<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">I saw solar charge controller that boosts the voltage to allow a 60-cell module to charge a 48V nominal battery, like in a golf cart to Lithium conversion. I think it was a Genasun GVB-8PB-48V-WP. I\u2019m guessing there is a 72-cell version. <div><br></div><div><br><div dir="ltr">Thank you,<div><br></div><div>Maverick</div><div><br></div></div><div dir="ltr"><br><blockquote type="cite">On Apr 12, 2021, at 12:43 PM, Jason Szumlanski <jason@floridasolardesigngroup.com> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"></div><div dir="auto"><div class="gmail_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="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_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="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_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="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Thanks in advance,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Jason Szumlanski</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Florida Solar Design Group</div></div>
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