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.
Try looking at Genasun GVB-8-Li Good Luck! On Mon, Apr 12, 2021 at 11:43 AM Jason Szumlanski < ja...@floridasolardesigngroup.com> wrote: > I want to charge a 51.2V LiPO battery with a single 420W 72-cell module. > Vmp is 40.14V. > > 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. > > 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. > > Thanks in advance, > > Jason Szumlanski > Florida Solar Design Group > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > -- Mac Lewis *"Yo solo sé que no sé nada." -Sócrates*
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