bigclive
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Slightly perplexing solar MPPT lithium charger
🕑 Added 2024-04-26 23:58:01 +0000 UTCI think they've really just thrown the acronym MPPT into the mix as a stunt here, as I don't really see how this chip can actually do that.
I'll have to do some side by side tests between this module and a classic TP4056 one.
Comments
Muxer Baker
I've tried the TP4056 as a solar charger. It was in Ireland, the fluctuation on the input voltage as clouds went over etc drove it mad. The charge indicators would do wild things. It would just then crash. Plenty of YouTube videos saying to do it, but it doesn't work. This was for a 6V6A array I set up for my garden lights. I ended up just using DW01As and then a bunch of 18650s in parallel to try and get the termination voltage as high as possible. Worked perfectly.
Charles
The manufacturer appears to have another model that actually does do MPPT, and for which the output voltage in the constant-voltage phase can be adjusted up OR down - and up high enough to charge multiple cells in series. It's the CN3722. http://www.consonance-elec.com/en/static/upload/file/20231218/1702868102946736.pdf
