<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Try looking at the New Midnite Kid, allows for two parallel charge controllers off the same input.<div> I too have systems that I use 2 CCs for alarm systems pull the 2nd CC "PV source input" from the 48 VBB and charge the 24 VBB. disable MPPT<div>I will also agree RU outta of yer mind? Yep the SW 4024s were.... that is were!, work horses but not to many around. can you say a ticking Tbomb if this is powering a load in some remote place w/ hi customer expectations<br><div><div><div>On Mar 25, 2015, at 1:24 PM, Ray Walters wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
<meta content="text/html; charset=windows-1252" http-equiv="Content-Type">
<div bgcolor="#FFFFFF" text="#000000">
Hi Jeremy;<br>
<br>
I usually would combine both buildings all into one system, KISS
principle, and also less cost. Later when those batteries die,
replace with a properly sized bank. I also wouldn't be building a
new system around an SW4024, those are getting really dated. Great
inverter, but they don't last forever. They have excellent resell
value on Ebay for folks that need replacements in dual and quad
systems.<br>
Having said that, Jerry's idea of 2 controllers on one array sounds
like it would work, but not with Blue Sky because of the grounding
as Larry mentioned.<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
<div class="moz-cite-prefix">On 3/25/2015 10:36 AM, Larry wrote:<br>
</div>
<blockquote cite="mid:5512E421.3080808@starlightsolar.com" type="cite">
<meta content="text/html; charset=windows-1252" http-equiv="Content-Type">
Keep in mind that the Midnite controller has a combined PV and
bat. negative and the Blue Sky requires isolated PV and bat.
negative.<br>
<pre class="moz-signature" cols="72">Larry Crutcher
Starlight Solar Power Systems
</pre>
<div class="moz-cite-prefix">On 3/24/15 6:11 PM, Jeremy Rodriguez
wrote:<br>
</div>
<blockquote cite="mid:BAY405-EAS3299EF04E2EC8D56D4AE5BCCB0B0@phx.gbl" type="cite">
<meta http-equiv="content-type" content="text/html;
charset=windows-1252">
<div>The thought was to charge the batteries for a new building
utilizing an SW4024 with new classic controller and new L A
batteries, and once those batteries are charged send the PV to
the house system which is the 48v setup with dual outback
inverters and dual SB3048 CCs. Lead acid batteries as well. 3
years old </div>
<div>I've never had this come up in 16 years!</div>
<div><br>
<br>
Jeremy Rodriguez
<div>All Solar, Inc.
<div>1463 M<br>
<div>Penrose Colorado 81240</div>
<div><br>
</div>
<div>Sent by Jeremy's iPhone. Sorry for typos and
shorthand!</div>
</div>
</div>
</div>
<div><br>
On Mar 24, 2015, at 5:31 PM, "Ray Walters" <<a moz-do-not-send="true" href="mailto:ray@solarray.com">ray@solarray.com</a>>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div>
<meta content="text/html; charset=windows-1252" http-equiv="Content-Type">
What's the reasoning behind two different battery banks at
different voltages? What is the other equipment involved:
batteries type, age, inverters, etc.?<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
<div class="moz-cite-prefix">On 3/24/2015 5:07 PM, Jeremy
Rodriguez wrote:<br>
</div>
<blockquote cite="mid:BAY180-W71FA95B8A87E7477EB3A9ACB0A0@phx.gbl" type="cite">
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<div dir="ltr">It would be 2kw of PV<br>
<br>
Jeremy<br>
All Solar<br>
Penrose, CO<br>
<br>
<div>
<hr id="stopSpelling">Date: Tue, 24 Mar 2015 12:17:20
-1000<br>
From: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:jerrysgarage01@gmail.com">jerrysgarage01@gmail.com</a><br>
To: <a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a><br>
Subject: Re: [RE-wrenches] Charging Multiple Battery
Banks<br>
<br>
<div dir="ltr">
<div>How big of a system are you looking at as some
of the smaller charge controllers are auto sensing<br>
</div>
Jerry<br>
</div>
<div class="ecxgmail_extra"><br>
<div class="ecxgmail_quote">On Tue, Mar 24, 2015 at
12:11 PM, Jeremy Rodriguez <span dir="ltr"><<a moz-do-not-send="true" href="mailto:allsolarjeremy@msn.com" target="_blank">allsolarjeremy@msn.com</a>></span>
wrote:<br>
<blockquote class="ecxgmail_quote" style="border-left:1px #ccc
solid;padding-left:1ex;">
<div>
<div dir="ltr">Wrenches,<br>
I have a client that wants to charge a 24v
battery bank and a 48v bank with the same
array. Different charge controllers, with
some type of relay is what I was thinking,
and using the controller's aux. 12v output
for the relay control. <br>
The primary battery to be charged would be
the 24v bank, then once it is fully charged,
divert the pv to the secondary controller at
the 48v bank.<br>
<br>
Any comments or recommendations on this
would be helpful.<span class="ecxHOEnZb"><font color="#888888"><br>
<br>
Jeremy Rodriguez<br>
All Solar Inc. <br>
Penrose, CO<br>
</font></span></div>
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