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Old 17-12-2013, 08:46   #1
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Proper Charging Question 24v

This is from Interstate's website. 8 batteries into a 24v bank. Does this appear to be correct? U2500HC


Nominal Battery Voltage Charging Current Bulk Charge Voltage (2.4 VPC) Absorption Voltage (2.58 VPC) Absorption Time in Hours Float Voltage (2.2 VPC) Equalization Voltage (2.6 VPC) Equalization Time in Hours

12 Volts (6 cells) C/10 14.4 15.5 2 to 4 13.2 15.6 2
24 Volts (12 cells) c/10 28.8 30.96 2 to 4 26.4 31.2 2

Hard to read with cut and paste. Bulk 28.8, Absorption 30.96, float 26.4, equalize 31.2
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Old 17-12-2013, 08:54   #2
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Re: Proper charging question 24v

One of the better charging voltage suggestions is included in Balmar's alternator regulator manuals. You can download them from Balmar DC Power Products.

Just double the 12V recommendations.

Bulk voltage should be higher than absorption voltages.
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Old 17-12-2013, 09:43   #3
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Quote:
Originally Posted by Stu Jackson View Post

Bulk voltage should be higher than absorption voltages.
Huh ?????

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Old 17-12-2013, 23:11   #4
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Re: Proper charging question 24v

no something is wrong. I think the bulk and absorb are switched.

though the 30v seems why to high. maybe a typo. 28.8v bulk and something lower for absorb.
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Old 18-12-2013, 04:29   #5
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no something is wrong. I think the bulk and absorb are switched.

though the 30v seems why to high. maybe a typo. 28.8v bulk and something lower for absorb.
You can't control bulk voltage , merely the transistion voltage into absorption mode. ( and that only if you've a big enough charger )

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Old 18-12-2013, 05:15   #6
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Re: Proper Charging Question 24v

Quote:
Originally Posted by goboatingnow View Post
You can't control bulk voltage , merely the transistion voltage into absorption mode. ( and that only if you've a big enough charger )

Dave
Yes, I've never understood why Bulk and Absorb voltages are ever different.
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