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<div class="moz-cite-prefix">I started using automotive SAE rated
resettable circuit breakers like these:<br>
<a class="moz-txt-link-freetext" href="http://www.delcity.net/store/Hi!Amp-Surface-Mount-!-%3Cbr%3EManual-Reset-%28Switchable%29/p_193073">http://www.delcity.net/store/Hi!Amp-Surface-Mount-!-%3Cbr%3EManual-Reset-%28Switchable%29/p_193073</a><br>
I'm only using these on smaller stand alone (non NEC) off grid
systems, but they are sealed, and allow protection right at the
battery. Price is decent too.<br>
If used as supplementary protection, (in addition to a listed DC
breaker) the inspector might let you use these, since the
batteries aren't usually UL listed either.<br>
I've seen folks use Class T fuses right at the battery terminal,
which in some ways offers superior protection, but seeing
corrosion eating up around the outside of your expensive fuse is
concerning. <br>
I also agree with Dan on battery box construction, plywood isn't
so good, steel corrodes..... it seems both battery box
construction and OCP at the box for flooded cells is just not
really there.<br>
Plenty of good choices (Outback, Midnite) for sealed batteries.<br>
We really could use a battery that had integrated OCP that was
sealed against corrosion. It could just be a class T fuse with an
anti -corrosive seal with a holder integrated into the positive
terminal. (the things I dream of at night....)<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>
On 2/7/2014 10:26 AM, Dan Fink wrote:<br>
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cite="mid:CAF+3LndifSLX=Vn3O-KCZLcTzNE_ibrR0BbtWP=pWy16o5PczQ@mail.gmail.com"
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<div dir="ltr">Does anyone have any elegant solutions to this?
It's really time consuming and ugly to run big parallel battery
string wires *out* of the battery enclosure to class T fuses,
then back into the battery box. It looks very ugly and DIY, and
in conduit adds a few hundred to the install cost just for
labor. The Class T fuses and blocks themselves are not
particularly expensive.
<div>
I have been recommending parallel fusing on battery banks of
2x8 L16s and over now, after a nearly tragic incident with a
bad cell that shorted. The (perfectly legal) wooden battery
box made the fire much worse. A pet peeve of mine. </div>
<div><br>
<div class="gmail_extra"><br clear="all">
<div>Dan Fink,<br>
Executive Director;<br>
Otherpower<br>
Buckville Energy Consulting<br>
Buckville Publications LLC<br>
NABCEP / IREC accredited Continuing Education Providers<br>
970.672.4342<br>
<br>
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