Can some please explain to me what is happening to my inverter.

I basically get it on a daily basis, and my installers cant figure it out either. I think it has something todo with the EPS. But i am not 100% sure.
Not sure if it helps but i have a Shotto 5kwh battery

 

 

My settings are as follows

Application Settings
EPS Voltage Set(V) = 230
PV&AC Take Load Jointly = Enabled

Charge Settings
Charge Current Limit(Adc) = 110
AC Charge = According to Time

AC Charge Start Time 1 = 00:00
AC Charge End Time 1 = 23:59

Generator Charge
Generator Charge Type = According to Battery SOC
Generator Charge Battery Current(A) = 30
Generator Charge Start Battery SOC(%) = 20
Generator Charge End Battery SOC(%) = 100
Max. Generator Input Power(W) = 7370

 

Any help will greatly be appreciated, this is what i am seeing on the app

 

 

 

 

Edited August 17, 20233 yr by R4nc1d

All speculation: Is this Shoto not a 0.5C battery? Or have they got a 1C version? Could tell better from a model number.

Try to set the battery charge and discharge limits to 50A DC, which is what the "typical" Shoto 0.5C normally takes. The BMS charge limit is showing a 0A maximum charge rate, so I hope that doesn't mean you've damaged anything by overcharging. 

Let's see if @TaliaB can give you some good answers and guidance. 

@R4nc1dDid your installer do the latest firmware version update if not they need to do firmware update as that sounds like reset relay clicking on and off. EPS is the output voltage of the inverter in islanding and is correct at 230v. Did the installer do a hard reset of the inverter. 1.Switch Eskom power off. 2.Isolate pv from inverter.  3.Disconnect battery from inverter. Wait for 15 minutes for caps to discharge. Reverse procedure but before connecting battery pre-charge inverter before connecting battery. 

6 minutes ago, TaliaB said:

@R4nc1dDid your installer do the latest firmware version update if not they need to do firmware update as that sounds like reset relay clicking on and off. EPS is the output voltage of the inverter in islanding and is correct at 230v. Did the installer do a hard reset of the inverter. 1.Switch Eskom power off. 2.Isolate pv from inverter.  3.Disconnect battery from inverter. Wait for 15 minutes for caps to discharge. Reverse procedure but before connecting battery pre-charge inverter before connecting battery. 

Thanks for joining the party. 

It is worth repeating to use a 22 to about 100 ohm resistor or as @TaliaB mentioned recently to charge the battery via a 230V 60/100W filament bulb. 

2 hours ago, GreenFields said:

Is this Shoto not a 0.5C battery? Or have they got a 1C version? Could tell better from a model number.

@GreenFields the model number is SDC10. Please excuse the ignorance, but i have no idea how to set the discharge limits to 50A DC.

I assume it is something here.

1 hour ago, TaliaB said:

@R4nc1dDid your installer do the latest firmware version update if not they need to do firmware update as that sounds like reset relay clicking on and off. EPS is the output voltage of the inverter in islanding and is correct at 230v. Did the installer do a hard reset of the inverter. 1.Switch Eskom power off. 2.Isolate pv from inverter.  3.Disconnect battery from inverter. Wait for 15 minutes for caps to discharge. Reverse procedure but before connecting battery pre-charge inverter before connecting battery. 

@TaliaB, i know the installer did do a firmware update, i will try your suggestion tomorrow, but what would that really do?

I honestly thought this might have just been a setup issue on myside.

As a side note, am i suppose to also set the AC First setting?

17 minutes ago, R4nc1d said:

@GreenFields the model number is SDC10. Please excuse the ignorance, but i have no idea how to set the discharge limits to 50A DC.

I assume it is something here.

I don't know this inverter really, I'm just picking up some possible discrepancies between the spec sheet of the battery, and the settings/readings on thd app. For example, why is the inverter seemingly trying to charge at 53.2V on the app while the battery is supposed to charge at between 54.0-56.4V? Is it trying to charge according to lead-acid settings at 57V as per your image above under charge settings? That's where you'll find the discharge limit setting, below your red circle.

Something maybe for the installer to check. More questions than answers.

 

@GreenFields definitely good questions that i will rely to the installer. But on the Lead Acid note, the battery setting is lithium Ion, so i dont think the Lead Acid setting is applicable.

I can only assume that it is trying to charge at 53.2V because the Charge Type is Set to "According to Battery SOC", I can try changing it to According to Battery Voltage

Would the Generator Charge Start Battery Voltage(V) = 54.0 and the Generator Charge End Battery Voltage(V) = 56.4

 

1 hour ago, R4nc1d said:

As a side note, am i suppose to also set the AC First setting?

 

@GreenFields @TaliaB Thanks for all the help, just to let you know I managed to solve the issue.

I upgraded to a SunSync. 🙂

On 2023/08/21 at 4:14 PM, R4nc1d said:

 

@GreenFields @TaliaB Thanks for all the help, just to let you know I managed to solve the issue.

I upgraded to a SunSync. 🙂

I assume SunSynk inverter and not SunSynk battery?

 

To me it seems as if the inverter may need to be sent back to the distributor for a warranty claim if all settings are correct and it's able to draw sufficient power from PV and/or battery to power the load.