Easun 6048 charge controller not saving battery voltage settings - always going back to 12v

[opendocumentary]

Hi maybe somebody had the same problem and could help me.

I have 2 Easun 6048 charge controller that where working fine before but now I can not save the battery voltage setting on them.
All the other setting get changed but voltage goes always back to 12v and then I get the error that the battery voltage is to high because I run a 48V system.
Have tried different battery settings ... user, gel, li, ... always saving 48V and/or AUTO but the battery voltage will always go back to 12v system.

Cheers,
Christian

 

[Mattb4]

Type of battery and is it 1-48vDC battery or is it 4-12vDC batteries wired in series?

 

[opendocumentary]

It is a 48V LiFePO4 DC System (3x Pylontech US5000 48V 4,8kwh] ... I have multiple other charge controller that charge the system and I am offgrid.
The Easun 6048 did also run in this system before but I changed them with other charge controller and have not used the Easun 6048 for a bit.
But now I need to add another solar array to the system and it just always falls back to 12v. I always put in 48V or AUTO but it just does not save that setting. All other setting I can change.

Cheers,
Christian

 

[Mattb4]

It could be faulty than. I found on some SCC the logic on them gets confused and if I set it to LA for a bit and than back to Lithium it clears up. You could also try using a different voltage battery and see if it works before trying the 48vDC ones. If none of that helps, not much you can do but see if any Warranty applies.

 

[Tadsher]

Instead of setting the voltage to 24 volts can you set it to auto select?

 

[opendocumentary]

Maybe the solar charge controller is damaged.

Today it was sunny and it was connected to 3x280W Solar giving out 110V at the SCC.
Connected to a 12V 200Ah GEL Battery. Set to AUTO but also switched back to 12V.

The SCC was switching between the Mode 3 (night, not charging) and 4 (MPPT) with 0 Error and giving out 0A to the Battery.

Has somebody maybe another idea or knows what could be damaged?
I ordered a new MPPT SCC but still would like to fix it because I have 2 of the Easun 6048.
When there where working there did a really good job.

Cheers,
Christian

 

[Mattb4]

Maybe the solar charge controller is damaged.

Today it was sunny and it was connected to 3x280W Solar giving out 110V at the SCC.
Connected to a 12V 200Ah GEL Battery. Set to AUTO but also switched back to 12V.

The SCC was switching between the Mode 3 (night, not charging) and 4 (MPPT) with 0 Error and giving out 0A to the Battery.

...

What are the SCC's max Voc ratings? If you exceed it (even for a brief time) than damage can occur.

*Helps to also tell us the PV Voc numbers and not the voltage you are seeing at the SCC.

 

[opendocumentary]

SCC Voc 180V
PV Voc 39,4V per Panel (total for 3: 118,2V)

Cheers