question

Charlie avatar image
Charlie asked

too many buzzing noise complains coming from Multiplus-II

wow, searching the community there's just too many complains about transformers sound level. Definitely not suited for apartments.. Whats your opinion?

Multiplus-II
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3 Answers
Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @Carlos,

One important thing to note in your research is the serial number of the MultiPlus-II (both that you might be purchasing, and that is being reported/the complaint).

The electronics design in the MP-IIs has been improved to run the fan better and have it make less noise.

The control, and thus the noise, is improved for all speeds except full speed. In other words, at 100% fan speed, there is no difference between the old and the new models.

image-6.png

This fan noise improvement is seperate to a frequency hum from the transformer, which will be the same (and also depends a lot on the local grid AC input).


image-6.png (30.1 KiB)
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Charlie avatar image Charlie commented ·

Hi @Guy Stewart (Victron Community Manager)


The fan noise is not an issue according to my research. As you stated, Its the frecuency hum from the transformer. What's the quietest Victron inverter in that regard for US grid system 120v or 120/240? I'm willing to pay more for a quieter experience.

Regards!

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nickdb avatar image nickdb ♦♦ commented ·

I can confirm the fan improvements are much better than the older units. A welcome change.

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iand avatar image iand commented ·
Hi @Guy Stewart (Victron Community Manager)


Can you clarify when external fans are turned on, assuming this is done using an assistant?

Is this as soon as the internal fans start, only when they reach 100% speed, or somewhere in between?


Thanks :-)


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baxter avatar image baxter commented ·


Very interesting, thanks for the update on the fan noise topic. May I ask you to provide more details on the improvment of the electronics design? Is it the PWM signal of the fan? Thanks in advance!
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grobalt avatar image grobalt commented ·
Would be nice to know what the modification looks like .. there are many users that would like to adopt the solution to existing setups.
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peterthemoose avatar image peterthemoose commented ·

Dear @Guy Stewart (Victron Community Manager)

How about frequency humming noise from the transformer? Have you found any solution for that? I just got 3 pcs. of MultiPlus-II 48/8000/110-100 230V installed in my garage and hear that humming all over the house. I will have to return them if my installer finds no solution for that.

Best regards!

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tyr avatar image
tyr answered ·

I have 3 HQ2210 units with really awful fan noise - is the improvement a software fix (better, less choppy pwm regulation) or a hardware improvement?

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Rob Duthie avatar image Rob Duthie commented ·

About time too!! so is this a hardware fix or software fix?

What about older versions that need fixing?

The only fix i found to make is much quiter was a fan change and rubber mountings and a capactor across the fan terminals.

Maybe Victron should supply a kit to effected models that can't be fixed ?

Regards
Rob D

NZ

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maa avatar image
maa answered ·

Too bad, I had one HQ2211

:(

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