Deye 5k Hybrid Buzzing into my PC power Supply and some chargers!

[mahdi89]

Deye 5k Hybrid inverter Buzzing into my PC power Supply and some chargers!

i have tried fer-rites cores(31&77 materials)
..and RFI AC suppressor
nothing of them worked!
The noise is only there when i am on deye / never when on grid/ generator (directly)

please help

 

[mrzed001]

Strange.

Deye, not Sol-Ark, so it is a 230-240V EU model ?

Can you check the inverter's output with an oscilloscope ?

Also can you check the PE-L_out and PE-N_out Voltages when in inverter mode (not bypass)?
Like in a blackout. So to see if it has an inner PE-N relay and if it is working or not (and floating)

 

[mahdi89]

Strange.

Deye, not Sol-Ark, so it is a 230-240V EU model ?

Can you check the inverter's output with an oscilloscope ?

Also can you check the PE-L_out and PE-N_out Voltages when in inverter mode (not bypass)?
Like in a blackout. So to see if it has an inner PE-N relay and if it is working or not (and floating)

yes its 230v
i have two deye (one for my parents)
both are doing the same, so its a deye thing? unless i have 2 faulty .
i have ordered a mini oscilloscope waiting it to arrive
i have grounded the neutral to earth when no gird ( island mode ) and there is no float
my pc/cpu wont do that noise even when i am on a non sine-wave inverter(cheap one).
what do you think it is? RF? Magnetic? sinewave problem ?

 

[mrzed001]

Could be coil whine.

Just a (weak?) theory:
When on utility then the frequency is sliding constantly up and down 0,01-0,05 Hz.
And there are harmonics on the line

But when in inverter mode there is no frequency changes and no (less) harmonics.
And the pure constant power amplifies the coil whine (and the dirty line breaks it before it becomes noticeable).

You can test it if you can borrow and use (like in a blackout) a good sine UPS.
And usually they do not have as good sine wave as the inverter.

 

[mahdi89]

Could be coil whine.

Just a (weak?) theory:
When on utility then the frequency is sliding constantly up and down 0,01-0,05 Hz.
And there are harmonics on the line

But when in inverter mode there is no frequency changes and no (less) harmonics.
And the pure constant power amplifies the coil whine (and the dirty line breaks it before it becomes noticeable).

You can test it if you can borrow and use (like in a blackout) a good sine UPS.
And usually they do not have as good sine wave as the inverter.

The noise is not there on (grid/generator)
And its not there in cheap non sinewave ups and on pure sine wave up
The noise is only on deye inverter
The noise disapear when i use a 220 to 110 tranformer as my pc psu can accept (110-220v)

 

[mrzed001]

The noise is not there on (grid/generator)
And its not there in cheap non sinewave ups and on pure sine wave up
The noise is only on deye inverter
The noise disapear when i use a 220 to 110 tranformer as my pc psu can accept (110-220v)

Strange.
I would like to know what causes this.
When the oscilloscope arrives can you make some measurements ?

Until then the noise is there if you put a bigger load to the inverter?
A capacitive, a resistive, an inductive ?

 

[mahdi89]

Strange.
I would like to know what causes this.
When the oscilloscope arrives can you make some measurements ?

Until then the noise is there if you put a bigger load to the inverter?
A capacitive, a resistive, an inductive ?

sure

Amazon.com

bought this..(arrive next week) never used one before hope it find the problem
i think that both ups i have are transformer ups
but the deye is a transformer-less ups
so the deye is sending a switching noise to my PSU
how to get ride of that noise i dont know..
as i really have paid a lot untill now trying to save this problem

 

[mahdi89]

Strange.
I would like to know what causes this.
When the oscilloscope arrives can you make some measurements ?

Until then the noise is there if you put a bigger load to the inverter?
A capacitive, a resistive, an inductive ?

can you explain ?

 

[mrzed001]

can you explain ?

Something is not right.
First it shows a PWM signal: 50,01Hz, 19,98ms
Full square PWM, not a round sine wave.

Then you zoom in and it becomes a descending sine wave? That is strange.

Try to measure first the utility power (bypass mode).
Then for comparison the Deye generated power (battery mode).
Now that video would be interesting

 

[mahdi89]

Something is not right.
First it shows a PWM signal: 50,01Hz, 19,98ms
Full square PWM, not a round sine wave.

Then you zoom in and it becomes a descending sine wave? That is strange.

Try to measure first the utility power (bypass mode).
Then for comparison the Deye generated power (battery mode).
Now that video would be interesting

i was not using the right probe.. check this and tell me if there is anything wrong

 

[mrzed001]

i was not using the right probe.. check this and tell me if there is anything wrong

It seems to be OK. A good sine wave.

When you zoom in into 200 micro sec (=0,2 msec) there is a little ripple. That is normal, inverters make the power with a 10-200 kHz signal.
If I read it correctly then there are 4 ripples between two vertical line so 0,2 msec/4 = 0,05 msec
1/ (0,05 * 10^-3 sec) = 20 kHz at least

I would say this is a very good and clear sine wave.
Try to make a comparison from utility, or other sine wave UPS. That will be messy compared to this.
Also you can check the sine wave with load on the output. Like your PC power supply

The V values are strange. Do not think it is 600V

Here are some scope values from generators (no need to zoom, the sine wave is sh-t):

Also an inverter generator (good sine wave):

 

[mahdi89]

It seems to be OK. A good sine wave.

When you zoom in into 200 micro sec (=0,2 msec) there is a little ripple. That is normal, inverters make the power with a 10-200 kHz signal.
If I read it correctly then there are 4 ripples between two vertical line so 0,2 msec/4 = 0,05 msec
1/ (0,05 * 10^-3 sec) = 20 kHz at least

I would say this is a very good and clear sine wave.
Try to make a comparison from utility, or other sine wave UPS. That will be messy compared to this.
Also you can check the sine wave with load on the output. Like your PC power supply

The V values are strange. Do not think it is 600V

Here are some scope values from generators (no need to zoom, the sine wave is sh-t):

Also an inverter generator (good sine wave):

so its a good inverter ? is there a way to stop the noise?

 

[mrzed001]

so its a good inverter ? is there a way to stop the noise?

This is a perfect sine wave. Literally, there is no noise

You can see some bad and noisy sine waves in the videos (previous post).

Use the scope while PC is running:
- Try it with grid power. There will be a lot of noise Maybe some deformation of the sine wave too.
- Try it from battery, only PC running. Check for visible strong noise.
- Try it from battery, under heavy load. PC + start some electric motor like pump or washing machine. Check if PC still buzzing ?

 

[copec]

When I installed my Deye 8k running in zero export to load mode has made some noise on some devices too, but only on some load combinations. I think it is related to how it injects power due to the power factor. It hasn't had any detrimental effects on anything as of yet.

 

[mahdi89]

When I installed my Deye 8k running in zero export to load mode has made some noise on some devices too, but only on some load combinations. I think it is related to how it injects power due to the power factor. It hasn't had any detrimental effects on anything as of yet.

will this affect devices reliability ?? like led lamps for example??

 

[Don B. Cilly]

My CC (Chinese Cheapo) sine wave looks better than that, nye nye :·)

 

[copec]

will this affect devices reliability ?? like led lamps for example??

I hope not, but I guess time will tell.

 

[madmes]

I have the same issue in my 12kw 3ph.
The noise generated covers the fundamental harmonics (50Hz, 100, 150, 200, 250, 300, 350, 400, and so on). Also notice the 20k frequency that was mentioned before, but we don't hear that.

 

[madmes]

Sometimes the buzzing goes away when i restart the system, other times it goes away on its own.