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<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=234010317-10012011>SMA now delivers large inverters that provide several
options for power factor correction provided by the output of the
inverter.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=234010317-10012011></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=234010317-10012011>So we are not talking about the viability of the
technology. There may still be a question of how well the technology is
implemented in this particular microinverter.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=234010317-10012011></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=234010317-10012011>The main question here is the efficacy of claims of an
advantage for small residential customers such that reduced PV array sizes
deliver equivalent energy as metered by the local
utility.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT color=#0000ff size=2 face=Arial><SPAN
class=234010317-10012011></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><SPAN class=234010317-10012011></SPAN><SPAN
class=234010317-10012011><FONT color=#0000ff size=2 face=Arial>Having followed
the the whole power factor correction device discussion, I still have some
question in my mind as to the resolution of the question of whether or
not standard residential utility meters will measure and accure a credit
for improved power factor.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=234010317-10012011></SPAN> <BR><SPAN
lang=en-us><FONT size=2 face=Arial>Mark Frye</FONT></SPAN> <BR><SPAN
lang=en-us><FONT size=2 face=Arial>Berkeley Solar Electric Systems</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>303 Redbud Way</FONT></SPAN>
<BR><SPAN lang=en-us><FONT size=2 face=Arial>Nevada City, CA
95959</FONT></SPAN> <BR><SPAN lang=en-us><FONT size=2 face=Arial>(530)
401-8024</FONT></SPAN> <BR><SPAN lang=en-us></SPAN><A
href="http://www.berkeleysolar.com/"><SPAN lang=en-us><U><FONT color=#0000ff
size=2 face=Arial>www.berkeleysolar.com</FONT></U></SPAN></A><SPAN
lang=en-us><FONT size=2 face=Arial> </FONT></SPAN> </DIV>
<DIV> </DIV><BR>
<DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B>On Behalf Of
</B>Exeltech<BR><B>Sent:</B> Monday, January 10, 2011 8:59 AM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches] Xslent?<BR></FONT><BR></DIV>
<DIV></DIV>
<TABLE border=0 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD vAlign=top>By the way, in answer to answer your original question,
capacitors of proper value, when installed in a circuit containing
inductive loads, are capable of allowing the circuit to attain a power
factor of 1.0. As part of our Underwriter's Laboratories testing for
our grid-tied inverters, a test fixture is used that's capable of both
inductive and capacitive reactance (it's part of the anti-islanding
tests). I've witnessed the power factor being adjusted from 0.7
leading and lagging to an absolute perfect 1.0000 (yes, four
decimals). It's all done by varying the value of capacitance in the
circuit. Thus, if one were to use lab-grade test equipment, and take
the time needed to make such a precision adjustment, it's possible to
achieve absolute unity in an inductive circuit by "tuning" it with a
capacitive circuit.<BR><BR><BR>Dan<BR> <BR><BR>--- On <B>Mon,
1/10/11, North Texas Renewable Energy Inc
<I><ntrei@1scom.net></I></B> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From:
North Texas Renewable Energy Inc <ntrei@1scom.net><BR>Subject: Re:
[RE-wrenches] Xslent?<BR>To: "RE-wrenches"
<re-wrenches@lists.re-wrenches.org><BR>Date: Monday, January 10,
2011, 8:29 AM<BR><BR>
<DIV id=yiv1864256617>
<DIV><SPAN class=yiv1864256617718422114-10012011><FONT face=Arial>How
efficient is a capacitor in offsetting the power factor error?
99.9%...<SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt"><SPAN>
</SPAN>±2%...?</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=yiv1864256617718422114-10012011><FONT face=Arial><SPAN
style="FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt">Jim
Duncan</SPAN></FONT></SPAN></DIV>
<BLOCKQUOTE>
<DIV dir=ltr class=yiv1864256617OutlookMessageHeader align=left><FONT
size=2 face=Tahoma>-----Original Message-----<BR><B>From:</B>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org]<B>On Behalf Of
</B>Exeltech<BR><B>Sent:</B> Sunday, January 09, 2011 9:03
PM<BR><B>To:</B> RE-wrenches<BR><B>Subject:</B> Re: [RE-wrenches]
Xslent?<BR><BR></FONT></DIV>
<TABLE border=0 cellSpacing=0 cellPadding=0>
<TBODY>
<TR>
<TD vAlign=top>--- On Fri, 1/7/11, Peter Parrish
<peter.parrish@calsolareng.com> wrote:<BR><BR>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">>
What ever is done to reduce the reative power, it has to be
done</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">> in
real time (with a fraction of 0.016 seconds, the 60 Hz
cycle).</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">>
You can’t wait until later in the evening to solve a problem
that</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">> is
occuring during the day.</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><BR></P>
<P class=yiv1864256617yiv1108495799MsoNormal>Peter is absolutely
correct. Power factor correction MUST occur on a
half-cycle by half-cycle basis, and at the exact moment of power
consumption by the reactive load. Anything else won't be
effective, and may in fact worsen the power factor at a given
point in the grid. <BR></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"><BR></SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">>
Real time compensation can be often done with capacitors
alone</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">> or
in conjuction with some smart electronics. Remember that
for</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">>
short periods of time capacitors can store considerable
amounts</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">> of
energy and can smooth out these reactive
currents.</SPAN></FONT></P>
<P class=yiv1864256617yiv1108495799MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"><BR></SPAN></FONT></P>Capacitors
placed across a power line will store energy for exactly
one-half cycle. At that point, the polarity reverses, the
capacitor is discharged to to zero, then recharged to the
opposite polarity. This process repeats every
cycle.<BR><BR>What DOES take place is a phase shift
(displacement) in the current flow relative to the voltage
waveform. Power factor correction is done with capacitor
banks (we see them in substations and on power poles) to offset
the power factor of the grid itself, which by its design is
inherently inductive due to long runs of wire. Very large
motors will have individual "tuning" capacitors installed to
offset inductive reactive current flow. These capacitors
are disconnected whenever the respective motor to which they're
connected is not in use. On occasion, excessive
capacitance exists in a circuit that must be offset by
inductance, but this is rare.<BR><BR><BR>Like Tom Cruise said in
Top Gun .. "It's
complicated."<BR><BR><BR>Dan<BR><BR><BR><BR><BR>--- On <B>Fri,
1/7/11, Peter Parrish
<I><peter.parrish@calsolareng.com></I></B> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From:
Peter Parrish
<peter.parrish@calsolareng.com><BR>Subject: Re:
[RE-wrenches] Xslent?<BR>To: "'RE-wrenches'"
<re-wrenches@lists.re-wrenches.org><BR>Date: Friday,
January 7, 2011, 5:39 PM<BR><BR>
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<DIV class=yiv1864256617yiv1501302192Section1>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">I
know only a little about Power Factor “charges”, but we can
figure out some other “engineering” issues.</SPAN></FONT></P>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">Power
Factor is a measure of the amount of reactive (out-of-phase)
power compared to real (in-phase) power. It is somewhat
complicated but the PF is unity for 100% in phase and 0 for
100% out-of-phase power. </SPAN></FONT></P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">The
important thing to remember is that (while holding the real
power constant) for PFs less than unity there is in addition
to the real power, and “in-flow” of power and an “outflow” of
power four times a cycle. One might say, “Why do I care about
reactive power? It flows in and out with no net contribution
over the long run!). True, but the in-flow and out-flow
represents higher currents on the lines and more<SPAN>
</SPAN>losses. Or it means that there have to be oversized
service conductors to avoid the extra losses. Even if the
losses are avoided, the higher currents can trip overcurrent
protection devices, and of course the utility company needs to
supply (and take back) the extra currents in real
time.</SPAN></FONT></P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">What
ever is done to reduce the reative power, it has to be done in
real time (with a fraction of 0.016 seconds, the 60 Hz cycle).
You can’t wait until later in the evening to solve a problem
that is occuring during the day.</SPAN></FONT></P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">Real
time compensation can be often done with capacitors alone or
in conjuction with some smart electronics. Remember that for
short periods of time capacitors can store considerable
amounts of energy and can smooth out these reactive
currents.</SPAN></FONT></P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">I can
well imagine how an inverter can be designed to generate both
real and reactive power, and therfore an inverter can reduce
the amount of reactive power that needs to be supplied by the
utility company – but not when the sun isn’t shining. I
suspect that these types of inverters will have oversized
output circuit wiring to handle the reactive currents without
adversely impacting their efficiency rating.
</SPAN></FONT></P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"></SPAN></FONT> </P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">If I
have time this weekend, I will take a look at Apparent’s
website.</SPAN></FONT></P>
<P><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt"><SPAN> </SPAN>-
Peter</SPAN></FONT></P>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=navy
size=2 face=Arial><SPAN
style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">Peter
T. Parrish, Ph.D., President<BR>California Solar Engineering,
Inc.<BR>820 Cynthia Ave. , Los Angeles , CA 90065<BR>CA Lic.
854779, NABCEP Cert. 031806-26<BR><A
rel=nofollow>peter.parrish@calsolareng.com</A><SPAN>
</SPAN><BR>Ph 323-258-8883, Mobile 323-839-6108, Fax
323-258-8885<SPAN> </SPAN></SPAN></FONT><FONT color=navy
size=2><SPAN
style="COLOR: navy; FONT-SIZE: 10pt"><SPAN> </SPAN></SPAN></FONT><FONT
color=navy size=1><SPAN
style="COLOR: navy; FONT-SIZE: 9pt"><SPAN> </SPAN></SPAN></FONT><FONT
color=navy><SPAN style="COLOR: navy"></SPAN></FONT></P>
<P><FONT color=navy size=2 face=Arial><SPAN
style="FONT-SIZE: 10pt"></SPAN></FONT><FONT color=black size=3
face="Times New Roman"><SPAN
style="FONT-FAMILY: 'Times New Roman'; COLOR: windowtext; FONT-SIZE: 12pt"></SPAN></FONT> </P></DIV>
<DIV>
<DIV style="TEXT-ALIGN: center"
class=yiv1864256617yiv1501302192MsoNormal align=center><FONT
size=3 face="Times New Roman"><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center SIZE=2 width="100%">
</SPAN></FONT></DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><B><FONT size=2
face=Tahoma><SPAN
style="FONT-FAMILY: Tahoma; FONT-SIZE: 10pt; FONT-WEIGHT: bold">From:</SPAN></FONT></B><FONT
size=2 face=Tahoma><SPAN
style="FONT-FAMILY: Tahoma; FONT-SIZE: 10pt">
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <B><SPAN
style="FONT-WEIGHT: bold">On Behalf Of </SPAN></B>Jamie
Johnson<BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B>
Friday, January 07, 2011 2:03 PM<BR><B><SPAN
style="FONT-WEIGHT: bold">To:</SPAN></B>
RE-wrenches<BR><B><SPAN
style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re:
[RE-wrenches] <SPAN
class=yiv1864256617yiv1501302192SpellE>Xslent</SPAN>?</SPAN></FONT></P></DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT size=3
face="Times New Roman"><SPAN
style="FONT-SIZE: 12pt"></SPAN></FONT> </P>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt">It's
an interesting product for a niche market if it actually
works as they say (<SPAN
class=yiv1864256617yiv1501302192SpellE>Disclaimer:I</SPAN> am
not claiming that it does), after speaking with an individual
who I believe is the VP of Production for Apparent
(use to work for <SPAN
class=yiv1864256617yiv1501302192SpellE>EnPhase</SPAN>
according to their website), he claims that the product is
currently installed at the Google campus on a
solar canopy for some of their EV chargers (can anyone verify
this?)</SPAN></FONT></P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt">They
have several other beta installs as well, however the
individual I spoke to said they were only installing small
systems at beta test sites (where the <SPAN
class=yiv1864256617yiv1501302192SpellE>Util</SPAN> co charges
for VAR's using separate meters like for EV
charging) for now. No pricing has been set for the
inverters, and they are not available for sale to installers
yet.</SPAN></FONT></P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt">Apparently
they claim the inverter can create/produce VAR's by
taking 1 watt of power from the grid at night or from the
solar output during the day and turning it into
approximately 9 VAR's to offset the customers charges
for VAR usage from the Grid. This is where the
<SPAN class=yiv1864256617yiv1501302192SpellE>KVAh</SPAN>
production on the graph before sunrise and after sunset
comes from.</SPAN></FONT></P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt">I
still would need to see a third party head to head comparison
test before I believed it. Again niche market inverter
for when the utility co charges for
VAR's.</SPAN></FONT></P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt">Jamie</SPAN></FONT></P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<DIV>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT color=black
size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt"></SPAN></FONT> </P></DIV>
<BLOCKQUOTE
style="BORDER-BOTTOM: medium none; BORDER-LEFT: 1pt solid; PADDING-BOTTOM: 0in; MARGIN-TOP: 5pt; PADDING-LEFT: 4pt; PADDING-RIGHT: 0in; MARGIN-BOTTOM: 5pt; MARGIN-LEFT: 4.15pt; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in"
id=yiv1864256617yiv1501302192replyBlockquote>
<DIV id=yiv1864256617yiv1501302192wmQuoteWrapper>
<P class=yiv1864256617yiv1501302192MsoNormal><FONT
color=black size=2 face=Verdana><SPAN
style="FONT-FAMILY: Verdana; COLOR: black; FONT-SIZE: 10pt">--------
Original Message --------<BR>Subject: Re: [RE-wrenches]
<SPAN
class=yiv1864256617yiv1501302192SpellE>Xslent</SPAN>?<BR>From:
August Goers <<A
rel=nofollow>august@luminalt.com</A>><BR>Date: Fri,
January 07, 2011 10:24 am<BR>To: RE-wrenches <<A
rel=nofollow>re-wrenches@lists.re-wrenches.org</A>><BR><BR>Hi
All -<BR><BR>Thanks for the helpful info! We did a little
more research on our end and<BR>I guess Apparent is the new
brand name for the <SPAN
class=yiv1864256617yiv1501302192SpellE>Xslent</SPAN>
product. What<BR>baffles me is the chart where they show
that they're producing power<BR>before and after sunrise and
sunset:<BR><BR><A
href="http://www.apparent.com/products/mgi.html"
rel=nofollow
target=_blank>http://www.apparent.com/products/mgi.html</A><BR><BR>The
system must include batteries? Someone on their marketing
team is<BR>really going to town...<BR><BR>Best,
August<BR><BR>-----Original Message-----<BR>From: <A
rel=nofollow>re-wrenches-bounces@lists.re-wrenches.org</A><BR>[<A
rel=nofollow>mailto:re-wrenches-bounces@lists.re-wrenches.org</A>]
On Behalf Of jay <SPAN
class=yiv1864256617yiv1501302192SpellE>peltz</SPAN><BR>Sent:
Thursday, January 06, 2011 4:43 PM<BR>To:
RE-wrenches<BR>Subject: Re: [RE-wrenches] <SPAN
class=yiv1864256617yiv1501302192SpellE>Xslent</SPAN>?<BR><BR>HI
Peter,<BR><BR>I agree with you that for now on residential
it makes no sense.<BR>However for commercial that might have
to pay extra for PF issues, to have<BR>the inverter adjust
for this makes sense.<BR>Its the reason they( inverter
companies ) are doing it.<BR><SPAN
class=yiv1864256617yiv1501302192SpellE>I"ve</SPAN> heard a
better more complete reason of course from Bill Brooks,
who<BR>maybe can chime in.<BR><BR>sorry got away from
me,<BR><BR><BR>jay<BR><SPAN
class=yiv1864256617yiv1501302192SpellE>peltz</SPAN>
power<BR>On Jan 6, 2011, at 2:34 PM, Peter Parrish
wrote:<BR><BR>> I can't understand how any inverter
WOULDN'T deliver its power with the<BR>> voltage and
current 100% IN PHASE.<BR>><BR>> When the voltage and
current are not 100% in-phase that
represents<BR>reactive<BR>> power. Reactive power flows
positive for a quarter of the AC cycle, then<BR>>
negative for a quarter of a cycle, then positive and then
negative. The<BR>net<BR>> result over one AC cycle is
ZERO power delivered to the load.<BR>><BR>> So
reactive power is worthless.<BR>><BR>> Worse, it
results in higher currents (and voltages) for the same
amount<BR>of<BR>> in-phase power, putting additional
stress on circuits.<BR>><BR>> -
Peter<BR>><BR>><BR>> Peter T. Parrish, Ph.D.,
President<BR>> California Solar Engineering, Inc.<BR>>
820 Cynthia Ave. , Los Angeles , CA 90065<BR>> CA <SPAN
class=yiv1864256617yiv1501302192SpellE>Lic</SPAN>. 854779,
NABCEP Cert. 031806-26<BR>> <A
rel=nofollow>peter.parrish@calsolareng.com</A><BR>> Ph
323-258-8883, Mobile 323-839-6108, Fax
323-258-8885<BR>><BR><BR>_______________________________________________<BR><BR>_______________________________________________</SPAN></FONT></P></DIV></BLOCKQUOTE></DIV></DIV><BR>-----Inline
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