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<font size=3>Benn:<br><br>
I just designed one of these systems yesterday. It is for an
electrical engineer, so I thought carefully about this project.<br><br>
If you mount your modules directly to the S-5 clips, you need to install
modules in landscape orientation. If you have two columns, you can
place them in mirror image with all cables coming to the center.
This still leaves the question: can you cantilever each inverter off of
two clips? I say not good, because the torque will bend the seam and the
inverter will lay on the roof in the leaves. Plan B: Install
one inverter on each side of the seam, sharing two clips. This
reveals our new secret -- for a two row install, we put all of the
inverters on one rail, bringing the PV leads from the other row along the
module frame with Acme clips and SS ties to it's inverter (which is under
the <i>other</i> row of inverters). We have a proprietary method
for handling the inter-inverter cables.<br><br>
If you have more than two columns this becomes awkward for cable
routing: you have to bring cables from one column of inverters to
the other with nothing to tie the cables to.<br><br>
Mounting modules and inverters quite close to the roof may be good for
aesthetics, but it is not good for cooling and leaf clearing, and I worry
that mounting directly to the clips may put them too close. What I
suggest is to add a level of rail across the seams (mounted with clips)
and turning the modules portrait. This gives more clearance and a
structure to mount inverters to. If you put the leads all towards
the center, you can put all of the inverters on one rail (two will fit
easily side-by-side under one module), making cable routing much
easier.<br><br>
This all applies to the M series inverters. Reports from other
installers indicate the D series present multiple cabling and cost
problems.<br><br>
Good luck,<br><br>
William Miller<br><br>
<br><br>
<br>
At 08:06 AM 10/20/2010, you wrote:<br>
<blockquote type=cite class=cite cite>Mornin,<br><br>
I'm looking at mounting an Enphase M190 system on a standing seam metal
roof and was considering using the S-5-PV clamps (as opposed to just the
S-5's and L-feet), which do not use any mounting rails. No rails
means no where to properly mount the M190's!?!<br>
It was suggested to mount the M190's to each module frame using a
fashioned L-bracket, makes sense, but this would require drilling holes
in the module frame, and wouldn't that void the module warranty?
<br>
Also, am i the only one who is wondering if hanging a 4.4 pound inverter
off of the module frame will potentially cause some sagging/deformation
of the frame over the life of the system? Is this how those
"andalay" modules support their inverters? <br><br>
thanks,<br>
benn<br><br>
DayStar Renewable Energy Inc. <br>
benn@daystarsolar.ca<br>
780-906-7807 <br>
HAVE A SUNNY DAY <br><br>
<br><br>
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18:34:00</blockquote>
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<u>Please note new e-mail address and domain:<br><br>
</u>William Miller <br>
Miller Solar<br>
Voice :805-438-5600<br>
email: william@millersolar.com<br>
<a href="http://millersolar.com/" eudora="autourl">http://millersolar.com<br>
</a>License No. C-10-773985<br>
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