<div dir="ltr">Thanks, I was thinking about using LBX, but the customer is really not too excited about it. And based on the manual, Energy Management Mode seems like it fits the bill, but it doesn't seem to be going back into stand-alone/inverter mode when the timer is supossed to turn off.</div>
<div class="gmail_extra"><br clear="all"><div><div dir="ltr"><div><br></div><div>Brian Mehalic <br>NABCEP Certified Solar PV Installation Professional™ R031508-59<div>IREC ISPQ Certified Affiliated Instructor/PV US-0132<br>
<div><br></div><div>PV Curriculum Developer and Instructor<div>Solar Energy International<br><a href="http://www.solarenergy.org" target="_blank">http://www.solarenergy.org</a></div></div></div></div></div></div>
<br><br><div class="gmail_quote">On Fri, Oct 4, 2013 at 3:42 PM, <span dir="ltr"><<a href="mailto:Eric.Bentsen@schneider-electric.com" target="_blank">Eric.Bentsen@schneider-electric.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br><font face="sans-serif">Hi Brian,</font>
<br><font face="sans-serif">LBX would be better for the way this
customer is using the system, because it only connects</font>
<br><font face="sans-serif"> to the grid when the batteries
get low. Unfortunately, the timers do not affect LBX, so charging </font>
<br><font face="sans-serif">may occur during the peak rate....or
it may not :C)</font>
<br>
<br><font face="sans-serif">Rgds,</font>
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Schneider Electric </b></font><font size="1" face="Arial"><b> | Solar
Business</b> | <b>UNITED STATES</b> | <b>Technical
Support Representative</b> <b><br>
Phone:</b> +(650) 351-8237 ext. 001# | <b><br>
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<table width="100%">
<tbody><tr valign="top">
<td><font size="1" color="#5f5f5f" face="sans-serif">From:</font>
</td><td><font size="1" face="sans-serif">Brian Mehalic <<a href="mailto:brian@solarenergy.org" target="_blank">brian@solarenergy.org</a>></font>
</td></tr><tr valign="top">
<td><font size="1" color="#5f5f5f" face="sans-serif">To:</font>
</td><td><font size="1" face="sans-serif">RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>></font>
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<td><font size="1" color="#5f5f5f" face="sans-serif">Date:</font>
</td><td><font size="1" face="sans-serif">10/04/2013 12:04 PM</font>
</td></tr><tr valign="top">
<td><font size="1" color="#5f5f5f" face="sans-serif">Subject:</font>
</td><td><font size="1" face="sans-serif">[RE-wrenches] Trace SWs in Energy Management
Mode</font>
</td></tr><tr valign="top">
<td><font size="1" color="#5f5f5f" face="sans-serif">Sent by:</font>
</td><td><font size="1" face="sans-serif"><a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a></font></td></tr></tbody></table>
<br>
<hr noshade><div><div class="h5">
<br>
<br>
<br><font size="3">Have a friend that is on an electric co-op where peak
$/kWh is 4x the off-peak rate. Peak hours are 6-10 am in the winter
and 12-6 pm in the summer.</font>
<br>
<br><font size="3">He has relocated an older system from his previous house
to his new one; circuits were separated out to sub-panel that is connected
to the inverter AC output. The reinstallation is very professional.</font>
<br>
<br><font size="3">Two Trace SW4024 in series (04/96)</font>
<br><font size="3">120/240 Vac Grid connected to AC1 of each inverter</font>
<br><font size="3">575 Ah battery bank</font>
<br><font size="3">Two C40s with digital displays, ~ 4.5 kW STC array total</font>
<br><font size="3">Trimetric</font>
<br>
<br><font size="3">The goal is to not use any utility energy during peak
times, unless the low battery voltage setting is reached, and in general
to run as an off-grid system, minimizing charge time from the grid during
off-peak hours as well. The assumption (I know it's a tough one,
but I'm coming in after the transition) is that the PV array should at
least be able to provide the bulk of the load; using the grid to charge
the batteries to ensure they are regularly filled and to maximize their
life expectancy. The customer is also managing loads actively.</font>
<br>
<br><font size="3">It's been a few years, but I used to work on these all
the time; however it was usually off-grid with a genset, or fixing poorly
maintained Y2K systems which were always in float. I'm attempting to use
the energy management mode.</font>
<br>
<br><font size="3">Inverter settings:</font>
<br><font size="3">Clocks: Time is accurate</font>
<br><font size="3">Grid AC1 amps AC: 60</font>
<br><font size="3">Max charge amps AC: 10 (each inverter)</font>
<br>
<br><font size="3">Grid usage: FLT</font>
<br><font size="3">Set start charge time: 23:00</font>
<br><font size="3">Start bulk time: 23:10</font>
<br><font size="3">Set end charge time: 05:00</font>
<br><font size="3">Set float volts DC: 25.4</font>
<br><font size="3">Bulk volts DC: 28.8</font>
<br><font size="3">Absorb time: 1.5 hours</font>
<br><font size="3">Low battery cut-out: 22 </font>
<br><font size="3">Low battery cut-in: 25.4</font>
<br>
<br><font size="3">Okay, programmed the system, both inverters are inverting,
AC1 is blinking green, looks good. Then a well pump kicks on, registers
70 A DC on the Trimetric. This causes inverter 1 to go into bulk
charging and pass through about 10 additional amps from the grid to the
load (inverter 2 continued to inverter about 10 amps for the load). Inverter
1 soon cycled into float, then went back to what invertering (amber light)
and green blinking AC1 (which is what I want it to be at). </font>
<br>
<br><font size="3">Had to leave, both the customer and I had other obligations.</font>
<br>
<br><font size="3">He took a picture of the inverter sat 11:15 pm, and they
were in bulk, battery voltage rising...exactly as planned. But then
in the next set of pictures, taken at 7 am, after the end of the charge
time, they were in float, not inverting, even though, based on the Trimetric
readings at 11 (64%, 85A charging), and the fact that charging would have
been active all night, they were not in anyway at a low voltage condition
(Trimetric readings am readings were 85%, trickle charge, 25.6 V).</font>
<br>
<br><font size="3">Something seems amiss. Any suggestions or insight?</font>
<br>
<br><font size="3">Thanks!</font>
<br>
<br><font size="3">Brian Mehalic <br>
NABCEP Certified Solar PV Installation Professional™ R031508-59</font>
<br><font size="3">IREC ISPQ Certified Affiliated Instructor/PV US-0132</font>
<br>
<br><font size="3">PV Curriculum Developer and Instructor</font>
<br><font size="3">Solar Energy International</font><font size="3" color="blue"><u><br>
</u></font><a href="http://www.solarenergy.org/" target="_blank"><font size="3" color="blue"><u>http://www.solarenergy.org</u></font></a>
<br></div></div><font size="3"><br>
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