[RE-wrenches] 60 Amp PV breaker tripping

jay jay.peltz at gmail.com
Tue Apr 19 17:35:40 PDT 2016


I’d put my money on the batteries are getting really bad.  
The easiest “fix” is to put say 10’ of #6 between the CC and the battery connection.  It will probably keep the surge down to below the CC breaker trip point.
boB at midnite suggests you actually wire it to the battery and not the main battery buss in the XW box.  The reason is for more wire, to help dampen the surge that is put onto the CC
Hope this helps

jay

peltz power
> On Apr 19, 2016, at 12:15 PM, Kristopher Schmid <solman at legacysolar.com> wrote:
> 
> No recent changes, Jay.  System has been installed since 2009.
> 16 Kyocera KD180
> Wattsun tracker
> Xantrex XW4548
> Xantrex XW MPPT60-150
> 24 L16s (very tired but surviving)
> 
> Could the old batteries cause the CC to pull too much PV current?  Even at 1.25 times the Isc of my strings, i should only be pulling 41.75A maximum.
> 
> On Tue, Apr 19, 2016 at 12:03 PM, Jay <jay.peltz at gmail.com <mailto:jay.peltz at gmail.com>> wrote:
> Is this a new or old problem 
> And any changes ( equipment etc)just before the problem started?  
> 
> Jay
> Peltz power 
> 
> Sent from my iPhone
> 
> On Apr 19, 2016, at 9:04 AM, Kristopher Schmid <solman at legacysolar.com <mailto:solman at legacysolar.com>> wrote:
> 
>> Hi All,
>> 
>> I recall a thread not so long ago where someone was having an issue with a system tripping the 60 A PV input breaker.  I am unable to find it by searching the archives.  I have a system with the same issue.  I tried replacing the breaker but it did not solve the issue.
>> 
>> Can someone connect me to that post thread and/or remind me of the solution to that problem (if one was found).
>> 
>> Thanks much,
>> Kris
>> 
>> -- 
>> Shine On!
>> 
>> Kris Schmid
>> Legacy Solar, LLC
>> 864 Clam Falls Trail
>> Frederic, WI 54837
>> www.legacysolar.com <http://www.legacysolar.com/>
>> 715-653-4295 <tel:715-653-4295>
>> NABCEP Certified PV Installer
>> Licensed Wisconsin Master Electrician
>> BSEE
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> 
> 
> -- 
> Shine On!
> 
> Kris Schmid
> Legacy Solar, LLC
> 864 Clam Falls Trail
> Frederic, WI 54837
> www.legacysolar.com <http://www.legacysolar.com/>
> 715-653-4295
> NABCEP Certified PV Installer
> Licensed Wisconsin Master Electrician
> BSEE
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