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<p class=MsoNormal>We have a new (for us) application for grid connected net-metered
PV with battery back-up as follows. The twist is that the entire load center in
the house will be the “protected loads panel”. <o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>5kW PV ground mount located 250 feet East of their barn.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Will utilize AC Coupled SB5000US inverter to (2)Sunny
Island 5048’s for 120/240VAC back-up capability with 24.5kWh back-up
battery bank. All inverters/batteries to be located in barn.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Barn has 200A service from grid (PV system AC point of
connection will be there), <b>house is located 175 feet West of barn</b> and
has a 100A load center (sub panel from barn).<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Intention is to back up house as the protected loads panel
fed by the Sunny Islands in case of grid failure. <o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>The Sunny Islands will be able to pass through up to 56
Amps at 240VAC. <o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span
style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>I want to supply the 100A house load center with up to
100A during normal operation with grid available. I am proposing to use an
automatic contactor/transfer switch to feed the 100A house load center. Normally
Closed contacts from grid power, N.O. contacts fed by Sunny Island. Therefore
normal operation will be for grid to be connected directly to house 100A load
center and under grid failure the transfer switch will connect the Sunny
Islands to power the 100A house load center. Under grid failure condition we
will have an LED signal light come on to warn the homeowners that they are on
battery power.<o:p></o:p></p>
<p class=MsoNormal>Questions for wrenches: <o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>1)<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Is that whole thing a viable idea?<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>2)<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>100 Amp automatic transfer switch recommendations?<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l1 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>3)<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>LED signal light recommendations? Or is there
another method to warn homeowner of grid down status?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Dave<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>David Palumbo, NABCEP Certified PV Installer<o:p></o:p></p>
<p class=MsoNormal>Independent Power LLC<o:p></o:p></p>
<p class=MsoNormal>Offices in Lamoille and the Champlain Valley<o:p></o:p></p>
<p class=MsoNormal>802.888.7194 <o:p></o:p></p>
<p class=MsoNormal>www.independentpowerllc.com <o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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