Jump to content

Sun pays axpert 5kva-48vdc issues


Wildebees
 Share

Recommended Posts

Hi, you all. i have installed the axpert a few times but man am i struggling with getting the batteries charged. OK so the system is 2x 4kw axperts connected to 1500ah 2v Traction cells (used) the main array is split between the 2 inverters at about 50 amps each charging current. then i have a separate array on a microcare 60amp mppt.  on the standard settings i can only equalize to 58,4v, but on the microcare i go to 62v odd... i like the higher voltage as i do get beteer sg readings. but now the inverters keep tripping on an error code 03. is there any way around this? will the firmware upgrade help?kind regards.

Link to comment
Share on other sites

12 hours ago, Wildebees said:

on the standard settings i can only equalize to 58,4v,

So yours is not a 64 V model. So if this was a real Axpert (I believe that the Sun Pays are actually clones), the high DC cutoff voltage would be 60.0 V.

12 hours ago, Wildebees said:

on the microcare i go to 62v odd... i like the higher voltage as i do get beteer sg readings. but now the inverters keep tripping on an error code 03.

Fault code 03 is "Battery voltage is too high". This will likely happen at around 60.0 V (as measured by the inverter). Though in older Axpert firmware, it looks like it might be at 4.0 V above setting 26 (absorb/CV battery voltage setting), whichever is higher.

13 hours ago, Wildebees said:

is there any way around this?

I can't see any safe way. The inverter isn't designed for operating at more that 60.0 V, and your battery seems to need the higher voltage. Swapping to a 64 V model would help, but obviously that's a big step.

13 hours ago, Wildebees said:

will the firmware upgrade help?

This isn't something that a firmware update can help (the MOSFETs still break down at 75 V or whatever, and there are always spikes on the battery voltage when they switch). Also, since it's probably a clone, it's unclear what firmware you would need, and whether Voltronic Power firmware would work.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...