<div dir="ltr">boB,<div><br></div><div>I see and understand the functionality of the input-output bypass switch (breakers). The other breaker labeled "Sunny Boy(s) Input" in the drawing and labeled "Grid Tie Inverter" on the unit, seems to provide a single OCPD for the combined input of the two inverters. The SB 5000 has a maximum output current of 22A and the SB3000 a 15A max output. Seems we should have output breakers on each inverter circuit prior to connection to the SMA E-panel busbar.</div>
<div><br></div><div>It seems there are a couple of options.</div><div>1) A small AC combiner panel with a suitably sizedbreaker protecting each inverter and #6 conductors run from the AC combiner to the SunnyBoy input bus bar in the E-panel. The 60A OCPD ("grid Tie Inverter") in the E-panel protecting this circuit.</div>
<div>2) Two suitably sized AC breakers installed on the extra DIN rail on the right hand side of the E-panel and output of these breakers feeding the busbar.</div><div>3) Run #6 conductors from the E-Panel Sunny Boy Input Busbars back to each inverter output circuit, and let the 60A "Sunny Boy(s) Input" breaker provide the OCPD for both inverters. Not sure this option passes muster with a single OCPD protecting two devices.</div>
<div><br></div><div>I hope that clarifies the question.</div><div class="gmail_extra"><br>Thanks</div><div class="gmail_extra">Carl</div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 16, 2013 at 4:32 PM, <a href="mailto:boB@midnitesolar.com">boB@midnitesolar.com</a> <span dir="ltr"><<a href="mailto:boB@midnitesolar.com" target="_blank">boB@midnitesolar.com</a>></span> wrote:<br>
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Carl, there are actually 2 (two) Sunny Island AC load output
breakers.<br>
One set is in the AC input-output bypass switch and the other are<br>
separate breakers so you can turn off the inverter output.<br>
<br>
The Sunny Boy outputs also go through a 2-pole circuit breaker.<br>
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What OCPD are you referring to ?<span class="HOEnZb"><font color="#888888"><br>
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boB</font></span><div><div class="h5"><br>
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On 9/16/2013 12:31 PM, Carl Adams wrote:<br>
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<div dir="ltr">Hello Wrenches,
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<div>We are installing our first Midnite Solar E-panel for SMA.
The epanel has a bus bar for landing the inverter output
circuits. The attached diagram from Midnite does not include
any OCPD in the circuit, but it seems to me these will be
required . We'll be installing an SMA SB3000TL and SB5000TL.
Have any of you installed this SMA E-Panel configuration
before and if so how did you handle this piece of it?
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<div>Thanks in Advance</div>
<div>Carl Adams</div>
<div>SunRock Solar</div>
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