[RE-wrenches] Head scratcher

[Dave Angelini Offgrid Solar]

Bill,  I get these from time to time. I mostly do them for an
installer/inverter company who does not want to come back to our extreme
rural area. It almost always is the AFCI. Good Luck

Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridsolar at sti.net
text 209 813 0060

On Wed, 19 Jun 2019 20:12:25 -0700, frenergy <frenergy at psln.com> wrote:
> Here's the deal....one year old system, 5KW string inverter with AFCI, 2

> strings.  About 3-4 times now when there is lightening in the area (not 
> real close), I get a fault that the the AFCI has shut down the 
> inverter.  I've accessed the inverter brains and reset it, all is 
> good....for awhile.  This last time I poked around more and found that 
> one of the strings was 0 Voc at the inverter.  Having installed a fused 
> combiner on the roof I checked there to find 425 Voc (about right for 11

> PVs) on the home run side and the output side of the fuse holder.  
> Inspected array for hanging, loose wiring, squirrels, etc....nothing, 
> all good. Checked at fuse holder again and got 0 Voc.
> 
>              My favorite problem, the intermittent one!  Do I need to
> remove and check every PV and connection?  I feel like I make up very 
> good UTX connector ends, I'm thinking its a bad PV or diode or trace or 
> PV lead.  I have not yet purchased an "Intermittent circuit detector" 
> meter yet.  Has somebody gone through this with some sage advice? 
Thanks
> 
> Bill
> 
> Feather River Solar Electric
> Bill Battagin, Owner
> 4291 Nelson St.
> Taylorsville, CA 95983
> 530.284.7849
> CA Lic 874049
> www.frenergy.net
> 
> 
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