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

[William Miller]

Kirk:

This sounds like a bad idea:  Combing PV strings and then splitting them 
and recombining them (what you essentially described, if I 
understand).  You need to bypass the built in fuses.  Never having done 
this, I can't offer advice on how to do so, but I am pretty sure your plan 
is flawed.  Questions arise, such as:  Will you be installing fuses in the 
built in holders?  If so, how do you know they will evenly divide the current?

William



At 02:56 PM 11/14/2011, you wrote:
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>Content-Language: en-us
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>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
>
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Miller Solar
Voice :805-438-5600
email: william at millersolar.com
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