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36 volt inverter

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(@steve-gomes)
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Joined: 2 years ago
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I bought a 36 volt and i can only get the nominal up to 31 volts. I'm guessing that the software is set up for 24 volt . Can you log in and change it. Thanks Steve Gomes and Steve Severin. 


   
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(@sid-genetry-solar)
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Posted by: @steve-gomes

I bought a 36 volt and i can only get the nominal up to 31 volts. I'm guessing that the software is set up for 24 volt . Can you log in and change it. Thanks Steve Gomes and Steve Severin. 

Unfortunately, there is no "back door" access to GS inverters, and definitely no critical setup functionality exposed Internet-wise.

Can you provide photos or at least the text of the following two things on the inverter screen?

  • STAT screen -> top line.  Should indicate the voltage in the given part number (i.e. -12-, -24-, -36-, -48-).
  • If it's indicating 24v in the STAT page, see if you can power the inverter on 24v so it'll run (i.e. not shut off with error).  Then go to the Diagnostic Info page (OUT -> press Enter -> down 3x to "Diags" -> press Enter) -> scroll all the way to the very bottom of the Diagnostic Info page.  What's "Xformer Volt" read?
    • ~16vAC = transformer wired for 24v.
    • ~24vAC = transformer wired for 36v.

There's a hardware transformer setup that differs on each configured voltage--so simply changing the software side to 36v without changing the transformer setup will cause problems.

It's entirely possible a mistake happened during the inverter build process--but we need to triage the situation first to find out what happened!

 


   
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(@steve-gomes)
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@sid-genetry-solar 

image
image

is this what you need?

Steve G


   
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(@steve-gomes)
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@sid-genetry-solar 

image
image

I think you meant this.... right?

Steve G


   
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(@sid-genetry-solar)
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Posted by: @steve-gomes

@sid-genetry-solar 

image
image

I think you meant this.... right?

Steve G

Almost...close!  Interesting that it's running 1.1r6--this is evidently an older unit?

I need the Diagnostic Info page...Xformer Volt line.

 


   
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(@sid-genetry-solar)
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Posts: 2884
 
image

here's a screenshot from a test bench inverter showing the "Xfrmr In" line--that's what I want to check on yours.  (Note here that it's 33.488vAC; ~32vAC = 48v config.)


   
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(@steve-gomes)
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@sid-genetry-solar 

here is mine

image

   
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(@sid-genetry-solar)
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Posted by: @steve-gomes

@sid-genetry-solar 

here is mine

image

LOL funny--like I noted above, the inverter needs to be running!  In battery mode.  Xfrmr In being 0v doesn't tell anything.

 


   
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(@steve-gomes)
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@sid-genetry-solar 

ok an update

thumbnail

   
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(@sid-genetry-solar)
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OK, so the inverter was completely set up for 24v operation...software config matches hardware setup.

It can be (hardware) rewired and (software) reconfigured for 36v operation; fans will need replaced, as the current ones are only rated to 40vDC max.


   
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(@steve-gomes)
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@sid-genetry-solar 

oh no!  so do i need to send it back to you?  we just received your 12000 W 36V last week...if I can find someone to help me install it..... so I need to send the 6000w back?


   
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(@sid-genetry-solar)
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Posted by: @steve-gomes

so I need to send the 6000w back?

Depends how adventurous and how electrically savvy you are.  Apart from the fans (which we can send), the inverter technically can be reconfigured in the field.  I'm more than happy to help via video call if necessary--but we do need a decent level of electrical know-how first ;-).

Basically we just need to reconfigure the transformer primaries to a different voltage.  Then void the software warranty -> change the system setup.

 

Of course we can reconfigure it for you if that's a better option.


   
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(@steve-gomes)
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my question now is can we continue to use it or shut it down for now?  this might be the reason that is overheated a couple of times...???

Steve G


   
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(@sid-genetry-solar)
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Posted by: @steve-gomes

I bought a 36 volt and i can only get the nominal up to 31 volts. I'm guessing that the software is set up for 24 volt .

I've confirmed with Sean that the inverter in question was indeed purchased as a 24v--so it was delivered as ordered.  I'm not sure what you're trying to get at by saying otherwise.  (Maybe that you've purchased a 36v 12kw...even though that's not the inverter in question here.)

Posted by: @steve-gomes

my question now is can we continue to use it or shut it down for now?  this might be the reason that is overheated a couple of times...???

There's a lot of factors that can influence or result in an overheat.  High DC voltage relative to the transformer config is definitely a possibility, as it'll stress the FETs considerably harder than necessary.  Other potential factors include the shutdown temp thresholds, internal dust buildup, ambient temperatures, and available ventilation.


   
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(@steve-gomes)
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@sid-genetry-solar 

image

here is my order and confirmation number.


   
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