Re: [RE-wrenches] SolArk and Tigo compatibility

2022-11-23 Thread Christopher Warfel via RE-wrenches 
Hi List, Tigo was hard to pin down on this issue and they told me to 
contact Sol-Ark. I did, and they called back and said the method I 
proposed was their recommended method.  So, I will reattach the 
drawing.  The one thing this does not do, is shut down the Critical 
Loads panel.  To do that would take three disconnects I think. One for 
the AC utility interconnection, one for the Tigo transmitter, and one 
for pin 11/12.  Thank you to everyone.  Have a peaceful Thanksgiving.  Chris

--
            Christopher Warfel
                 ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                401-466-8978




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Re: [RE-wrenches] Sunpower Performance Warranty Claim

2022-11-23 Thread August Goers via RE-wrenches 
Hi Danny -

We’ve been a SunPower dealer for close to 15 years and for the most part
their modules have been solid. Thank goodness. However, we have a site
installed in 2010 that is exhibiting “fern crack cell” and encapsulate
browning. This is the first I’ve seen of this, so it is something I’m
watching carefully. The modules are no longer within the original 10-yr
product warranty range, but are still within the 25-yr power warranty
range. In addition the SunnyBoy inverter is shot. So, our first step is to
get them a running inverter which is tricky because the system requires
positive grounding. On a side note, anyone find good inverter replacement
options when positive grounding is required? It seems like either we find
an old transformer based inverter or perhaps try one of the PID boxes on
the market? I’m hesitant to try the PID box until we get official approval
from SunPower.

 Once we accomplish getting them a running inverter, we’ll see how the
system is running and do some basic production vs irradiance tests.
SunPower indicated that Maxeon may replace the modules after we go through
the IV curve testing and/or infrared camera hot spot testing procedure. It
is interesting that now that SunPower and Maxeon are separate companies,
that the warranty holder is actually Maxeon but is facilitated through
SunPower.

Anyway, I don’t have any special tips dealing with SunPower getting back to
your question. What model modules are you dealing with on your warranty
claim and when were they installed, roughly?

Best,

August
Luminalt



On Tue, Nov 22, 2022 at 10:34 AM Daniel Young via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> Hello Wrenches,
>
>
>
> Any experience successfully submitting a performance warranty claim with
> SunPower on their solar modules? Right now, in order to Provide what they
> are asking for, we will likely spend more time/money testing to their
> satisfaction than it would cost for us to likely buy new modules and just
> replace the array.
>
>
>
> Anybody have a similar experience? Or suggestions on how to deal with
> Sunpower?
>
>
>
> Don’t want to bog this down with all the details but suffice to say we I-V
> traced the array at the string level as a sanity check (7-10 % lower than
> anticipated performance), and a random selection of individual modules as
> well and we are seeing roughly 8% lower performance than expected given the
> array age and listed performance warranty. (STC corrected I-V trace is 8%
> lower than it should be for an 8 year old solar module from SunPower)
>
>
>
> With Regards,
>
>
>
> --
>
>
>
> Danny Young
>
> NABCEP PV Installation Professional #031508-90
>
> Engineering Team Lead
> Solar Energy Solutions
>
> Lexington | Louisville | Bloomington | Cincinnati | Evansville |
> Indianapolis
>
> 513-448-5176 (mobile)
>
> 877-312-7456 (Main Office)
>
> da...@sesre.com
>
>
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> --
August Goers
Luminalt
o: 415.792.
m: 415.559.1525
aug...@luminalt.com
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