[RE-wrenches] XW Pro and the spoiled stuff if the fridge

[Dave Angelini Offgrid Solar]

I would say did you look at historical events? It is easy to miss that 
and you only see current events. Is there surge protection on all the 
usual places? Not a fan of AC coupling XW.  Good Luck!

Dave Angelini Offgrid Solar
"we go where powerlines don't"
    [1]https://offgridsolar1.com/ [2]  [1]
e-mail  offgridsolar at sti.net
text 209 813 0060

On 2025-06-18 12:12 pm, Matt Sherald via RE-wrenches wrote:

> Hi All,
> 
> I'm writing to ask if anyone else might have run into a similar 
> situation.
> My customer came home to dead circuits after being out of town for 
> several weeks.  They are grid-tied and have a BBUS with an XW Pro.  
> Their PV array is AC-coupled (Enphase IQ7+).
> 
> When they arrived home all of the critical load circuits were dead.  
> The other circuits were working fine.  The internet router was dead.
> I got called and made a visit.  The XW was not feeding AC through to 
> the loads and it was not charging the batteries.
> 
> Two battery status lights on the XW were illuminated.  A value "279" 
> was displayed.  The small LED next to the "A"  for charging was 
> illuminated.  No other green LED was on - no AC1, no AC2, no Event, no 
> Equalize  .  The batteries had been discharged, but were well above the 
> LBCO.  I tested the grid and it was 60Hz with 240V.  All good there.
> 
> There is no SCP.  This is one of the early installs with a Gateway and 
> I did not have computer stuff to get a look at any codes or other 
> status info.
> 
> Perplexed, and a bit frustrated, I turned off the main DC 250A breaker 
> and let it sit for a couple of minutes.  Then I turned the breaker back 
> on and the XW worked just as one would hope - the grid connected 
> through AC1 and, in turn, powered the critical loads and began charging 
> the battery.
> 
> I thought that I would be able to find some answers once things were 
> back online and I got home to the office where I could look at Insight 
> and Enlighten.  Looking at the Enlighten data I could see that 
> production had ceased ten days prior to my visit.
> 
> Insight has no recorded Alarms/Warnings/Events for this time period.
> The XW load and battery discharging data show very little draw 
> throughout the period which makes me believe the AC loads were not 
> powered and the battery drain was attributable to idle consumption of 
> the XW, Gateway and Battery Monitor.
> 
> A series of thunderstorms coincided with the loss of data reporting.  
> The neighbors, when asked, offered that they had lost an internet 
> router to the same storms. They said that they didn't recall a power 
> outage, but their router was cooked and their PV system (Enphase) had 
> stopped working requiring them to contact tech support.
> 
> My gut is that a surge on the Gateway's CAT cable triggered the XW's 
> relays to open and stay open.  The system seems to be working just fine 
> now and doesn't appear to have suffered lasting damage.  Not so for the 
> venison in the freezer.
> 
> I'd love to hear from anyone who may have had a similar experience with 
> the XW or who feels like they have a fair guess as to what caused the 
> problem.
> -Matt
> 
> --
> 
> Matt Sherald PIMBY Energy, LLC
> 
> 304-704-5943
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Links:
------
[1] http://members.sti.net/offgridsolar/
[2] https://offgridsolar1.com/
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