<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">Allan@sindelarsolar.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<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>
</div>
<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>
</blockquote>
<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"><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><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
</div>
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