Jason,
Would a 96 cell Panasonic module fit in the space you have available? It
would give you sufficient voltage to charge this battery.
Kent Osterberg
Blue Mountain Solar
On 4/12/2021 10:40 AM, Jason Szumlanski 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
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