Thanks for the additional detail. Maybe after next payday I will try to source the components for your DIY option to at least try to filter out my PC plug noise like you did. 

I was only entertaining the test with their filter as I want to see where the matter turns out to go with Sunsynk and Deye, they are requesting a video showing my tests so will make one for them over the weekend and see what they say. From other users testing I knew it won't work. Didn't expect it to be worse though LOL. 

1 hour ago, Wiggly Electron said:

Regarding a DIY solution, I am looking for a supplier of a large toroidal core, which will make the whole winding process very easy. This will make it a viable solution for the general hobbyist. Will make a post as soon as I find something.

How large a toroid?

this reminds of the saying price, reliablility, performance, pick any two... so in the case of the inductor it'll be price, inductance, current carrying capability, pick any two... how about an air core inductor... no chance of saturation...

Anyone had any success on this issue? Recently joined the unpleasant harmonics club. Thanks!

I will be attempting to replicate the filter Wiggly Electron built and shared in previous posts, seems like that might be the only solution.

The filter Deye / Sunsynk provide to solve this is a waste of time and effort. 

Thought I'd share some comedy to cheer everyone up... pretty funny to me what he mentions considering the topic of this and multiple other threads of reports coming from end users.

 

Hi all

Here is the update on how to make your own inductor to filter out the noise coming from the inverter.

First off, you will need a core to wind your wire around. A toroidal core will be the easiest to work with and will also radiate the least amount of EMI. The bigger the core, generally speaking, the better as you will be able to get more windings on it with a thicker wire. Here is the biggest one I could find with a good permeability:

https://www.mantech.co.za/ProductInfo.aspx?Item=82M1485

 

The enamel wire diameter will determine the amount of amps it will be able to handle. I would recommend using 1-1.6mm diameter wire. You can find a good variety from Communica.

https://www.communica.co.za/products/eccw-1-25

Just note that thicker wires will be more difficult to work with, but will obviously be able to handle more current. Here is a website to give you an idea of the current carrying capability of different wire thicknesses:

https://www.powerstream.com/Wire_Size.htm

 

How many turns do you need? Well you would want to wind the inductor to get you an inductance of at least 1mH, but more than 5mH would probably be overkill. You can calculate the exact number of windings you'll need with a nifty program called Coil64:

https://coil32.net/download-coil64-for-windows.html

For the above-mentioned core and wire, you will need about 50turns to get 1mH and 75turns for 2mH. (The inductance goes up with the square of the number of windings and the resistance of the wire goes up linearly with number of windings).

 

As mentioned before, you would place this filter "In-Line" by breaking either live or neutral and join the break through the inductor. 

Also, be sure to use a surge protector on the load side of the filter as inductors might cause voltage spikes when the current draw through it changes.

 

I still need to test my toroidal filter to see how many amps it can handle, but for now I can definitely say that it works in filtering out the noise to a level that is completely inaudible. The previous filter I made with the E-core handles 8 amps without getting too hot. I would guess that the smaller toroidal core will do about 3 amps, as I had to use a thinner 1.25mm wire instead of the 2mm wire.

Hope it helps!

 

Edited March 6, 20233 yr by Wiggly Electron

Just had a 5kw Subsynk installed. 1st 24 hours it ran without any noise. Woken up this morning and it was buzzing.

Is this normal ? How do I get it back to being quiet ? Or why did it not make a noise in the 1st 24 hours ?
 

17 minutes ago, starmage said:

Just had a 5kw Subsynk installed. 1st 24 hours it ran without any noise. Woken up this morning and it was buzzing.

Is this normal ? How do I get it back to being quiet ? Or why did it not make a noise in the 1st 24 hours ?
 

Hi @starmage

What kind of buzz is coming from your inverter? A 50Hz hum or a 15kHz high pitched wine? 

mm not sure - but it did start just after our load-shedding ended this morning. I have contacted my installer and he will be sending someone to have a look
All looks OK and I don't see any faults on the inverter, just the annoying buzz/hum

Have attached the sound

19 minutes ago, starmage said:

mm not sure - but it did start just after our load-shedding ended this morning. I have contacted my installer and he will be sending someone to have a look
All looks OK and I don't see any faults on the inverter, just the annoying buzz/hum

Have attached the sound

Sounds like you are talking about the noise at the inverter itself and not from other devices in the house? So far each install I checked makes that buzzing sound at the inverter, it does get louder when the MPPT's start working harder as the sun gets stronger. I have my inverter in a cupboard (with some cooling) but when I close the door I can't hear it anymore.

My issue is the noise that comes from my PC setup as soon as I connect it to the wall plug then the inverters buzz comes from my PC and screen. I have taken my screen to multiple other 5kw installs and experienced the same buzzing from every single one of them. Like others have said this is a hardware design flaw on the 5kw.

37 minutes ago, starmage said:

mm not sure - but it did start just after our load-shedding ended this morning. I have contacted my installer and he will be sending someone to have a look
All looks OK and I don't see any faults on the inverter, just the annoying buzz/hum

Have attached the sound

This sounds like a low frequency hum. It isn't directly related to the 15kHz noise discussed earlier in this thread. I'm afraid there isn't much you can do about it unless the unit is in fact faulty and you can get it replaced. But based on what I have heard it's quite common for these inverters to make that noise.

Ok....but then why did it not make any noise in the 1st 24 hours and it only started after our last round of load-shedding ended - I did more than 13kWh yesterday and didnt hear anything throughout the day

Edited March 9, 20233 yr by starmage

15 minutes ago, starmage said:

Ok....but then why did it not make any noise in the 1st 24 hours and it only started after our last round of load-shedding ended - I did more than 13kWh yesterday and didnt hear anything throughout the day

It does not sound normal to me , i have never heard anything like that from mine . I would get the installer to come and check it out .

And just my luck - the noise stopped. All is now quiet - and that was before the installer was here

Looks like some weird combination of things (PV starting up (the sound started +-just after 6 and was basically gone when we checked now @ 9), Eskom online (LS ended @ 6), low load (+- 400w))
WIll keep my eye (or ear ) on it - installer had a check and all looks good (he had to add some surge protection device to the PV strings).
So yea this is just weird

Maybe that's the fans? 

Great news for 5kw and I believe firmware is fixing it for 8kw users as well. Please see post here for update: 

 

On 2023/03/15 at 4:15 PM, DiSiNTiGR8 said:

Great news for 5kw and I believe firmware is fixing it for 8kw users as well. Please see post here for update: 

 

Hopefully this works. The high pitch noise is irritating

Any one know if Deye has or is pushing a similar software update?

It was a Deye engineer that I was talking to in the mail trail who initiated the update and pushed the setting so I am sure they will. 

Hi all, any further info on how to solve this?  @Wiggly Electron any news for an off the shelf solution?  Also, could you PLEASE elaborate on your ferrite core solution above, and more importantly how to install it (lets say in front of a PC power input)?

1 hour ago, DamnedDutch said:

Hi all, any further info on how to solve this?  @Wiggly Electron any news for an off the shelf solution?  Also, could you PLEASE elaborate on your ferrite core solution above, and more importantly how to install it (lets say in front of a PC power input)?

Did you ask them for the firmware upgrade that allows the new low noise setting? Works for the 5kw inverter not sure about the 8kw. 

@DiSiNTiGR8, thanks for the ping, and I only saw the firmware upgrade solution over the weekend.  Yeah, so I'm working through GoSolr...  So I'll let you know when an engineer arrives within the next 2 years...

Just look at what Eskom has done to us...we have thousands of South Africans winding coils and applying firmware updates to get rid of harmonic whining. LOL

Huzzah!!  Unbelievably GoSolr got back to me via a 3rd party engineer.  He confirmed that this is an issue with the 5kw inverters.  He first tinkered with some of the settings (all remote), but to no avail.  He then contacted GoSolr for a remote firmware update, which took about 30 mins.  The inverter rebooted automatically, and the new option was available.  I ticked the box, the alarm sounded, the inverter rebooted...   Booyah!  Whizzz gone!

Thanks to all on this group for the moral support through this dark and lonely road....  😉

 

Hi All,

I posted last year about an annoying 15khz high pitched sound coming out of the sunsynk inverter. This was also coming out of my appliances and was driving me mad! 
 

I wanted to report that this issue has finally been resolved by sunsynk. 
 

you need to download the latest update and then get your installer to login to your profile. They then go to “plant list” on the sunsynk platform and click “low noise mode”.

your inverter will then turn off for a minute probably with an error F13 (grid mode changed). It will then turn back on and the high pitched noise will disappear.

They have effectively used a low pass filter and instead of the frequency being at 15khZ, it’s now at 20kHz which is just above human hearing.