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How can I reduce charge voltage below 25.6v on a 24v Victron Blue Smart Charger?

SteveDeFacto said:
That would be amazing! If the 24v IP43 doesn't let you set a lower voltage than 25.6v, would you be able to test one of those Skylla IP63 chargers as well?
Click to expand...
I don't stock the Skylla chargers, and have never even had a request for one :ROFLMAO: - I think for the price an inverter/charger is a better buy - obviously missing the point that some of them have very large output capacity even with strange input voltages.
 
sunshine_eggo said:
IP22: Demo library won't let me set below 25.6.

Have you tried power supply mode? It allowed me to set voltage as low as 24.0V.

With NCM/NCA, absorption is effectively meaningless. Only a float voltage is needed as current will drop to zero.
Click to expand...
Are you doing this in the demo library? I tried power supply mode on the ip22 and it also restricted it to 25.6v.

Though you got me thinking, what if I fed the output of the power supply mode into my MPPT solar charge controller? 🤔
 
SteveDeFacto said:
Are you doing this in the demo library? I tried power supply mode on the ip22 and it also restricted it to 25.6v.

Though you got me thinking, what if I fed the output of the power supply mode into my MPPT solar charge controller? 🤔
Click to expand...

Yeah. Demo library is supposed to represent all setting. Important that device and VC are fully updated.

Feed to MPPT: that works.

I powered my 100/30 with a 30V/10A supply. Very common practice.
 
SteveDeFacto said:
Are you doing this in the demo library? I tried power supply mode on the ip22 and it also restricted it to 25.6v.

Though you got me thinking, what if I fed the output of the power supply mode into my MPPT solar charge controller? 🤔
Click to expand...
Yeah I tried on my 24/16 and same problem, the demo library is providing lies for min voltage in power supply mode. Not sure where that bug report goes.
 
SteveDeFacto said:
That would be amazing! If the 24v IP43 doesn't let you set a lower voltage than 25.6v, would you be able to test one of those Skylla IP63 chargers as well?
Click to expand...
After running a test on one of our in-house units the lowest you can set it to is the 25.6v. In power supply mode you can set the output voltage lower at 24v. But as it stands right now the Victron Blue Smart Charger cannot set absorption or storage lower than 25.6v.
 
Tree_Watcher said:
After running a test on one of our in-house units the lowest you can set it to is the 25.6v. In power supply mode you can set the output voltage lower at 24v. But as it stands right now the Victron Blue Smart Charger cannot set absorption or storage lower than 25.6v.
Click to expand...
No idea what you are doing that lets you set the voltage lower than 25.6v in power supply mode?
Screenshot_20240610_093017.jpg
 
Tree_Watcher said:
After running a test on one of our in-house units the lowest you can set it to is the 25.6v. In power supply mode you can set the output voltage lower at 24v. But as it stands right now the Victron Blue Smart Charger cannot set absorption or storage lower than 25.6v.
Click to expand...

Confirming this is in reference to the IP43?

I'm very pleased to know that @Tree_Watcher is part of Team "Doesn't Suck"!!! 😁
 
My gut says that Victron thinks the IP22 SHOULD work at 24V in power supply mode as a 24V charger working in power supply mode SHOULD work at 24V since... it's a 24V power supply at that point.

Hopefully, the bug report may yield a firmware update making the IP22 capable of 24V in a fixed power supply mode.
 
sunshine_eggo said:
My gut says that Victron thinks the IP22 SHOULD work at 24V in power supply mode as a 24V charger working in power supply mode SHOULD work at 24V since... it's a 24V power supply at that point.

Hopefully, the bug report may yield a firmware update making the IP22 capable of 24V in a fixed power supply mode.
Click to expand...
Let me check what my 12/30 drops down to in power supply mode....
 
Same behavior on the 12/30, anything under 12.8V for power supply mode is overwritten, while demo mode suggest 12V should be possible.
Screenshot_20240610_124845.jpg
 
sunshine_eggo said:
Confirming this is in reference to the IP43?

I'm very pleased to know that @Tree_Watcher is part of Team "Doesn't Suck"!!! 😁
Click to expand...
Yes, this was the IP43 version, the IP22 version could not be set any lower than the 25.6v. I should have clarified in my original post! We are still doing further testing with some of the other chargers to see if this is an issue with just the 24V so we can let customers know when looking at these chargers!
 
Tree_Watcher said:
Yes, this was the IP43 version, the IP22 version could not be set any lower than the 25.6v. I should have clarified in my original post! We are still doing further testing with some of the other chargers to see if this is an issue with just the 24V so we can let customers know when looking at these chargers!
Click to expand...

1718039895853.png

@HighTechLab - you must rub off on people, or you just have an eye for good ones. :p
 
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