[RE-wrenches] Charging 48V Battery with One Module

[Kent Osterberg]

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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