[DisasterRadio] MPPT / Solar

[Morgan Allen]

I got 4 of these last week. I've got one board setup to do some testing.
Basic setup is ESP32 with....
10k/10k voltage divider on battery (tested, working)
2k/12k voltage divider on the 12v solar cell (not tested yet)

To start I'm just going to do some basic monitoring/logging, I also have
some ASC714 current sensors I thought I might add in.
If anyone can think of some specific tests to do let me know. Mostly I got
these to get some monitoring infrastructure in place for some
other solar projects.


On Thu, Feb 6, 2020 at 8:20 AM <samuk at disroot.org> wrote:

> I spotted this LifePO4 module, the schematic and BOM are CC-BY-SA
>
> https://hackaday.io/project/13260-lifepo4weredsolar1
>
> Thanks
>
> Sam
>
> January 17, 2020 11:09 AM, "Marc Juul" <marc at juul.io> wrote:
>
> > On 1/16/20, samuk at disroot.org <samuk at disroot.org> wrote:
> >
> >> Hi all
> >>
> >> I've been looking into solar a bit, in the process, I came across this
> MPPT:
> >> https://www.aliexpress.com/item/4000031728632.html
> >
> > Yeah that's the Waveshare module. Unfortunately it uses the CN3791
> > which is what we used on the previous disaster.radio prototype. It is
> > not true MPPT and does did not perform well. It is super cheap though
> > (less than 50 cents I believe). I think this one is probably decent:
> >
> > https://www.sparkfun.com/products/12885
> >
> > but it has to be modified to support the full 2A and they didn't break
> > out the temperature sensor pin.
> >
> > We just started working on our own MPPT module but that will take a
> > while. You could also try to modify Elektra's ESP32 based module for
> > Li-ion operation:
> >
> >
> https://media.ccc.de/v/36c3-oio-166-ff-esp32-openmppt-new-freifunk-isems-mppt-solar-controller-with-
> > ntegrated-wifi
> >
> > --
> > marc/juul
> _______________________________________________
> DisasterRadio mailing list
> DisasterRadio at lists.sudoroom.org
> https://sudoroom.org/lists/listinfo/disasterradio
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sudoroom.org/pipermail/disasterradio/attachments/20200206/a3b63441/attachment.html>