Peter VanDerWal via EV wrote:
Correction, My panels have 2x12 cells. ~5.5V at VMP, ~7V VOC
Now that I think about it, I don't think just using diodes will work. The VMP
and VOC are two far about to make it practical.
How about a zener diode across the panel to limit its peak voltage? Then
a series diode (needed anyway) between it and the Li cell?
The zener would need a high enough power rating to "dump" the output
current of the PV panel in full sun. 5w zeners are easy to get; a 5.1v
5w zener could safely shunt about 500ma (de-rated 2:1 for long life).
You'd have to play with parts to find the right combination.
Lee Hart
--
When something bad happens, you have three choices: You can let it
define you; let it destroy you; or you can let it strengthen you.
-- Theodor Seuss Geisel
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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