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@juul.io> wrote:

> On 1/16/20, samuk@disroot.org <samuk@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
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