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<p>I recently contacted SMA about their requirement that if the LI+
battery isn't on their list, that we must use Lead acid. I
consider that to be a really poor answer; just because they
haven't tested it, we should not be forced to use a much worse
alternative. Yes, they would prefer to have all their tech
communicate with the battery tech, but telling us to use lead
acid, that has no communications available at all is the answer?
Lead and Sulfuric acid that off gases deadly H2S, with no internal
BMS at all, inefficient overall performance, and short life is
preferred ??!<br>
</p>
<p>On top of that, SMA has no one that can even answer questions on
the Sunny Island systems at all. Tech support can't or won't
answer any of our questions. Repeated emails to Heiko Stieber
(apparently the only one there that knows) have gone unanswered.
We are in the middle of a large 4 system project, that would have
used 15 Sunny Island inverters, but we had to switch to Schneider,
because of the utter lack of technical support for battery based
systems from SMA. We were also considering the Tripower Storage
60, but it is only available in Europe, and once again, we can't
get any support or info on that product either. <br>
</p>
<p>My decision process works like this: if you can't answer tech
questions in the design phase, where are we going to be when we're
trouble shooting this equipment in some remote location later?</p>
<p>Answer: SMA is not a viable option at this time.</p>
<p>Too bad, I've been installing their equipment for almost 20
years, they were our first choice too....</p>
<p>And back to Carl's question: most of the batteries on SMA's
approved list aren't even available in the US......so no, we don't
have experience with them.</p>
<p>Rant off,<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 1/7/20 12:08 PM, Carl Adams wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAHEKrCSHUZ-GxqND7XNwz=KW8mh6kVe-c=ny94tEYnkWoijrdA@mail.gmail.com">
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<div dir="ltr">Hello Wrenches,
<div>I have a SI 5048 system installed in 2012 with Concorde
PVX-4050HT AGM battery bank. The system has shut down a
couple of times with low battery voltage and it seems the
batteries may be on their way out. There are some signs of
seepage on a couple of these sealed batteries. A few pictures
attached. </div>
<div><br>
</div>
<div>System owner would like to consider a Lithium Ion
replacement. SMA provided the attached list of
compatible batteries. Can any of you provide your experience
with these batteries or others which could work for this
application?</div>
<div><br>
</div>
<div>With Kind Regards</div>
<div>Carl Adams</div>
<div>SunRock Solar</div>
</div>
<br>
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