Drake -
We've done lots of systems both ways - using rails such as Unirac solarmount or ProSolar is definately more forgiving compared to mounting directly on the seams. The adjustability of the Unirac L-foot is particularly nice. If you mount directly to the seams you need to mount in landscape orientation and alignment can be tricky. You still need to ground your array, however. Were you planning on using weebs? -August *From:* [email protected] [mailto: [email protected]] *On Behalf Of *Drake *Sent:* Friday, February 18, 2011 6:57 AM *To:* RE-wrenches *Subject:* [RE-wrenches] Seam clamps with or w/o rails Hello Wrenches, We have a system to install on a roof with standing seams, and are planning to use S-5 clamps. The current plan is to use Solarmount rails. This seemed to be a good solution for grounding, rather than putting lugs on every module, and also would allow better air circulation under the array. Would you agree with this concept, or would you recommend connecting the modules straight to the seam clamps? Are there any down sides to using the rails with the S-5s? Thanks, Drake Drake Chamberlin Athens Electric OH License 44810 CO license 3773 NABCEP Certified PV
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