Hello all,

I've got 3 units of Growatt spf 5000es in 3 phase configuration.

Once i turn on some heavy compliance (Electric Kettle - 2KW, AC- 2.5KW) i can hear that the UPS beeps for a second and then stops. it sounds like a voltage drop or something like that.

Any ideas for solution?

Thanks,

Arthur

3 hours ago, terkazarian said:

Hello all,

I've got 3 units of Growatt spf 5000es in 3 phase configuration.

Once i turn on some heavy compliance (Electric Kettle - 2KW, AC- 2.5KW) i can hear that the UPS beeps for a second and then stops. it sounds like a voltage drop or something like that.

Any ideas for solution?

Thanks,

Arthur

Just confirm if it is voltage low of the battery the moment you switch on the kettle. When a kettle is cold the 1st few seconds it will draw more power as the heating element gets hot. 

i understand that, but it happens also when the power comes from the solar or the battery (no matter what SOC).

if the UPS is activated during that time, i guess that the other appliances that are not protected with a UPS are getting "dirty" electricity. 

if i will add another inverter in serial to the heavy load phase, will it fix the problem?

11 hours ago, terkazarian said:

i understand that, but it happens also when the power comes from the solar or the battery (no matter what SOC).

if the UPS is activated during that time, i guess that the other appliances that are not protected with a UPS are getting "dirty" electricity. 

if i will add another inverter in serial to the heavy load phase, will it fix the problem?

If you not over 5kW when you switch on the kettle then one must locate the problem on this phase that feeds the kettle. Check if you can see the actual load when this happens. 

If the load is high on this phase look at balancing the phases. 

15 hours ago, terkazarian said:

Hello all,

I've got 3 units of Growatt spf 5000es in 3 phase configuration.

Once i turn on some heavy compliance (Electric Kettle - 2KW, AC- 2.5KW) i can hear that the UPS beeps for a second and then stops. it sounds like a voltage drop or something like that.

Any ideas for solution?

Thanks,

Arthur

Just to confirm is the 3 Growatt inverters parralel synchronized or are you using 1 inverter/ phase.

Edited April 6, 20242 yr by TaliaB

the phase is not loaded, i'ts not near the 5kw max

3 Growatt inverters are synchronized to work as 3 phase mode 

What batteries and panels are connected @terkazarian?

 

53 minutes ago, terkazarian said:

3 Growatt inverters are synchronized to work as 3 phase mode 

Is the firmware versions exactly the same?

Edited April 6, 20242 yr by TaliaB

26 minutes ago, GreenFields said:

What batteries and panels are connected @terkazarian?

 

10kw canadian solar and 30kwh seplos 200a batteries.

the problem accurse no matter what power source in use 

1 hour ago, TaliaB said:

Is the firmware versions exactly the same?

I think that would be quite an important detail!

1 hour ago, Derek3 said:

I think that would be quite an important detail!

2 inverters are from newer version and one is a older

14 minutes ago, terkazarian said:

2 inverters are from newer version and one is a older

You need to update the firmware on the older one to the newer firmware, all 3 inverters must have the same firmware i am surprised that they are synchronized.

Totally dependent on which Inverter edition he has. The Firmwares of the later versions cannot be crossflashed,
The original was the 40 series, then 2 years ago they brought out a "refreshed" series which has the 60 series Firmware and last year they brought out the latest with the 110Series Firmware. 
Attempting to flash the incorrect series Firmware either fails or bricks the Inverter.  It needs controller board changes to be able to accomplish this.
I have one original one with 40 Series and one with 110 Series Firmware and they are paralleled with no issues. So they do communicate. Whether there is a 3 phase issue I can't say.
Growatt in their wisdom use the same model number, yet they use different controller boards and Firmware.
See this older thread which contains references to it and also links to the Growatt site where the Firmwares can be downloaded.

 

Edited April 6, 20242 yr by zsde

46 minutes ago, zsde said:

Totally dependent on which Inverter edition he has. The Firmwares of the later versions cannot be crossflashed,
The original was the 40 series, then 2 years ago they brought out a "refreshed" series which has the 60 series Firmware and last year they brought out the latest with the 110Series Firmware. 
Attempting to flash the incorrect series Firmware either fails or bricks the Inverter.  It needs controller board changes to be able to accomplish this.
I have one original one with 40 Series and one with 110 Series Firmware and they are paralleled with no issues. So they do communicate. Whether there is a 3 phase issue I can't say.
Growatt in their wisdom use the same model number, yet they use different controller boards and Firmware.
See this older thread which contains references to it and also links to the Growatt site where the Firmwares can be downloaded.

 

you are correct, can't much the firmware (screen shots attached), if there is a newer version for one of the models, please let me know.

all syncs up and work, so far there is only 2 problem, the first one as described here and also a new one that the system is not going to ac bypass mode when overloaded (option 18 is enabled), it cuts the power and auto restarting.

My latest Inverter that I paralleled has the exact same Firmware with C05 at the end and I have not seen any update.
Perhaps contact Amos to establish if has some advice or documentation and Firmware that they can share.

You can mail or Whatsapp Amos in China 
+8613267189226
[email protected]

He is quite responsive.
 

4 hours ago, zsde said:

My latest Inverter that I paralleled has the exact same Firmware with C05 at the end and I have not seen any update.
Perhaps contact Amos to establish if has some advice or documentation and Firmware that they can share.

You can mail or Whatsapp Amos in China 
+8613267189226
[email protected]

He is quite responsive.
 

Thanks, will do. will they able to answer anything than firmware?
is anyone here have a similar setup as mine that can share their experience, how it work for them?

11 hours ago, terkazarian said:

Thanks, will do. will they able to answer anything than firmware?

Amos is the International Rep of Growatt and he supports all queries from the community.

btw, Growatt has a URL where they post the Firmwares for all the Inverters. This site is maintained by the same Amos

https://www.amosplanet.org/firmware-download-for-off-grid-inverter/  

Edited April 7, 20242 yr by zsde

11 hours ago, zsde said:

Amos is the International Rep of Growatt and he supports all queries from the community.

btw, Growatt has a URL where they post the Firmwares for all the Inverters. This site is maintained by the same Amos

https://www.amosplanet.org/firmware-download-for-off-grid-inverter/  

Thanks

The problem is in the inverters. I had 3 x SPF5000ES now I have 3 x SPF6000ES in 3-phase. The voltage drop when an intensive load is switched on is reflected in all inverters. This is related to a sharp drop in the HV bus level. Simply the capacity of the HV bus is not sufficient to compensate for the sudden increase in consumption or the control of the DC/DC converter is too slow.

On 2024/04/09 at 9:42 AM, apam said:

The problem is in the inverters. I had 3 x SPF5000ES now I have 3 x SPF6000ES in 3-phase. The voltage drop when an intensive load is switched on is reflected in all inverters. This is related to a sharp drop in the HV bus level. Simply the capacity of the HV bus is not sufficient to compensate for the sudden increase in consumption or the control of the DC/DC converter is too slow.

so if i will add another inverter to the most loaded phase it should fix the problem? or i need to switch to SPF6000ES?

On 2024/04/09 at 9:42 AM, apam said:

The problem is in the inverters. I had 3 x SPF5000ES now I have 3 x SPF6000ES in 3-phase. The voltage drop when an intensive load is switched on is reflected in all inverters. This is related to a sharp drop in the HV bus level. Simply the capacity of the HV bus is not sufficient to compensate for the sudden increase in consumption or the control of the DC/DC converter is too slow.

i can't find any info about HV bus, can you please explain about it?

The high voltage bus in the inverter has approx. 380 - 460VDC. It is the source of current for the inverter and battery charger and at the same time the place where all DC power sources meet. In very simple terms, the energy in this bus is accumulated in capacitors that have enough capacity to smooth out the current peaks created during regulation.

The SPF 6000ES won't improve your condition, probably adding another inverter per phase might help, but that's just a guess I haven't verified.

One more thing, the overload bypass does not work in a 3-phase connection! It is the same for all SPFxx00ES.

2 hours ago, apam said:

The high voltage bus in the inverter has approx. 380 - 460VDC. It is the source of current for the inverter and battery charger and at the same time the place where all DC power sources meet. In very simple terms, the energy in this bus is accumulated in capacitors that have enough capacity to smooth out the current peaks created during regulation.

The SPF 6000ES won't improve your condition, probably adding another inverter per phase might help, but that's just a guess I haven't verified.

thanks you very much for the info, will try to add another inverter to the most busy phase