I didn't think an eGauge would provide that granular of detail if there is a very brief intermittent issue. If I'm wrong about that it might be worth a try.
What I really want to do is install a separate breaker in the main panel for the Envoy so it doesn't lose power when the IQ Combiner main breaker trips. I wonder if that would provide me any insight into what's happening immediately after the PV branch circuit and feeder circuit trip. On Mon, Jun 1, 2020 at 12:48 PM Jerry Shafer <[email protected]> wrote: > Jason, Wrenches > Can you install a data logger, say an eguage so you can see spikes or a > frequency shift, surge, most anything. > Install two non connected breakers to isolate the line, just for testing > purposes and see if it's only one that pops. > Jerry > > > On Mon, Jun 1, 2020, 9:11 AM Jason Szumlanski < > [email protected]> wrote: > >> I considered that, but it's tripping at night, so it's not a power output >> issue. It does have #6 wire, so this could be done, but I don't think it's >> related. It's a genuine CH240 breaker. We even replaced it once before. >> >> At this point, I must have a fault or faults on the roof. Maybe a rodent >> chewed through some wires. I'm going to wait for another fault and then go >> pull the modules to check it out. >> >> >> >> On Mon, Jun 1, 2020 at 11:00 AM jay <[email protected]> wrote: >> >>> Hi Jason, >>> >>> My curiosity is about both breakers tripping. >>> I would suggest using a larger output breaker, I believe its a 40, put >>> in a 50 as a test. I would assume the wire size will still be protected by >>> the 50. >>> >>> And I would also ask if the breakers are actual CH or clones? >>> >>> jay >>> >>> peltz power >>> >>> On Jun 1, 2020, at 7:23 AM, Jason Szumlanski < >>> [email protected]> 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 < >>> [email protected]> 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 <[email protected]> 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 <[email protected]> *On >>>>> Behalf Of *Jason Szumlanski >>>>> *Sent:* Thursday, May 21, 2020 8:57 AM >>>>> *To:* RE-wrenches <[email protected]> >>>>> *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. 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