Peter-
Appendix J of "PV and the NEC" covers this, too; as Kirpal said, you'll
need to know the series fuse rating for the module first, though.
http://www.nmsu.edu/~tdi/pdf-resources/pdf%20version%20divided%20PV:NEC/APPENDIX%20J.pdf
-------- Original Message --------
Subject: Re: [RE-wrenches] String Combiners for a-Si modules
From: Peter Parrish <peter.parr...@calsolareng.com>
To: 'RE-wrenches' <re-wrenches@lists.re-wrenches.org>
Date: 2009/7/21 20:51
EPV Solar EVP-54
The Isc is 1.49 A
The cut sheet does not list a series fuse rating for the module.
But it does say something about being able to use up to 8 in parallel
without external protection.
I am in the hunt for installation instructions.
- Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parr...@calsolareng.com <mailto:peter.parr...@calsolareng.com>
Ph 323-258-8883, Mobile 323-839-6108, Fax
323-258-8885
------------------------------------------------------------------------
*From:* re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Kirpal
Khalsa
*Sent:* Tuesday, July 21, 2009 3:11 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] String Combiners for a-Si modules
Peter...depending on the series fuse rating you might be able to get
away with more strings in parallel before series fusing is
required........what panels are they and what is the series fuse rating
of the modules?
Fronius has a white paper explaining when series fusing is required and
when you can get by without.......it all relates to series fuse rating
and Isc......the higher the series fuse rating and the lower the Isc the
more strings you can parallel with out adding series fusing........
--
Sunny Regards,
Kirpal Khalsa
NABCEP Certified Solar PV Installer
Renewable Energy Systems
www.oregonsolarworks.com <http://www.oregonsolarworks.com>
541-218-0201 m
541-592-3958 o
On Tue, Jul 21, 2009 at 2:44 PM, Peter Parrish
<peter.parr...@calsolareng.com <mailto:peter.parr...@calsolareng.com>>
wrote:
We are doing an engineering design for a large scale PV ground mount system
based on a-Si modules. Since the Isc of the modules is 1.5 A, instead of 7-8
A of typical c-Si modules, are there special low-current combiners out
there? Does each string need an overcurrent protection device? Any help with
a-Si based system design would be greatly appreciated.
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parr...@calsolareng.com <mailto:peter.parr...@calsolareng.com>
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
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