What Sell Voltage setting for Grid-Tie 24v Battery Bank

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What Sell Voltage setting for Grid-Tie 24v Battery Bank

Postby foo on Thu May 18, 2017 9:12 am

VFXR3524A Inverter
24V Battery Bank @ 210AH
Mate3

Do I set the sell point at the 100% Full rating for the batteries which is 25.2V
or at the Float Voltage rating of the batteries which is 27.2V?

Thanks in advance.
foo
OutBack Whiz
 
Posts: 28
Joined: Thu Jun 30, 2016 1:25 pm
My RE system: VFXR3524A Inverter
2.2kW Solar Array
24V Battery Bank - 210AH (4x105AH @12V) -FLA
Mate3
Renogy Tracer 4210 40 Amp MPPT Charge Controllers x 3, 12/24V 100VDC Input

Re: What Sell Voltage setting for Grid-Tie 24v Battery Bank

Postby Sandra Herrera on Fri May 19, 2017 3:13 pm

What type of batteries? Why is float voltage so high?
Usually SELL voltage depend on the type batteries and the application, a good rule of thumb used in the industry is float voltage.
I would recommend you check with battery manufacturer on your float voltage
Sandra Herrera
Applications Engineering


OutBack Power Technologies
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Sandra Herrera
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Re: What Sell Voltage setting for Grid-Tie 24v Battery Bank

Postby foo on Fri May 19, 2017 5:15 pm

FLA

Thank you for making me double check that. I thought I had grabbed that off of the pdf but it seems I grabbed it off a scale I found long ago on the net.

I will promptly change the float voltage; but I do have a question:
How do I know which voltage in the range specified is right for my bank?
http://www2.exide.com/Media/files/Location%20Data/Battery%20Charging%20%26%20Storage%20Specs%20%2011_13_15.pdf

The range is 26.4V to 26.8V
What I will set for right now is 26.8V for float and 26.4V for Sell.

Thanks again for the catch.
foo
OutBack Whiz
 
Posts: 28
Joined: Thu Jun 30, 2016 1:25 pm
My RE system: VFXR3524A Inverter
2.2kW Solar Array
24V Battery Bank - 210AH (4x105AH @12V) -FLA
Mate3
Renogy Tracer 4210 40 Amp MPPT Charge Controllers x 3, 12/24V 100VDC Input


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