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High pitched noise from Sunsynk 5 kW inverter


Tariq
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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

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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...

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  • 2 months later...
I have also had the same problem with the high frequency noise on an 8kW unit. My previous unit at my previous residence was a 5kW unit that I used for about a year, which did not give this noise. When I got my new 8kW in May 2021 at my new residence, I had it installed in the scullery. The high frequency noise was barely audible to my installer because it is around 15,000Hz, but to me it is so loud that I could hear it from 10 metres away, and spending 10 minutes in the scullery doing dishes left me with my ears feeling physical discomfort for an hour or so afterwards. After I had run the system for 2 days, I asked the installer to take the unit back to be assessed by tech support, and he was informed by someone (I'm not sure who he spoke to, I think it might have been Shabir from Sunsynk support, not sure...) that they will not swop out the unit because that is just how the Sunsynks sound, and chances are good that if they give me another unit it will be even louder. I then had to pay my installer another installation fee to move the whole setup outside the house, which was another 2 days' work. I was quite disappointed in the supplier for not swopping out the unit.
 
So to anyone considering a Sunsynk, put it in the garage or outside the house, as the high frequency noise seems to be the luck of the draw.
 
(EDIT:  I had the software upgraded, which did not make a difference)
Edited by Bernardf
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On 2021/02/27 at 11:04 PM, Tariq said:

a high pitched noise emanating from the inverter, which also coming from tv, Xbox, a ups,

Does the noise only come from the inverter or also audible from all these devices? If also from TV etc, from the device itself or from their speakers?

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  • 2 weeks later...
1 minute ago, Tariq said:

that is great service

Agreed - was also impressed

1 minute ago, Tariq said:

Does your inverter make the high frequency noise when grid is switched off

I only ever had it connected to battery, no grid. Once the inverter had completed the start-up procedure and 'clicked', the noise immediately started. Left it running for 20 mins like this but no change

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3 hours ago, Tariq said:

My friend can even hear it through a clothing iron, his is model with the fan

😕 Has he tried raising it with his seller?

You mean with the external fan in the back, right? Then I think it is also v1.4 like mine was

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@wolfandy He is in contact with Shabbir at Sunsynk, wants them to fix the problem on HIS inverter, as there is no guarantee that the new inverter will not have the same noise issue and then the process starts all over again.

 Yes, he has the v1.4 with the fan 

Edited by Tariq
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3 minutes ago, Tariq said:

He is in contact with Shabbir at Sunsynk, wants them to fix the problem on HIS inverter, as there is no guarantee that the new inverter will not have the same noise issue and then the process starts all over again.

Good luck to him

My replacement v1.5 is sitting with my complex security, waiting for me to return back home and install it on Saturday. As my other v1.5 was fine, I am hoping so will this one be

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6 minutes ago, wolfandy said:

Good luck to him

My replacement v1.5 is sitting with my complex security, waiting for me to return back home and install it on Saturday. As my other v1.5 was fine, I am hoping so will this one be

Maybe he should wait till you install yours this weekend and give us a report, then we might be able to say that the v1.5 has taken care of the problem 

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