Axpert inverter not returning to grid

[Pieter Jooste]

Good day.

I have a 2 x 5kW MKS setup in parallel with 2x5.2kWh Blue Nova bats with the following settings:

Float 54
Back to battery 54.5
Bulk 55
low voltage alarm 49
back to grid 50
equalize 55.5

low voltage cut off 48

It is running on SBU, but the system does not go back to grid when bats are on 50V they keep getting lower until they reach cut off. Any idea what setting is wrong?

[Barryv]

56 minutes ago, Pieter Jooste said:

Good day.

I have a 2 x 5kW MKS setup in parallel with 2x5.2kWh Blue Nova bats with the following settings:

Float 54
Back to battery 54.5
Bulk 55
low voltage alarm 49
back to grid 50
equalize 55.5

low voltage cut off 48

It is running on SBU, but the system does not go back to grid when bats are on 50V they keep getting lower until they reach cut off. Any idea what setting is wrong?

What is setting #12 set on?

[Pieter Jooste]

50V

[Barryv]

are your batteries BMS connect to the inverter?

[Pieter Jooste]

No, but tell me, will it make a difference? If the return to grid setting is set to 50V on volt based inverter like the MKS, should it not be enough for the bat to just switch back. The low voltage alarm comes on at 49V, thus it works, should the switch back to grid not react in the same way?

[Krokkedil]

are you running any software like ICC.

the software will take charge over the inverter settings. 

 

[Barryv]

yes, ICC will help. Your inverter can't read the SOC of the Blue Nova Batteries. 

[Pieter Jooste]

No software.

[Pieter Jooste]

Barry, I will tell them to connect the comms. However, can you explain then why it will read the low voltage and activate the alarm but not the back to grid function