[RE-wrenches] EG4 Equipment

[Dan Fink]

The issue I'm having with EG4 specifically and Signature Solar in general
is a scattershot approach to UL and NRTL listings. Those listings may not
be important to various DIY folks of varying levels of "git-er-done," but
listings are critical for my business. Some products they sell are Listed
per NEC, some are not, and some EG4 are listed, some are not. I recently
contacted Signature Solar regarding their EG4 rack mount ESS modules and
did not receive a satisfactory response, unfortunately a new off-grid
client had already purchased an entire rack of them before consulting with
me. Our county AHJ is very strict. I can't risk recommending or installing
a system that would fail inspection. Here in Colorado they often even cross
check the altitude ratings on all inverters. (sorry Schneider XW-Pro that I
like so much, limit on your spec sheet is 2000m altitude)

Signature Solar provided the usual NRTL stamp for UL 1741SA etc etc on the
EG4 rack batteries, then also a UL 9540A testing certificate that they said
should be sufficient, and it disturbed me that they did not seem to
understand that UL 9540A is NOT a listing - it's a fire-resistance test
that an ESS manufacturer can use as a document to help obtain their actual
UL9540 listing, and also gain exemptions to spacing and other
requirements....but from my understanding it's NOT an actual UL or NRTL
listing to UL 9540. When I inquired about that, Signature Solar stopped
communicating with me.

I'm pretty sure my understanding of UL 9540 listing vs. 9540A testing is
correct, but I would appreciate any input before again gently confronting
both AHJs and manufacturers.

Dan Fink
Owner, Buckville Energy Consulting LLC
IREC Certified Instructor for PV and Small Wind Installation
NABCEP Certified PV System Inspector
NABCEP PV Associate
d <dan.fink at greendustrialtraining.com>anbob88 at gmail.com
970-672-4342

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