question

taylortops avatar image
taylortops asked

Multiplus-II Hum

My new unit hums at 50Hz to the point where it's disturbing my sleep. It will hum for about 2hrs then will go silent for 1/2hr, then repeat that cycle. Everything seems to be functioning normally. The hum is independent of load. Cooling fan comes on normally as required.

My older MP2 does not hum like this. Is there a way to resolve this hum in the new unit?

Multiplus-II
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nickdb avatar image nickdb ♦♦ commented ·
noise cancelling airpods work a treat.
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taylortops avatar image taylortops commented ·
Interestingly, after putting the MP2 in parallel with the other MP2, the hum has completely stopped.
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1 Answer
Nico Bayer avatar image
Nico Bayer answered ·

Try updating the multi to the latest firmware.

https://community.victronenergy.com/questions/107607/why-does-my-mutliplus-hum-stain-with-ac-power-and.html

Does the hum correspond with a specific load switching on and off?

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