[RE-wrenches] Enphase intermittent breaker trippjng
Ray
ray at solarray.com
Wed Nov 18 20:13:38 EST 2020
What is the brand and model of the disconnect? Temp ratings of the
terminals? I've definitely had fuse holders not make good contact with
the fuses and burn the fuses at one end, instead of in the middle. Have
you looked at it with a Thermal imaging camera when its operating to see
if its hot on one end of the fuse?
Second, depending on the temperature it would be hitting inside the
enclosure in the sun, you could be exceeding the rating of the #6
conductor. Assuming terminals rated at 75C, then from 310.16, a #6 is
rated 65 A, but derate for temperature of 114F inside the enclosure gets
you to .82 x 65 = 53.3, which is a bit less than the 54.45 that Dave
just calculated for continuous duty.
What color is the disconnect painted? any chance of painting it white?
Ray Walters
Remote Solar
303 505-8760
On 11/18/20 4:16 PM, Dave Tedeyan wrote:
> Jason,
> Bright sunny days, disconnect on the west side of house, maybe in the
> sun? 43.56A * 1.25 for continuous duty = 54.45A. If these disconnects
> are also baking in the sun, maybe the extra ambient heat is enough to
> push it over the edge? Just a thought.
> Cheers,
> Dave
>
> *Dave Tedeyan, PE*
> Senior Engineer | Taitem Engineering, PC
>
> 110 South Albany Street | Ithaca, NY 14850
> o. _607.277.1118 x121_ f. 607.277.2119
> www.taitem.com <http://www.taitem.com>
>
> Solar •Sustainability • Energy • Design
> Certified B-Corporation since 2013
>
>
> On Wed, Nov 18, 2020 at 3:41 PM Jay <jay.peltz at gmail.com
> <mailto:jay.peltz at gmail.com>> wrote:
>
> Hi Jason
>
> Any chance for some photos?
>
> Jay
>
>> On Nov 18, 2020, at 12:18 PM, Jason Szumlanski
>> <jason at floridasolardesigngroup.com
>> <mailto:jason at floridasolardesigngroup.com>> wrote:
>>
>>
>> The plot thickens on the fuse blowing issue. Again, we tore the
>> Enphase IQ system apart looking for any reason for the fuse to
>> keep blowing. We reconfirmed torque on all line side
>> conductors to the service (supply side interconnection using
>> Polaris taps).
>>
>> Low and behold, I get a second client with the exact same issue
>> yesterday. The circumstances are eerily alike. Both disconnects
>> are located on the west side of the house and have 36 IQ7+
>> microinverters on an IQ Combiner, requiring 60A fuses on the 60A
>> fusible disconnect. The combined inverter output rating is
>> 43.56A. The interconnections are identical with #6 THHN 90ºC
>> conductors and Polaris taps. Both disconnects have conductors on
>> the right-hand side line-side terminal that are discolored (the
>> copper is silvery, the insulation is not burned). The fuses blow
>> at peak current around 1:30 pm, only on bright and sunny days.
>>
>> I'm starting to suspect a faulty fusible disconnect switch. Maybe
>> the blades are not making proper contact with the line side
>> terminals.
>>
>> For the client who is having regular/frequent fuses blowing I
>> plan to replace the disconnect with a heavy-duty version or
>> possibly get a 100A disconnect with fuse reducers. I'm not sure
>> which option would yield a better test. I might also switch brands.
>>
>> Currently, we are using GE TG3222R. The fuses are Bussman FRN-R
>> Time Delay. I have to believe a heavy-duty switch would be less
>> susceptible to this, but maybe a higher rated one would be a
>> better option. I'm not a fan of fuse reducers, however.
>>
>> Jason Szumlanski
>> Florida Solar Design Group
>>
>>
>> On Sun, Aug 30, 2020 at 5:54 PM Jason Szumlanski
>> <jason at floridasolardesigngroup.com
>> <mailto:jason at floridasolardesigngroup.com>> wrote:
>>
>> The tripping breaker occurred at random times, even at night.
>> No weather-related correlation.
>>
>> I have more research to do to see when this fuse issue is
>> happening, but previous visits showed no water ingress. I'm
>> not sure about temperature.
>>
>> *
>>
>> *
>>
>>
>> On Thu, Aug 27, 2020 at 8:51 PM Jay <jay.peltz at gmail.com
>> <mailto:jay.peltz at gmail.com>> wrote:
>>
>> Hi Jason
>>
>> One thought I have about the blowing fuse is to check it
>> with a IR tool.
>>
>> I suspect a poor connection of the fuse to holder which
>> during higher air temp is causing it to fail.
>> I’m assuming that the correct amp size and slow blow fuse
>> Is installed and that the wire connections are done
>> correctly. But again an IR tool during peak heat would be
>> a good test.
>>
>> About the enphase fix, wow what a head scratcher. But
>> given that it’s fixed it means that it’s not a short, but
>> enough amps going through over enough time to trip it. I
>> wonder if a magnetic hydraulic vs thermal breaker ( CBI
>> vs CH etc) would have worked?
>>
>> Is that breaker box ever in the sun? Is there any
>> Correlation between high ambient temperatures and tripping?
>>
>> It sure would keep me up at night too
>>
>> Jay
>>
>>
>>> On Aug 27, 2020, at 4:29 PM, Jason Szumlanski
>>> <jason at floridasolardesigngroup.com
>>> <mailto:jason at floridasolardesigngroup.com>> wrote:
>>>
>>>
>>> So the resolution to this is in... But I still have no
>>> idea what was wrong.
>>>
>>> The string of 10 offending microinverters was split into
>>> 5 and 5. We had a spare breaker in the IQ Combiner so it
>>> was relatively easy to run another branch circuit. It
>>> has been over two months with no recurrence. So the
>>> issue seems to be resolved, but again, no idea why.
>>>
>>> So here we go again... On another system we have a
>>> similar problem now. In this case it is supply side
>>> interconnected with a fusible disconnect. The same fuse
>>> (same line) keeps blowing every few to several weeks. We
>>> can't find any home run wiring issues or issues with
>>> terminator caps. There are no apparent faults in the AC
>>> Combiner. We have no idea why this is happening. But in
>>> this system, just the fuse blows, not one of the
>>> individual branch circuit breakers.
>>>
>>> This is getting very frustrating. And this is way more
>>> serious because fuses and service calls are expensive
>>> and I can't isolate the issue to one branch circuit. I
>>> don't even know where to start. Leaving each circuit
>>> disconnected for several weeks to prove a negative is an
>>> untenable suggestion to make to a client. But I don't
>>> see any other good options.
>>>
>>> Jason Szumlanski
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Tue, Jun 9, 2020, 3:42 PM Jason Szumlanski
>>> <jason at floridasolardesigngroup.com
>>> <mailto:jason at floridasolardesigngroup.com>> wrote:
>>>
>>> Yes, we double-checked that. I have seen that happen
>>> before and it's one of my early diagnostic steps for
>>> something like this.
>>>
>>> *
>>>
>>> *
>>>
>>>
>>> On Tue, Jun 9, 2020 at 9:18 AM Mac Lewis
>>> <maclewis1 at gmail.com <mailto:maclewis1 at gmail.com>>
>>> wrote:
>>>
>>> Hi Jason,
>>>
>>> Are you certain that the branch circuits aren't
>>> crisscrossed somewhere, meaning that an L1
>>> branch 1, isn't connected to an L2 branch 2?
>>> That could explain two different breakers tripping.
>>>
>>> Good luck
>>>
>>>
>>> On Wed, Jun 3, 2020 at 1:07 PM Jason Szumlanski
>>> <jason at floridasolardesigngroup.com
>>> <mailto:jason at floridasolardesigngroup.com>> wrote:
>>>
>>> Undoubtedly, the termination caps are the
>>> second thing we check after the rooftop
>>> junction box(es). These are prone to
>>> installation errors, even when the right
>>> parts are used. And given the cost, I've
>>> thought very long and hard about abandoning
>>> them altogether and terminating strings in
>>> small j-boxes with watertight fittings. But
>>> in this case, there was no evidence of
>>> improper installation (we replaced them) and
>>> it was not correlated to rain events.
>>>
>>> We are well equipped with bare Q-cable and
>>> field wireables that we could use for
>>> troubleshooting to bypass certain sections,
>>> but the intermittent nature of the problem
>>> and unpredictable timeframe between faults
>>> is very frustrating. While this is a
>>> rare occurrence, it is definitely a "con" to
>>> consider when comparing string vs.
>>> microinverters that I had not strongly
>>> considered in the past. I'm intent on
>>> getting to the bottom of this in order to
>>> learn what to look for in the future and how
>>> to approach diagnoses of Enphase
>>> branch circuit faults.
>>>
>>> Jason
>>>
>>>
>>> *
>>>
>>> *
>>>
>>>
>>> On Wed, Jun 3, 2020 at 2:31 PM Amos Post
>>> <integrityenergy101 at gmail.com
>>> <mailto:integrityenergy101 at gmail.com>> wrote:
>>>
>>> I was just at a site last week where the
>>> Enphase branch circuit breaker, outside
>>> utility disconnect breaker, and feed
>>> breaker in the main panel all tripped
>>> simultaneously, and it happened about 1
>>> hour before I showed up onsite. The
>>> customer said it had happened 1 other
>>> time last fall but that time it was just
>>> the 1 branch circuit in the Enphase
>>> combiner panel. Interestingly the
>>> customer mentioned that he had just
>>> washed off the panels, also about 1 hour
>>> before I got there. I went on the roof
>>> and found that the installing contractor
>>> had not put on the Enphase termination
>>> caps. 1 string was wire-nutted with
>>> regular wire nuts and sitting on the
>>> roof, and the roof was damp right there.
>>> This was a fairly flat roof. The other
>>> micro trunk cable was just cut with no
>>> protection at all, tied to the rail…
>>>
>>>
>>> <IE LOGO 150x78.jpg>
>>>
>>>
>>> Amos Post
>>> Integrity Energy
>>> W 802.763.7023
>>> C 802.291.2188
>>> ienergyVT.com
>>> <https://mailtrack.io/trace/link/3d62f76a530747b19a4154eb2e2b0d2548eee0a0?url=http%3A%2F%2Fwww.ienergyvt.com&userId=1613865&signature=6df658aa959a645e>
>>>
>>> Facebook
>>> <https://mailtrack.io/trace/link/d6455a016d2384afbd80a78dab5594aee31be9f3?url=https%3A%2F%2Fwww.facebook.com%2Fintegrityenergyllp%3Fref%3Dhl&userId=1613865&signature=8d22e279508a21c8>
>>>
>>>> On Jun 3, 2020, at 2:05 PM, Jason
>>>> Szumlanski
>>>> <jason at floridasolardesigngroup.com
>>>> <mailto:jason at floridasolardesigngroup.com>>
>>>> wrote:
>>>>
>>>> The breaker in the main panel IS
>>>> tripping simultaneously with one of the
>>>> branch circuit breakers each time.
>>>> *
>>>>
>>>>
>>>>
>>>>
>>>> *
>>>>
>>>>
>>>> On Wed, Jun 3, 2020 at 12:43 PM Jay
>>>> <jay.peltz at gmail.com
>>>> <mailto:jay.peltz at gmail.com>> wrote:
>>>>
>>>> A question that keeps nagging me is
>>>> why do these breakers trip and not
>>>> the breaker in the main panel?
>>>> Presuming there is a 40 amp in the main
>>>>
>>>> I would have thought that given all
>>>> the times the breakers have tripped
>>>> at some point that one would have
>>>> tripped and I can’t understand why
>>>> not?
>>>>
>>>> Jay
>>>>
>>>>> On Jun 3, 2020, at 8:27 AM, Jerry
>>>>> Shafer <jerrysgarage01 at gmail.com
>>>>> <mailto:jerrysgarage01 at gmail.com>>
>>>>> wrote:
>>>>>
>>>>>
>>>>> Wrenches
>>>>> Looking g at the bigger breaker
>>>>> tripping at the same time is very
>>>>> likely do to response time of the
>>>>> breaker nothing more. As l
>>>>> suggested in a previous message.
>>>>> Use a non bridged breaker to see
>>>>> if it is one or both legs that
>>>>> trip. Also an eguage will help to
>>>>> see what if anything leads up to
>>>>> the failure and when.
>>>>> Jerry
>>>>> Jerry
>>>>>
>>>>> On Wed, Jun 3, 2020, 7:58 AM Jason
>>>>> Szumlanski
>>>>> <jason at floridasolardesigngroup.com
>>>>> <mailto:jason at floridasolardesigngroup.com>>
>>>>> wrote:
>>>>>
>>>>> I wonder about that. Of
>>>>> course, it could be the
>>>>> "inverter output circuit"
>>>>> having a fault in the wiring
>>>>> still (an intermittent issue
>>>>> somewhere within the IQ cable
>>>>> or home run wiring). But
>>>>> internal to the microinverter,
>>>>> is it possible that a fault
>>>>> could still occur at night? I
>>>>> had a suggestion from another
>>>>> wrench that there are film
>>>>> capacitors on the AC output
>>>>> side, but are these isolated
>>>>> when there is no DC input? It
>>>>> seems unlikely that this would
>>>>> be an issue, but I have seen
>>>>> microinverters reporting a
>>>>> couple of watts at night (in
>>>>> Enlighten). I'm not sure how
>>>>> real that is.
>>>>>
>>>>> The overriding question I have
>>>>> is what kind of fault would
>>>>> cause BOTH a branch circuit
>>>>> and the main solar breaker to
>>>>> trip simultaneously? That
>>>>> seems odd to me. If any normal
>>>>> load branch circuit has a
>>>>> fault, you don't often see
>>>>> premises main breakers
>>>>> tripping, or even feeder
>>>>> circuit breakers.
>>>>>
>>>>> I got to thinking that maybe
>>>>> there is some kind of issue
>>>>> between the BR220 and CH240
>>>>> breakers not playing nicely
>>>>> together. But I would think
>>>>> this would be a well-known
>>>>> issue because I'm sure there
>>>>> are tons of CH feeder breakers
>>>>> in the wild with BR branch
>>>>> circuits downstream.
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Jun 2, 2020 at 9:25 AM
>>>>> <drake.chamberlin at redwoodalliance.org
>>>>> <mailto:drake.chamberlin at redwoodalliance.org>>
>>>>> wrote:
>>>>>
>>>>> If it trips at night, we
>>>>> know it is not the output
>>>>> from the inverters causing
>>>>> the tripping. The current
>>>>> must be coming from the grid.
>>>>>
>>>>> ---
>>>>>
>>>>>
>>>>> On 2020-06-01 12:05, Jason
>>>>> Szumlanski wrote:
>>>>>
>>>>>> It's not weather. It's at
>>>>>> all times of the day and
>>>>>> night, and I confirmed
>>>>>> that there is no
>>>>>> correlation to rain or
>>>>>> high winds. That was my
>>>>>> first suspicion.
>>>>>>
>>>>>> On Mon, Jun 1, 2020 at
>>>>>> 10:27 AM Ray
>>>>>> <ray at solarray.com
>>>>>> <mailto:ray at solarray.com>>
>>>>>> wrote:
>>>>>>
>>>>>> Is it at all weather
>>>>>> related? Rain, or
>>>>>> high humidity? High
>>>>>> temperatures? Do you
>>>>>> have any indication
>>>>>> what time of day it
>>>>>> trips off at?
>>>>>>
>>>>>> Ray Walters
>>>>>> Remote Solar
>>>>>> 303 505-8760
>>>>>>
>>>>>> On 6/1/20 10:23 AM,
>>>>>> Jason Szumlanski wrote:
>>>>>>> Well, that didn't
>>>>>>> resolve it. The main
>>>>>>> breaker and a branch
>>>>>>> circuit breaker
>>>>>>> tripped again a few
>>>>>>> days ago. It was the
>>>>>>> same branch this time.
>>>>>>> As my next
>>>>>>> diagnostic step I
>>>>>>> swapped two circuits
>>>>>>> (on which breaker
>>>>>>> they are landed). If
>>>>>>> history is a guide,
>>>>>>> it will work for
>>>>>>> about two weeks and
>>>>>>> then trip again.
>>>>>>> I'm dumbfounded. I
>>>>>>> really don't want to
>>>>>>> have to tear this
>>>>>>> whole system apart.
>>>>>>> At this point, if I
>>>>>>> have to remove all
>>>>>>> the modules, I feel
>>>>>>> that I need to
>>>>>>> replace all of the
>>>>>>> trunk cable which is
>>>>>>> an expensive
>>>>>>> proposition. I
>>>>>>> really don't know
>>>>>>> what else to do at
>>>>>>> this point.
>>>>>>> Jason
>>>>>>>
>>>>>>> On Mon, May 25,
>>>>>>> 2020, 10:43 AM Jason
>>>>>>> Szumlanski
>>>>>>> <jason at floridasolardesigngroup.com
>>>>>>> <mailto:jason at floridasolardesigngroup.com>>
>>>>>>> wrote:
>>>>>>>
>>>>>>> I strongly
>>>>>>> suspect the
>>>>>>> CH240 combined
>>>>>>> breaker was
>>>>>>> compromised (we
>>>>>>> will see). Since
>>>>>>> it happened that
>>>>>>> two different
>>>>>>> strings tripped,
>>>>>>> I doubt I have
>>>>>>> two
>>>>>>> microinverters
>>>>>>> with internal
>>>>>>> faults. It has
>>>>>>> to be the
>>>>>>> combined
>>>>>>> breaker. I was
>>>>>>> just surprised
>>>>>>> that branch
>>>>>>> circuit breakers
>>>>>>> were tripping
>>>>>>> simultaneously with
>>>>>>> the combined
>>>>>>> output breaker.
>>>>>>> Of all the
>>>>>>> supply side
>>>>>>> connected
>>>>>>> systems I have
>>>>>>> installed, I
>>>>>>> have never seen
>>>>>>> a combined
>>>>>>> output fusible
>>>>>>> disconnect fuse
>>>>>>> blow, but I have
>>>>>>> seen many
>>>>>>> combined output
>>>>>>> breakers
>>>>>>> tripped. I was
>>>>>>> worried early on
>>>>>>> that I would be
>>>>>>> replacing fuses
>>>>>>> constantly, but
>>>>>>> that has not
>>>>>>> been an issue
>>>>>>> whatsoever.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Thu, May 21,
>>>>>>> 2020 at 11:15 AM
>>>>>>> <scot.arey at solarcentex.com
>>>>>>> <mailto:scot.arey at solarcentex.com>>
>>>>>>> wrote:
>>>>>>>
>>>>>>> Actually, we
>>>>>>> had a IQ7
>>>>>>> string
>>>>>>> loaded up to
>>>>>>> its max
>>>>>>> panel size
>>>>>>> and max
>>>>>>> string
>>>>>>> length and
>>>>>>> in the
>>>>>>> spring on
>>>>>>> cool, clear
>>>>>>> day, it
>>>>>>> tripped the
>>>>>>> string's
>>>>>>> associated
>>>>>>> breaker in
>>>>>>> the Enphase
>>>>>>> combiner.
>>>>>>>
>>>>>>>
>>>>>>> We reset but
>>>>>>> of course
>>>>>>> that breaker
>>>>>>> was impaired
>>>>>>> and it
>>>>>>> tripped
>>>>>>> again. We
>>>>>>> replaced and
>>>>>>> never had an
>>>>>>> issue going
>>>>>>> forward. We
>>>>>>> suspect the
>>>>>>> breaker was
>>>>>>> less than
>>>>>>> perfect from
>>>>>>> the start as
>>>>>>> we've add
>>>>>>> equally nice
>>>>>>> days since.
>>>>>>>
>>>>>>>
>>>>>>> This almost
>>>>>>> reminds me
>>>>>>> of loading
>>>>>>> up Outback
>>>>>>> FM80. It
>>>>>>> says 4,000
>>>>>>> watts but in
>>>>>>> reality,
>>>>>>> 3,600 is the
>>>>>>> max when
>>>>>>> amps spike.
>>>>>>> I will be
>>>>>>> extra
>>>>>>> careful
>>>>>>> going
>>>>>>> forward on
>>>>>>> IQ7 string
>>>>>>> length when
>>>>>>> going to the
>>>>>>> max published...
>>>>>>>
>>>>>>>
>>>>>>> My story.
>>>>>>>
>>>>>>>
>>>>>>> Scot
>>>>>>>
>>>>>>>
>>>>>>> *From:*RE-wrenches
>>>>>>> <re-wrenches-bounces at lists.re-wrenches.org
>>>>>>> <mailto:re-wrenches-bounces at lists.re-wrenches.org>>*On
>>>>>>> Behalf
>>>>>>> Of*Jason
>>>>>>> Szumlanski
>>>>>>> *Sent:*Thursday,
>>>>>>> May 21, 2020
>>>>>>> 8:57 AM
>>>>>>> *To:*RE-wrenches
>>>>>>> <re-wrenches at lists.re-wrenches.org
>>>>>>> <mailto:re-wrenches at lists.re-wrenches.org>>
>>>>>>> *Subject:*[RE-wrenches]
>>>>>>> Enphase
>>>>>>> intermittent
>>>>>>> breaker trippjng
>>>>>>>
>>>>>>>
>>>>>>> I'm trying
>>>>>>> to resolve
>>>>>>> an
>>>>>>> intermittent
>>>>>>> frustrating
>>>>>>> problem with
>>>>>>> and Enphase
>>>>>>> IQ system.
>>>>>>> There are
>>>>>>> three AC
>>>>>>> Branch
>>>>>>> circuits of
>>>>>>> 9
>>>>>>> microinverters
>>>>>>> each coming
>>>>>>> into an
>>>>>>> Enphase AC
>>>>>>> combiner.
>>>>>>>
>>>>>>>
>>>>>>> What has
>>>>>>> been
>>>>>>> happening is
>>>>>>> one of the
>>>>>>> BR220 branch
>>>>>>> circuit
>>>>>>> breakers and
>>>>>>> the combine
>>>>>>> CH240
>>>>>>> breaker in
>>>>>>> the main
>>>>>>> backfed load
>>>>>>> center have
>>>>>>> been
>>>>>>> tripping
>>>>>>> simultaneously.
>>>>>>> It has
>>>>>>> happened
>>>>>>> about four
>>>>>>> times in the
>>>>>>> last 6
>>>>>>> months. It
>>>>>>> was always
>>>>>>> the same
>>>>>>> branch
>>>>>>> circuit
>>>>>>> breaker, so
>>>>>>> we kept
>>>>>>> investigating
>>>>>>> that string,
>>>>>>> checking the
>>>>>>> junction
>>>>>>> box, trunk
>>>>>>> cable, and
>>>>>>> cap, etc.
>>>>>>> Finally we
>>>>>>> swapped out
>>>>>>> the BR220
>>>>>>> breaker.
>>>>>>>
>>>>>>>
>>>>>>> Fast forward
>>>>>>> 4 weeks, and
>>>>>>> we got
>>>>>>> another
>>>>>>> call. This
>>>>>>> time a
>>>>>>> different
>>>>>>> branch
>>>>>>> circuit
>>>>>>> breaker and
>>>>>>> the main
>>>>>>> breaker
>>>>>>> tripped
>>>>>>> simultaneously.
>>>>>>> We checked
>>>>>>> that branch
>>>>>>> circuit and
>>>>>>> could not
>>>>>>> find any
>>>>>>> fault. It
>>>>>>> seems
>>>>>>> unlikely
>>>>>>> that two
>>>>>>> branch
>>>>>>> circuit
>>>>>>> breakers
>>>>>>> would be
>>>>>>> faulty, so
>>>>>>> we have now
>>>>>>> switched out
>>>>>>> the CH240
>>>>>>> main breaker
>>>>>>> in hopes
>>>>>>> that it is
>>>>>>> the culprit.
>>>>>>>
>>>>>>>
>>>>>>> I'm not
>>>>>>> totally
>>>>>>> confident in
>>>>>>> this
>>>>>>> resolution
>>>>>>> and I have
>>>>>>> my fingers
>>>>>>> crossed. If
>>>>>>> that doesn't
>>>>>>> work, does
>>>>>>> anyone have
>>>>>>> any
>>>>>>> suggestions
>>>>>>> on another
>>>>>>> diagnostic
>>>>>>> step? These
>>>>>>> intermittent
>>>>>>> problems are
>>>>>>> a major
>>>>>>> hassle. One
>>>>>>> thought I
>>>>>>> had was to
>>>>>>> switch to a
>>>>>>> supply side
>>>>>>> interconnection
>>>>>>> with a
>>>>>>> fusible
>>>>>>> disconnect.
>>>>>>> Maybe the
>>>>>>> intermittent
>>>>>>> fault would
>>>>>>> blow one of
>>>>>>> the two line
>>>>>>> fuses so at
>>>>>>> least I
>>>>>>> could narrow
>>>>>>> it down to
>>>>>>> which line
>>>>>>> the fault is
>>>>>>> on if there
>>>>>>> is in fact a
>>>>>>> fault.
>>>>>>>
>>>>>>>
>>>>>>> I have
>>>>>>> experienced
>>>>>>> two other
>>>>>>> tripping
>>>>>>> breaker
>>>>>>> issues with
>>>>>>> Enphase
>>>>>>> systems in
>>>>>>> the past.
>>>>>>> Neither of
>>>>>>> them were
>>>>>>> systems I
>>>>>>> installed.
>>>>>>> One turned
>>>>>>> out to be
>>>>>>> branch
>>>>>>> circuits
>>>>>>> that were
>>>>>>> not properly
>>>>>>> paired up
>>>>>>> and landed
>>>>>>> on different
>>>>>>> breakers.
>>>>>>> Another time
>>>>>>> we had an
>>>>>>> inverter
>>>>>>> with an
>>>>>>> internal
>>>>>>> fault which
>>>>>>> eventually"blew
>>>>>>> up" with a
>>>>>>> loud popping
>>>>>>> noise and
>>>>>>> smoke
>>>>>>> billowing
>>>>>>> out of it.
>>>>>>> That
>>>>>>> happened
>>>>>>> after
>>>>>>> resetting a
>>>>>>> trip breaker
>>>>>>> multiple
>>>>>>> times. This
>>>>>>> case seems
>>>>>>> to be
>>>>>>> unrelated to
>>>>>>> those
>>>>>>> issues. I'm
>>>>>>> perplexed.
>>>>>>>
>>>>>>>
>>>>>>> Jason Szumlanski
>>>>>>>
>>>>>>> Florida
>>>>>>> Solar Design
>>>>>>> Group
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>>
>>>
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> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
> <mailto:RE-wrenches at lists.re-wrenches.org>
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org>
>
> There are two list archives for searching. When one doesn't work,
> try the other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> <https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/>
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
> <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org>
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
> <http://www.re-wrenches.org/etiquette.htm>
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
> <http://www.members.re-wrenches.org>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
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