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<p>A 2nd option: A pair of 72 cell modules should be enough.<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 9/12/18 9:21 AM, Mac Lewis wrote:<br>
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<blockquote type="cite"
cite="mid:CAOABG4_3wNk_zKwHp6gTchsiSqkLqgnQ6WkH9YJkF3efdc7p-w@mail.gmail.com">
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<div dir="auto">Hi Bill,
<div dir="auto"><br>
</div>
<div dir="auto">I agree with Allen. We get similar peak temps
here and two 60 cell modules doesn't charge a 48V battery bank
adequately. This effect would become worse over time with
voltage degradation. I try to be at least 15% above highest
expected battery voltage with Vmp of the strings. With 150V
input limit on the Outback controllers, that leaves you with
only one option, strings of 3, with our low temps.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Tue, Sep 11, 2018, 4:24 PM Sindelar Solar <<a
href="mailto:Allan@sindelarsolar.com" moz-do-not-send="true">Allan@sindelarsolar.com</a>>
wrote:<br>
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<p>Bill, I wouldn't, especially with FLAs. I have seen this
situation here, where the summer highs are similar, with a
few homeowner/hack installations and no, 60-cell modules
will not finish the charge in hot weather. Strings of
three work just about perfect with modern charge
controllers, especially in winter, as they range high
enough but well below 150VDC limits.</p>
<p>Allan<br>
</p>
<div class="m_1092409808247784048moz-cite-prefix">On
9/11/2018 4:04 PM, Bill Battagin wrote:<br>
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<blockquote type="cite">
<p>I've been on hold with OB for about 40 minutes now and
I need to know if 2 SW PVs with a Voc of 39.9 and a Vmpp
of 31.3 will do an effective job of charging a 48 volt
LA battery especially with temps of 95 degrees. Anybody
have experience with this or similar, Appreciate the
feedback. It just seems I'm a little low in Vmpp if I
want to equalize when its hot. Will it be even more
questionable in 10 years as PVs age?<br>
</p>
<p>OB did just pickup only to tell me I need Java for the
string sizing tool and he can't help me with this
configuration.</p>
<p>Bill<br>
</p>
-- <br>
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<div class="m_1092409808247784048moz-signature">
<div class="m_1092409808247784048WordSection1">
<p class="MsoNormal" style="line-height:normal"><b><span>Allan
Sindelar</span></b><span><br>
</span><a href="mailto:allan@sindelarsolar.com"
target="_blank" rel="noreferrer"
moz-do-not-send="true"><span>allan@sindelarsolar.com</span></a><span><br>
</span><span>NABCEP Certified PV Installation
Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span>Positive Energy, Inc<span
class="m_1092409808247784048GramE">.</span></span><br>
<b>505 780-2738 cell</b></span><span></span></p>
<p class="MsoNormal"> </p>
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