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<p>I've also seen some Outback 15A breakers in combiner boxes just
trip when they shouldn't. Replaced with Midnite and quit having
problems. As others mentioned, going to larger breakers is
usually fine. I usually match the fuse rating for the module
itself. Many are 20A, which gets away from any edge of cloud
stuff too. </p>
<p>Ray Walters<br>
Remote Solar</p>
<div class="moz-cite-prefix">On 5/1/2026 1:55 PM, David Coale via
RE-wrenches wrote:<br>
</div>
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<div>It could be that the breakers are tripping due to the
cloud-edge effect. This happens when you have a sunny day
with a few puffy clouds <span class="ng"
style="border-style:none;background:none">drifting</span>
by. As the clouds start to shade the array, there is a
focusing effect around the cloud that will increase the
sunlight on the array. If the breakers are close to the max
output of the array, then they can trip during these
sunny/cloudy days. Increasing the breakers to the next size
up, if the wiring will handle it, will fix the problem. I
have seen this in a few installations. Changing the breakers
from 10 amps to 15 amps fixed the problem.<br>
</div>
<div><br>
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<div>David</div>
<div><br>
</div>
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<br>
<div class="gmail_quote gmail_quote_container">
<div dir="ltr" class="gmail_attr">On Thu, Apr 30, 2026 at
9:31 PM All Solar via RE-wrenches <<a
href="mailto:re-wrenches@lists.re-wrenches.org"
moz-do-not-send="true" class="moz-txt-link-freetext">re-wrenches@lists.re-wrenches.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">Wrenches,<br>
<div dir="auto">I've got a c client with an Outback PV
combiner with DIN mount CBs. He's let me know a few times
that 9 of 10 , or at least 50%</div>
<div dir="auto">of the breakers are tripping for no apparent
reason. He resets, and all is fine for a few months. </div>
<div dir="auto"><br>
</div>
<div dir="auto">I suspect something is wrong with the array
vs. the breakers needing replaced.<br>
<br>
</div>
<div dir="auto">What should I be looking for and checking? </div>
<div dir="auto"><br>
The client has made sure the breaker screws are tight. </div>
<div dir="auto">
<ul>
<li>Off grid</li>
<li>Pole mounted array</li>
<li>Solarex 110 w Modules</li>
</ul>
</div>
<div dir="auto"><br>
<br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">Regards,</div>
<div dir="auto"><br>
Jeremy Rodriguez</div>
<div dir="auto">All Solar </div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
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