Charge paramters for Hawker FLA Batteries

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Charge paramters for Hawker FLA Batteries

Postby cgerke on Thu Mar 14, 2019 6:13 am

I am helping a friend setup a Radian system with FM80s CC, FNDC, Mate3s. He has Hawker FLA 2 Volt Batteries that are about 3 years old. I can not find what I consider reliable charging info. Currently, I have the CC set as follows: Absorb - 59V, 3 hours ; Float - 53.8, Eq. - 61 volts, 2 hours. The 8048 inverter is set slightly lower in volts. Any comments or guidance is appreciated.
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Re: Charge paramters for Hawker FLA Batteries

Postby Kurt Lundquist on Thu Mar 14, 2019 7:47 am

Does the battery have a label that shows the model number? Sometimes the label has charging info but typically it is in volts per cell (Vpc) and it isn't always geared around a cycling application.

What is the size of the battery bank?

How much power does he have for charging?

The initial settings you posted seem ok but I would maybe bump Absorb up to 4 hours. Keep an eye on water consumption and specific gravities to help guide future tweaks to the charge parameters.

-Kurt
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Re: Charge paramters for Hawker FLA Batteries

Postby cgerke on Thu Mar 14, 2019 10:21 am

The only markings I can find are heat stamped on the top of the battery : "N28BJ" but nothing Googles. The size of the battery indicates that it is in the 600 AH range (just guessing) . The system has 48 batteries in 2 banks of 24, so 1200AH at 48Volts. The system has 3 Flexmax 80s with 27 ea x 305 watt panels (8200 watts approx). The system is "Laguna". You recently replied to a different post concerning "Bypass Mode". I will adjust the Absorb. parameters accordingly. Thanks for the help.
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Re: Charge paramters for Hawker FLA Batteries

Postby mjnolls on Sun May 05, 2019 9:08 pm

I found a sheet at homepower.com. It's titled Battery Guide and the Hawkers are on page 83.
Per cell: Bulk Charge Set Point is 2.45 Volts per Cell.
Float Charge Set Point is 2.25 Volts per Cell.
Equalize Charge Set Point is 2.55 Volts per Cell.
These are the same for all models listed.
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Re: Charge paramters for Hawker FLA Batteries

Postby bluespur on Tue May 07, 2019 5:17 pm

Matches what I have set for my Hawkers
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