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: [email protected] [mailto:[email protected]] 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: [email protected] [mailto:[email protected]] 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
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