<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Cambria;
panose-1:2 4 5 3 5 4 6 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1650014747;
mso-list-type:hybrid;
mso-list-template-ids:-1284861168 -1 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;}
@list l0:level1
{mso-level-start-at:0;
mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Calibri",sans-serif;
mso-fareast-font-family:"Times New Roman";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;
font-family:Wingdings;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Thanks Bill, and everyone else:</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When I was a CA solar contractor, I designed and oversaw the installation of over 20 \u201cgrid-tied battery back up systems\u201d. I now have an approved application into the Southern California Edison SGIP program, spec\u2019ing a 16 kWh and 8 kW \u201csmart\u201d e-storage system. The system will use Li-ion batteries (the exact manu and chemistry escapes me right now).</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I don\u2019t quite understand the relative lack of traction regarding Li for small scale remote/recreational applications. I understand a little about BMS, enough to be dangerous. So perhaps the biggest question I have is why NOT design-in a Li battery system as long as it come wrapped with a BSM? </p><p class=MsoNormal>Any brands/technologies recommended?</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Also thanks for the info on 36 cell vs. 60 cell PV modules. If I were to specify a system from scratch (and that is the direction I\u2019m heading), I would go with 60 cell modules (even 72 cell modules) and a MPPT CC that can handle the voltage and current range.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>And thanks for the recommendation on AC vs DC powered refrigerators. I don\u2019t want to handle the service call!</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks to everyone for their input.</p><p class=MsoNormal><o:p> </o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Peter</li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Peter T. Parrish<br>SolarGnosis<br>1107 Fair Oaks Ave. Ste. 351<br>South Pasadena, CA 91030<br>(323) 839-6108<br>peter.parrish@solargnosis.com</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:wmdorsett@sbcglobal.net">William Dorsett</a><br><b>Sent: </b>Sunday, December 9, 2018 10:56 PM<br><b>To: </b><a href="mailto:re-wrenches@lists.re-wrenches.org">'RE-wrenches'</a><br><b>Subject: </b>Re: [RE-wrenches] Portable Power Centers</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='line-height:20.0pt;background:white'><span style='font-size:14.0pt;font-family:"Cambria",serif;color:#1F497D'>Especially for this group of people, who are used to making do with resources as they come, there was a very interesting concept article in HomePower, </span><span style='font-size:14.0pt;font-family:"Cambria",serif;color:black'>Issue #186, July / August 2018, called DayLight Drive by </span><span style='font-size:14.0pt;font-family:"Cambria",serif;color:black'>Alexis Zeigler \u2022 Living Energy Farm, Louisa, Virginia. <a href="https://www.homepower.com/articles/solar-electricity/equipment-products/mailbox-daylight-drive">https://www.homepower.com/articles/solar-electricity/equipment-products/mailbox-daylight-drive</a> The concept is in minimizing the expense of battery storage by using sun\u2026 well \u201cDayLight\u201d as it happens. I think the concept is particularly relevant to situations like you are describing and in developing countries. But also more to us as we look to the role of storage in general. Thanks for the thoughts, Alexis.</span><span style='font-size:14.0pt;font-family:"Cambria",serif;color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Cambria",serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Cambria",serif;color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'>Bill Dorsett<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'>Flint Hills Renewable Energy & Efficiency Cooperative, Inc.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'> </span><span style='font-size:14.0pt;color:#76923C'>\u201cStart where you are. Use what you have. Do what you can\u201d </span><span style='font-size:10.0pt;color:#76923C'>Arthur Ashe</span><span style='font-size:14.0pt;color:#76923C'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'>1715 Leavenworth<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'>Manhattan, KS 66502<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'><a href="http://www.fhreec.org/">www.fhreec.org</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'>785/539-1956 Office <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'>785/564-2583 Cell<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;color:#1F497D'><a href="mailto:wmdorsett@cox.net">wmdorsett@cox.net</a> <o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Cambria",serif;color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> <b>On Behalf Of </b>Peter Parrish<br><b>Sent:</b> Saturday, December 08, 2018 5:27 PM<br><b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b>Subject:</b> [RE-wrenches] Portable Power Centers<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are working with Turning Point Foundation a 501(c)3 to provide off-grid power for their River Haven project which is providing transitional housing for homeless folks in the Ventura CA area.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The site is truly off-grid and currently uses propane to power three refrigerators and cook stoves. There is no space heating for the single occupancy rooms as of yet. But that\u2019s another problem.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are looking to specify DC refrigerators and PV-powered battery storage for the River Haven project. We are looking at the Goal Zero Yeti-3000 system (3000 Whr, 500 full discharge cycles, to 80% residual capacity) at a sale price of $2,400 but are finding the extra cost of their PV modules quite steep. And looking at other 36-cell (12 volt) modules, I can\u2019t find anything for less than $1.10/W. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Since Goal Zero is looking at the recreational market, I thought that there might be other companies with comparable product offerings that are focusing on other markets like developing countries.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any advice would be appreciated and you may contact us off-line.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Peter T. Parrish<br>SolarGnosis<br>1107 Fair Oaks Ave. Ste. 351<br>South Pasadena, CA 91030<br>(323) 839-6108<br><a href="mailto:peter.parrish@solargnosis.com">peter.parrish@solargnosis.com</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>