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

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...

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 May 26, 20215 yr by Bernardf

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?

In my case it only comes from the inverter.

57 minutes ago, Bernardf said:

In my case it only comes from the inverter.

Thanks. Am getting 2x 5kW installed tomorrow and will listen out for anything. Fortunately mine are installed in the garage

I also noticed a high pitched sound from the microwave after I added batteries to my 5k inverter. It's not too loud but will hear it when I walk past it.

Just switched my 2 new Sunsynks on - and also had a very loud high noise coming from one of them ☹️ So loud, that I can even hear it from the next room...

Will await the firmware upgrade tomorrow and then see if anything changes

Sent the noisy inverter back and received a replacement. Great service. Will mount the new inverter next weekend

@wolfandy, I have a colleague with a noisy inverter, what process did you follow to get a replacement 

5 minutes ago, Tariq said:

what process did you follow to get a replacement 

I sent it back to the shop that I purchased it from and they replaced it without any questions

This was the noise it was emitting: https://streamable.com/wgxchq (please turn up volume)

@wolfandyWow, that is great service. Does your inverter make the high frequency noise when grid is switched off

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

This inverter only makes the high frequency noise ONLY when on grid, 

9 minutes ago, Tariq said:

This inverter only makes the high frequency noise ONLY when on grid, 

Similarly loud noise as mine?

Mine was a v1.4

My 2nd inverter is v1.5 and virtually silent

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

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

@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 June 8, 20215 yr by Tariq

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

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 

47 minutes ago, Tariq said:

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 

Will post an update here on the weekend

@wolfandy, did you install the inverter 

7 hours ago, Tariq said:

did you install the inverter 

Yes, managed to get it up on the wall yesterday. Happy to report that I have no problem with the new one 🙂

On 2021/02/27 at 11:04 PM, Tariq said:

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

same here tariq.. noise coming from my pc(power supply) and my cordless phone  ..its so annoying

any recommendation? 

Edited February 10, 20224 yr by Mahdi

@Tariqwas a solution ever reached with Shabbir from Sunsynk?

@Bernardf did Keith from Sunsynk sort you out with a replacement unit?

Edited April 22, 20224 yr by Overblaze