Morning, I bought a cheap solar panel (6V, 250mA) from radio shack to expieriment with as well as a lm317 and 25 ohm pot for limiting current. I quickly discovered (duh) that the max output for this panel never exceeds c/10 (250mA for 2500mA batteries) so the LM317 wasn't needed. My question is this, each cell is 1.2V, would putting 4 in series drop the current too much for the panel to be useful for one day charging because of the internal resistance?, and, if I put 2 in series, is the supply voltage harming the cells? should I pop in a couple of diodes to drop the voltage?
Thanks, Mike
Thanks, Mike