<html><head></head><body><div class="ydp5ed6534byahoo-style-wrap" style="font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:16px;"><div><div dir="ltr" data-setdir="false">I second the Genasun product line. I've done a few golf cart charging systems. works like a charm. </div><div><br></div><div class="ydp5ed6534bsignature">-Wes Kennedy
303-653-3073</div></div>
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On Monday, April 12, 2021, 12:03:52 PM MDT, Mac Lewis <maclewis1@gmail.com> wrote:
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<div><div id="ydpef869893yiv1298999673"><div><div dir="ltr">There is a company called Genasun that I believe makes a boost solar charge controller to do this. They are in the marine world and I haven't poured over their specs but they are worth checking out. <div><br clear="none"></div><div>Try looking at </div><h1 class="ydpef869893yiv1298999673gmail-product_title ydpef869893yiv1298999673entry-title" style="border:0px;font-weight:normal;font-stretch:normal;line-height:1.4em;font-family:Ubuntu, sans-serif;margin:0px;outline:0px;padding:0px;vertical-align:baseline;color:rgb(27,30,31);letter-spacing:-1px;clear:none;"><font size="2">Genasun GVB-8-Li</font></h1><div><div>Good Luck!</div><div><br clear="none"></div></div></div><br clear="none"><div class="ydpef869893yiv1298999673gmail_quote"><div class="ydpef869893yiv1298999673yqt6441577133" id="ydpef869893yiv1298999673yqt01401"><div class="ydpef869893yiv1298999673gmail_attr" dir="ltr">On Mon, Apr 12, 2021 at 11:43 AM Jason Szumlanski <<a shape="rect" href="mailto:jason@floridasolardesigngroup.com" target="_blank" rel="noreferrer noopener">jason@floridasolardesigngroup.com</a>> wrote:<br clear="none"></div><blockquote class="ydpef869893yiv1298999673gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div dir="ltr"><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;"></div><div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;">I want to charge a 51.2V LiPO battery with a single 420W 72-cell module. Vmp is 40.14V. </div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;"><br clear="none"></div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;">It's one of those situations where I just need a lot of battery capacity as a backup for a specified time period, but it doesn't matter how long it takes to charge it back up. And I have space for exactly one 72-cell module.</div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;"><br clear="none"></div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;">It's going to be a Victron inverter. I'm not sure if they make a DC-DC solution for this charging scenario or if there is another way to accomplish it without too much cost and complexity. I was half-heartedly thinking about an AC coupled microinverter, but that has drawbacks in terms of efficiency I think. Maybe that's not any worse than DC-DC conversion - I'm not sure. AC Coupling would probably be cheaper and easier. Monitoring might be difficult/limited. And AC coupling would require that the inverter be on (inverting) which isn't ideal for this situation either.</div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;"><br clear="none"></div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;">Thanks in advance,</div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;"><br clear="none"></div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;">Jason Szumlanski</div><div class="ydpef869893yiv1298999673gmail_default" style="font-family:arial, helvetica, sans-serif;">Florida Solar Design Group</div></div>
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</blockquote></div></div><br clear="all"><div><br clear="none"></div>-- <br clear="none"><div class="ydpef869893yiv1298999673gmail_signature" dir="ltr"><div><br clear="none"></div><div><font color="#305A78" face="'times new roman', serif"><br clear="none"></font></div><div><br clear="none"></div>Mac Lewis<br clear="none"><br clear="none"><span style="font-family:New;font-size:medium;color:rgb(255,153,0);"><b><font face="Arial, Helvetica, sans-serif" size="3"></font></b></span><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small;"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120);"><font face="'times new roman', serif" style="background-color: inherit;">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104);"><font face="'times new roman', serif" style="background-color: inherit;">-Sócrates</font></span></span></span></font></p></div>
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