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Todd is correct. This solution is simple and works. You'll still
want a switch or breaker on the input.<br>
Allan<br>
<br>
<div class="moz-cite-prefix">On 12/19/2022 9:13 AM, Todd Cory via
RE-wrenches wrote:<br>
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<p style="margin:0;padding:0;font-family: georgia; font-size:
18pt; overflow-wrap: break-word;">If the grid is wired to AC2,
then the inverter can charge off off that source but not sell
to it.<br>
Todd</p>
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<div class="gmail_attr" dir="ltr">On Mon, Dec 19, 2022
at 8:21 AM David Palumbo via RE-wrenches <<a
class="moz-txt-link-freetext"
href="mailto:re-wrenches@lists.re-wrenches.org"
moz-do-not-send="true">re-wrenches@lists.re-wrenches.org</a>>
wrote:</div>
<blockquote class="gmail_quote" style="margin: 0px 0px
0px 0.8ex; border-left: 1px solid #cccccc;
padding-left: 1ex;">
<div class="msg-1280084792146238715">
<div class="" style="overflow-wrap: break-word;"
lang="EN-US">
<div class="m_-1280084792146238715WordSection1">
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">Wrenches,</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">I have been retired
from doing solar installs for 10 years now
and I am reaching out for help as to
recommending a solution to an old
do-it-yourself customers question.</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">His solar system
that was formerly off-grid and is now
using grid power instead of a back up
generator. </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">He had/has no
intention of doing a net-metered system.
Just trying to reduce dependance on a
fossil fuel genset during our mostly
sunless Vermont winters. </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;"> </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">He says that he
brought in power a few years ago to run
their expanding maple sugaring operation
located next to their house. At that time
they ran a 115Vac circuit (grid power)
over to their house and connected grid
power into AC Hot In terminal #! in their
Trace SW 2512. This is correct as I see
terminal #2 is labeled for generator
power. </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">He has the Trace
programmed for float mode not sell mode.</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;"> </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">Their local utility
was working on the line nearby on the main
road and noticed a small amount of current
flowing into the grid and figured out
where it was coming from. The utility did
not immediately shut him down. Just told
him to correct the problem. He is asking
me for advice.</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;"> </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">My first
inclination is to separate the grid power
completely from the inverter power and to
feed both power sources into a double pole
double throw transfer switch. What other
options should be considered. </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;"> </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">Thanks in advance
and happy holidays,</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;"> </span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">Dave Palumbo</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">Formerly >
Independent Power & Light</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">Hyde Park, VT</span></p>
<p class="MsoNormal"
style="margin:0;padding:0;font-family:
georgia; font-size: 18pt; overflow-wrap:
break-word;"><span class=""
style="font-size: 10pt; font-family:
Helvetica,sans-serif;">802-371-8678 voice
or text</span></p>
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