[RE-wrenches] 24 vs. 48

[bob ellison]

It only looks like a higher current, the actual power into the bank is the
same.
100 amps @ 12 volt is the same as 50 amps @ 24 volts and 25 amps @ 48 volts.

Bob Ellison

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Mark Frye
Sent: Tuesday, January 17, 2012 12:20 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] 24 vs. 48

OK,

But let's assume only one string, how important is it to develop a higher
bulk charge current?
 
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City,  CA 95959
(530) 401-8024
www.berkeleysolar.com 

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kent
Osterberg
Sent: Tuesday, January 17, 2012 9:16 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] 24 vs. 48

Mark,

A 24-volt inverter may produce twice as much charging current as a 48-volt
inverter with the same power rating, but if you are putting batteries in
parallel, the individual batteries get the same charging current either way.
In the case of four parallel strings of four L16 batteries, a 100-amp
24-volt charge puts about 25 amps (if you are careful with the wiring and
the batteries aren't sulfated) into each string of batteries. A 50-amp
48-volt charger would accomplish the same thing.

Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com
t: 541-568-4882

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