series circuits for Sunny Boy [RE-wrenches]

[Jeffrey Wolfe, Global Resources]

Marco,

600VDC gets pretty expensive, pretty fast. And limited suppliers and longer 
lead times. At least that's our experience.

I wish I had known about the Trace Tech 600VDC combiners, I could have used 
one and saved myself some research time and money! That sounds like what 
I'd go with, just make sure that the $400 includes fuses.

Jeff
Jeffery D. Wolfe, P.E.
Global Resource Options, LLP
A Woman-Owned Limited Liability Partnership
Xantrex/Trace Certified Dealer
Bergey WindPower Certified Dealer
4 Kibling Hill Road
P.O. Box 51
Strafford, VT 05072
global at sover.net
http://globalresourceoptions.com

On Sunday, December 02, 2001 6:14 PM, Mangelsdorf, Marco 
[SMTP:mmangelsdorf at hei.com] wrote:
> Aloha Wrenches,
>
> Does anyone know of a relatively low cost high voltage (up to 600 VDC)
> combiner box that has, say, two or three fuse holders?
>
> We've finished the first Sunny Boy 2500U installation here in the islands
> with two parallel series-wired sets of (10) BP 150-watt 24 VDC modules.
> According to a reasonable interpretation of the NEC 690-9 (b), there is 
no
> need for fuse protection of each series circuit of modules.  So, in the
> install, I have both sets of modules wired directly to a single pair of
> #10CU conductors with no fuses.  The inspection did not pass last friday
> with the notation being that there was no overcurrent protection on the
> roof, i.e., no combiner box with separate fuses to protect each series
> string.  I'm going to try and educate our local authorities tomorrow on 
the
> lack of need for fuses on the roof with a cover letter of my own and a
> two-page letter that John Berdner of SMA-America has been kind enough to
> supply me with.  BUT....in case I don't prevail in my education process, 
I'm
> looking for a low cost plan B.  I know that I can get a 10-circuit 
combiner
> from Trace Tech. that's rated at the high DC voltage.  But I'd like to 
avoid
> spending $400 or more bucks for it.
>
> Any ideas?
>
> thanks,
> marco
>
> Marco Mangelsdorf, Ph.D.
> Marketing and Sales
> ProVision Technologies, Inc.
> 69 Railroad Avenue, Suite A-7
> Hilo, Hawaii 96720 USA
> (808) 969-3281, fax 934-7462
> www.provisiontechnologies.com
>
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