[RE-wrenches] combiner bus bar for Sunny Tower DC input?

[Glenn Burt]

Are you sure you need to split them?

IIR, there are only a pair of conductors going from each SB into the tower.
They must be combined on the SMA side of the touch-safe fuse holders in some
way.

 

We opted to run all our source circuits from array through 6 external discos
then into the ST instead of combining them - the distance in our case was
around 150'.

 

-Glenn

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kirk
Herander
Sent: Tuesday, November 15, 2011 8:10 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] combiner bus bar for Sunny Tower DC input?

 

But I don't believe the Sunny Tower internally  has single conductor lugs
leading to the respective SB it's wired to. The DC tower input/output to
each respective inverter is effectively a combiner box which combines all
fused inputs to a single positive prewired to the respective SB inverter. I
have already combined the strings in an external box and need to "uncombine"
them through the individual fused strings in the SunnyTower.

 

Kirk Herander

VT Solar, LLC

dba Vermont Solar Engineering

NABCEPTM Certified installer Charter Member

NYSERDA-eligible Installer

VT RE Incentive Program Partner

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Brian
Teitelbaum
Sent: Monday, November 14, 2011 8:28 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] combiner bus bar for Sunny Tower DC input?

 

Hi Kirk,

 

The Sunny Boy inverters also have a pair of lugs for a single conductor pair
coming in from the array. They are meant to be used if you have an external
combiner. No bus bars as you describe are needed.

 

Brian Teitelbaum

AEE Solar

 

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kirk
Herander
Sent: Monday, November 14, 2011 2:57 PM
To: RE-wrenches
Subject: [RE-wrenches] combiner bus bar for Sunny Tower DC input?

 

Hello,

 

The Sunny Tower has four individual fuse holders on the DC input of each
inverter. I am combining the array output for each inverter in a combiner
box before the tower, so there is only a single positive, negative, and gnd
going to each inverter's DC input. I want to fan this input out to each of
the four dc fuses via a combiner bus with a single lug and prongs which fit
directly into each fuseholders' input, ala the Outback combiner bus. Is
there something similar made for the SunnyTower dc input? I have not been
able to talk to SMA yet about this. Thanks.

 

Kirk Herander

VT Solar, LLC

dba Vermont Solar Engineering

NABCEPTM Certified installer Charter Member

NYSERDA-eligible Installer

VT RE Incentive Program Partner

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20111115/c724dcac/attachment-0003.html>