Growatt 5000ES - Cant set Low DC cut-off voltage

[Olasitu]

Dear all,

My Low DC cut-off voltage is resetting and allowing only 42 V. This is a new situation. So not sure what is going on. The settings for the key parameters are:

1 Output source priority: To configure load power source priority– SUB
2 Maximum charging current: – 80A
5 Battery type – USE not USE2
11 Maximum utility charging current – 30A
14 Charger source priority: To configure charger source priority– SNU
19 C.V. charging voltage. – 56.4V
20 Floating charging voltage – 54V
21 – Low DC cut-off voltage 42V

#21 can be set to 47V if #5 is changed from USE. But I had successfully used USE and 42V as Low DC cut off.
I would really appreciate some feedback from people using USE and have Low DC cut off set to their preferred voltage please share your parameters. I believe USE has been the recommended setting for Battery Type for Growatt not using non BMS batteries.

My installation:
I have 2 Growatt 5000 ES installed in Parallel with 2 x Blue Carbon 48V 200Ah Lithium Battery Pack For Solar Home System. PVs are Mono 10 x 550W. 5 panels each in series to each Inverter. Priority is set to Solar, Utility and Battery.

 

[timselectric]

Setting #21 must be lower than #12. Have you recently lowered #12?

 

[Olasitu]

Setting #21 must be lower than #12. Have you recently lower

 

[Olasitu]

@

Setting #21 must be lower than #12. Have you recently lowered #12?

@timselectric thank you again. Yes. It worked ! I set 12 to 48 and it accepted 46V for 21. I didnt think it was relevant to the other parameters. Do I need to adjust 13?

 

[timselectric]

@

@timselectric thank you again. Yes. It worked ! I set 12 to 48 and it accepted 46V for 21. I didnt think it was relevant to the other parameters. Do I need to adjust 13?

No, it should be fine. Whatever you want it at.

 

[Pink]

No, it should be fine. Whatever you want it at.

I wanted to do same: I wanted to set 21 to 47v so I found this info and tried to change 12 to 48 but it resetting and allowing only 46 V.Any ideas why?
1 Output source priority – SBU
5 Battery type – USE
19 C.V. charging voltage. – 55V
20 Floating charging voltage – 54V

I charge only from Solar No Ac In to inverter.

Pink

 

[timselectric]

I wanted to do same: I wanted to set 21 to 47v so I found this info and tried to change 12 to 48 but it resetting and allowing only 46 V.Any ideas why?
1 Output source priority – SBU
5 Battery type – USE
19 C.V. charging voltage. – 55V
20 Floating charging voltage – 54V

I charge only from Solar No Ac In to inverter.

Pink

It should work, as long as #21 is set lower first.
Maybe reboot it. (Power off and back on)

 

[Pink]

It should work, as long as #21 is set lower first.
Maybe reboot it. (Power off and back on)

It was working when i did on OFF-Mode so now its ok. I have 2 inverters in parallel i dont know if that was part of why i could not do in normal mode. Thanks for sharing your knowledge.

Pink