[RE-wrenches] SMA phantom arc faults

[frenergy]

Hey Marco,

             I hear you, we have installed many SMA-40's and we're not 
at the same point as you may be but we've definitely had a fair number 
of arc fault shut-downs which take a site visit to rectify.  One 
location had been experiencing lightening over a year and a half which 
seemed to be triggering the 8206 code.

             I had to go back three times to one such install. After 
that I went back with my array map (before an install I make a laminated 
map of the strings with home-run locations) and started inspecting 
home-run connections.  I was lucky and found the culprit with my first 
try.  Somehow I hadn't pushed the wire end which I had crimped on the 
tip to far enough into the plastic connector....too cold maybe? lazy? 
distracted?...not sure but there it was, my bad.  I took that connector 
back to the shop and sure enough it would show intermittent connection 
with an ohm meter, perfect for an arc fault.

             This doesn't answer your question about the fix but thought 
I'd apply a little egg to my face in the hopes of saving others the same.

Bill

Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
CA Lic 874049
www.frenergy.net

On 9/1/2019 10:42 AM, Marco Mangelsdorf wrote:
> Aloha all,
>
> My company has really been struggling with the SMA US-40 line of 
> inverters and incredibly disruptive to positive customer experiences 
> bogus arc faults.
>
> We were told by our SMA friends that a firmware update/fix was 
> forthcoming in mid-August and we’ve heard nor received nothing last month.
>
> Does anyone know anything as to where they’re at on this?
>
> Really frustrated....
>
> marco
>
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