[RE-wrenches] AET Rayport array #1

[Garrison Riegel]

Hi Jim,

 

We have installed a number of these racks both with and without micros.
It’s a good system that allows for a lot of flexibility in layout and
design, and seems pretty durable once bolted together.  Just make sure to
request the integrated bonding clamps (they also have a leash, which adds
considerable time to the job).  The Enphase approved bracket works well, but
wire management with micros can be difficult.  I originally selected this
rack because the top down clamps worked with the flangeless SolarWorld 2.0
frame, but you really need that flange to keep your wires up.  If you do go
Enphase I would recommend checking out the Heyco SunRunner 2 cable clip (MPN
S6404).

 

http://www.heyco.com/Alternative_Energy_Products/pdf/1-11.pdf

 

Also, the ballast tray feet are a little sharp.  They had an epdm cover, but
I’m told they are not going to include this in the future.  I would
recommend either a slip sheet under the trays or you use the AET ballast pad
to protect the roof membrane.

 

Good luck!

 

Garrison  

 

Garrison Riegel

Project Manager 

 

Solar Service Inc

[p] 847-677-0950

[f] 847-647-9360

www.solarserviceinc.com <http://www.solarserviceinc.com/> 

 

NABCEP Certified Solar PV and Thermal Installer™

 

  _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Solarguy
Sent: Thursday, August 23, 2012 11:22 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] AET Rayport array #1

 

Wrenches

We’re preparing a design for a 2nd story flat commercial office building
roof using AET 15° stainless frames with ballast. The 1920s vintage building
is on the National Register of Historical Places so fortunately the  array
will be hidden behind a 3 ft parapet. No real problem there but a large
amount of hvac equipment is squeezed into the center of the roof to keep it
invisible from the street per those same historical mandates. This allows us
a pretty large area on 3 sides of the perimeter for the array. The array is
about 25 kW but it is confined to a large “C” shaped area just inside the
parapet. 

So having never installed this AET product I’m looking for recommendations
from Wrenches who have worked with this before.

AETs design, made from my scale dimensioned drawing tries to fill every open
space but I plan to delete a few modules and have basically one continuous
array  around 3 sides. There will be a couple of  access routes to the roofs
edge to keep city safety officials happy. 

Also the limited space in the electrical room will almost for sure require
us to use either micro inverters or several 5-7 kW string inverters on the
roof, not my favorite strategy. Some potential shading by the south wall
parapet may incline me to use both micros and string inverters. 

Advice please

Thanks as always
.

 

Jim Duncan

North Texas Renewable Energy Inc

www.ntrei.com <http://www.ntrei.com/>  

NABCEP PV 031310-57

TECL-27398

ntrei at 1scom.net 

817.917.0527

 

 

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