Are there any "reference designs" for solar charging of Li-ion batteries?
The nominal idea is for a 16-19V panel (designed to charge car batteries/et=
c) through a 5V switchmode supply (automotive USB supply) through one of st=
andard-ish 5V-Li-ion charger chips.  But it could be better, I suppose.
(OTOH, the plan says to provide significantly bigger panel (and bigger batt=
eries) than the application may need, so perhaps cost and reliability is mo=
re of an issue than efficiency.  the solar panels will NOT be in "full sun"=
 most of the time, so part of the design "desirables" would be to be able t=
o collect power better under "less than full output" conditions.  (Say, 10W=
h of batteries charged from a 5W panel, or something like that.)

(solar landscaping lights that work, even though many of the actual lights =
are in full shade, by using a centralized solar panel/battery and wire=85)

Thanks
Bill W


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