Good day everybody.

I was wondering if i can get some input/opinions.

I have a 5kw dye inverter connected to 6; 540w panels; running a 5kw greenrich battery. The system is just over a year old now and within the last 2 weeks i have noticed 2 things that weren't present before. firstly i noticed the sound the relay in the inverter makes when grid power goes out and comes back on; only the power doesn’t go off and my meter is still on; the AC led also stays illuminated, indicating grid power is available; however the grid icon on the lcd display shows off grid. This happens intermittently and can be at any time of the day. The condition lasts for about a minute and then you can hear the relay again and the display shows on grid again. When selecting the grid icon on the display all parameters shows normal apart from the current which drops to about 0.1A in the “off-grid state” which then picks up back to 0.9-1.0A when on grid again. 
 

secondly: also intermittent. when the panels are producing power a vibrating noise emits from the inverter sort of like a vacuum cleaner running in another room if that can explain it and the inverter gets quite warm to the touch. 
 

my system has been running smoothly up until i noticed the above mentioned. I also had a technician come look at it yesterday, but they were unable to find anything wrong. 
 

if anybody could please advise it would be greatly appreciated. 
 

 

Edited March 28, 20242 yr by rbc
Wrong topic title

Have you found a solution to your issue? During Summers I disconnect the grid completely using a breaker. Now I lifted the grid breakers on, and I experience the same issue as you. I have to inverters in parallel, on the second inverter, the relay makes that typical clicking noise every few minutes and the display picture says I am off-grid wile the AC led is green on both

On 2024/03/26 at 1:30 PM, rbc said:

running a 5kw greenrich battery.

what is your battery SOC at the point when it disconnects?

On 2024/03/26 at 1:30 PM, rbc said:

when the panels are producing power a vibrating noise emits from the inverter sort of like a vacuum cleaner running in another room if

That is most likely the internal cooling fan.

1. Grid supply getting out of range. Either voltage or frequency. Internal relay switches to off grid,.waits for 1 minute then reconnects if grid in range. If not, waits 1 more minute until grid in range.

Typically when this occurs, the grid details screen should display grid voltage and 0.00 Hz until relay switches back to grid.

2. That would be the tiny & slow running internal fan.

Edited September 11, 20241 yr by zivva

WannabeSolarSparky.... How do we get in contact with you??

Hi colleagues, @rbc , not sure if you manage to fix this issue on your side.

Fyi I had the same problem with the relay in the inverter making a switching noise and then the LCD display shows Off grid despite the grid hasn't gone Off.

I found out the issue for me was that the voltage of the whole system was going up a bit (actually 253 volts) when i was generating a lot of Solar energy and my batteries were full.

I had the Over Voltage in the Inverter grid parameters set by default at 253 volts, and so when i was going up to 253 v for some times (>10 minutes), the relay would go off, and back on after 60 seconds (because i had the “Grid Reconnection time” set to 60 seconds), or longer if the voltage was still greater than 253 volts.

I changed the voltage limit from 253 v to 260 v and my problem disappeared.

I hope it helps.

 

With that, i have another problem you guys may have also experimented. this one i couldn't yet fix it, so any help woudl be appreciated.

If the Grid goes OFF, and the “Grid Reconnection time” is set to xx seconds, I can hear the Grid relay switching ON and OFF very quickly (it takes about ½ seconds for switching On and back OFF), every xx seconds.

As a consequence, when the relay resets (goes ON & OFF), it perturbates the Microinverters connected to the Gen port (which basically stops/restarts the roof solar panels and microinverters production), and it also reset for ½ seconds the ATS signal (when the “Signal Island Mode” option is checked) from 220V to 0V and back to 220V, faulting the Neutral bond to Hearth I have setup for ½ seconds every xx seconds.

Deye told me it could be a problem with the Grid relay, but I doubt this to be a hardware issue. To me it is most likely a software issue.

The reason is that the behaviors is aligned with the “Grid Reconnection time” parameter. If the Grid is OFF, and the “Grid Reconnection time” is set to 60 seconds, the relay will switch ON and OFF very quickly after 60 seconds. But if I set the “Grid Reconnection time” to 20 seconds, then the relay will switch ON and OFF after 20 seconds.

I would imagine the ON/OFF switching would be more random if it was a hardware issue.

Any idea?

Has anybody experimented the same ?

regards.

Stef

Hi so late to the party here but I have a fix using solar assistant and automation to the grid disconnect due to high voltage. Should be 253. So you could change it to 260 but that means your voltage will go out of spec and so will the grid.

Using solar assistant just set a automation when the grid voltage reaches certain voltage range to reduce the sell power thus lower the grid voltage. Anther thing is to schedule appliances like charging battery a little later or gyeser during peak times this lowering the amount needed to sell.

Fyi only solar assistant is required and the automation is really simple to do. It requires access to make changes on the inverter tho.