inverter and I notice that it hums a little but it seems to be worse if the battery cables are touching the side of the battery cabinet because of the slight vibration of the cables.
Linear Mode
