On 9/3/2019 2:38 PM, Bob Conder via Elecraft wrote:
Lithium, as I understand Lithium is very difficult to charge by solar.
Not if you have the right charge controller and the right Lithium
chemistry. Buy a battery from these guys. Good folks, show up at major
hamfests/conventions.
https://www.bioennopower.com/collections/12v-series-lifepo4-batteries
Buy this solar charge controller -- it's the only MPPT controller I know
of that is RF quiet. Make sure you get the one for LiFePO4.
https://www.amazon.com/Genasun-GV-5-Li-14-2V-Controller-Lithium-Batteries/dp/B01N9BP7VL/ref=asc_df_B01N9BP7VL/?tag=hyprod-20&linkCode=df0&hvadid=198064505516&hvpos=1o1&hvnetw=g&hvrand=15451059233750887838&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9032155&hvtargid=pla-349256761369&psc=1
I charge my LiFePO4 batteries from AC using the power supply for an old
laptop, connecting it to the controller in place of the solar panel. If
you don't have anything suitable, buy the matching controller from
Bioennopower.
73, Jim K9YC
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