Another advantage of 24v over 48v is when you have loads that are more
appropriate at 24v , like DC circulation pumps on solar heating systems,
The Elsid, Laing and Hartel circ pumps don't come in 48v and the
Flowlight booster pump 48volt version is too noisy if the pump will live
in a utility room attached to the house. I live with a 48v system and I
ended up adding a Solar converters transformer to knock all my DC loads
down to 24volt, I had to add a capacitor to the transformer to handle
the starting surge of the Flowlight, kinda funky and I wouldn't do that
on a clients system. I usually stick with 24volt battery banks for these
reasons.
Carl Hansen
Hansen&Sun Elect.
On 1/17/2012 11:38 AM, R Ray Walters wrote:
The only advantages of 24 v are that you can create smaller KWH battery banks,
and that Bergey's XL.1 was only available in 24 v.
Anytime the design allows, I jump to 48 v.
R. Walters
r...@solarray.com
Solar Engineer
On Jan 17, 2012, at 11:11 AM, Nathan Jones wrote:
Mark,
It would seem to be a wash. As the voltage is halved the amperage is doubled in
the battery bank. This would seem to require doubling the charging amperage so
nothing is gained. On a system of any size the 48 volt gets the default nod
here. Charge controllers handle twice the solar. Parallel battery strings are
eliminated, or at least held to two. Wire sizing might be reduced on the low
voltage side of things. And much easier future expansion possibilities, too.
Cheers,
Nathan Jones
Power Source Solar Inc
------------------------------
On Tue, Jan 17, 2012 10:56 AM CST Mark Frye wrote:
Not really on topic to Jay's question, but...
Is 48v always better than 24v?
How important is bulk charging current to overall battery life?
In some cases, isn't it better to use a 24v inverter/charger which can
develop a higher charge current for a battery bank that has a higher AH
rating?
Mark Frye
Berkeley Solar Electric Systems
303 Redbud Way
Nevada City, CA 95959
(530) 401-8024
www.berkeleysolar.com
-----Original Message-----
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz
Sent: Tuesday, January 17, 2012 8:43 AM
To: RE-wrenches
Subject: [RE-wrenches] battery buss bars
Hi All,
Where do I find buss bars for a battery parallel problem?
I've got to fix a brand new ( not me) system, that has 4 sets of L-16's at
24v.
Yea yea why didn't they go to 48?
So I want to use buss bars to parallel them, and looking for premade ones.
Thanks in advance,
Jay
Peltz power
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