Hi Guys, 

How could you set up the parameter 11 in the Growatt Inverter (max AC IN), when using Li battery ?

I already did it with my previous inverter (on the same model SPF-5000-ES). But now, with the last update, I can't.

My problem is that my backup inverter (main failed with a burned diode on MPPT board), make  my diesel generator circuit breaker tripping.

The generator is kohler sdmo 10 LC (10Kva) and his circuit breaker is tripping intempestivelly after 10 min of running of charging (4 battery Pylontech US2000C).
The generator has a 32A output, connected to the inverter. All grouds wires are connected to each other, and generator in addition have ground wire ! 
 

 

In my data analyser (solar Assitant) i don't find any peak or problem. The generator push 4,8KVa and some minute latter ... circuit breaker tripping.
During 1 year, i never had this comportment of the Generator and i suspect that the inverter cause the trouble now. 

 

 

This is why I want to reduce the power of AC IN in the inverter, but I don't see how to do it.

If you have any experience, please let me know it would be appreciated.

Thanks in advance to all of you guys.

Take care.

 

I think that the inverter have wrong parameters.
when i check program 2 i can read that Max current is 80A.

Mine is 100A... How it's possible ?

 

2 hours ago, AlexSolar said:

But now, with the last update, I can't.

The 8kw,10kw and 12kw can charge up to 120A. Maybe the last update is the problem.

You can e-mail or Whatsapp Amos in China normally quite a quick response.
+8613267189226
[email protected]

Edited May 1, 20242 yr by TaliaB

1 hour ago, AlexSolar said:

I think that the inverter have wrong parameters.
when i check program 2 i can read that Max current is 80A.

Mine is 100A... How it's possible ?

 

@AlexSolar Why don't you reduce the charging current, I personally think it's to high

Edited May 1, 20242 yr by Antonio de Sa

36 minutes ago, Antonio de Sa said:

@AlexSolar Why don't you reduce the charging current, I personally think it's to high

Because i can't... The inverter does not allow me to change this value because i'm using LI battery.

what do you think about Factory reset the inverter ? 
Press up and down arrow then enter password: 305

?

Program code 2 is set by the BMS in Li mode and cant be user changed
To get around that use US2 mode until your Inverter is sorted.
As a matter of interest, what is your setting in program code 11?

Edited May 1, 20242 yr by zsde

18 minutes ago, zsde said:

Program code 2 is set by the BMS in Li mode and cant be user changed
To get around that use US2 mode until your Inverter is sorted.
As a matter of interest, what is your setting in program code 11?

In program 11, i have 80A

Today, I did 2 things

1 - I reseted my inverter. The Values of program 11 and 2 seem to be correct now.
2 - I placed between my inverter and the generator a circuit breaker of 20A instead of 32A. The Generator circuit breaker is a 32A.

I tested and the 32A circuit breaker of the Generator has jumped before the 20A on the other side .... I deduced that the problem is on the generator circuit breaker... I will short it !

But, my problem is always the same. How to limit the current of the charging battery from the inverter in Li Mode
Or, in // mode, will the inverter automatically manage the same generator power source ?

Do you have any idea Guys or someone in the same configuration ?

Take care.

 

Edited May 1, 20242 yr by AlexSolar

With this Inverter you have to accept the fact that the Li Protocol fixes the charge rate according to the BMS instructions.
US2 mode is the only way to manipulate it. Whether we agree or disagree with the Growatt program implementation is another question. There may be more expensive Inverter that allow this. With our Growatt middle of the range Inverters it's not currently possible.

There is a possible solution, but it costs some moohla.
An interface board that is placed between the BMS and the Inverter which can be manipulated to do what you want amongst some other functionalty.
https://www.patreon.com/collection/205967?view=expanded

Andy from the off-grid Garage actually showcased this interface board.
 

 

Edited May 2, 20242 yr by zsde

3 minutes ago, zsde said:

With this Inverter you have to accept the fact that the Li Protocol fixes the charge rate according to the BMS instructions.
US2 mode is the only way to manipulate it. Whether we agree or disagree with the Growatt program implementation is another question. There may be more expensive Inverter that allow this. With our Growatt middle of the range Inverters it's not currently possible.

@zsde @AlexSolar have been running my two Growatt 5000 ES in parallel for close to three years on US2 mode. I like it as I can change the charging settings both from solar or grid as circumstances allows it. I honestly prefer to do it that way. I have to admit I'm at home all the time so I can do it. Also run my system on either SUB or SBU, again depending on load and weather conditions. I set the voltages slightly lower than the battery OEM recommendation and I get it to 99% SOC.

See attached dashboard. Last seven days.

 

Thank you for the updates Guys.

I understand that they have 2 kind of working mode With this inverter. 

1. You define yourself the parameters, but you have to manage all chargins parameters
2. You lets inverter manage parameters, but now you could not set the battery input current. (Previously that was possible)

Editings parameters like you said @zsde is not on my plan due to risk of battery overheat.

Thank you guys, for your help another time !

You are the best !