Charging 1 2v Nimh Batteries With A 2 Watt Solar Panel

I am working on a school project involving charging 4 aaa nimh batteries 1 2v each with a small solar panel used for outside lighting.

Charging 1 2v nimh batteries with a 2 watt solar panel. There are restrcitions on the size of the solar panel that can be used. The solar panel being used is a 12v 40ma solar panel. Because most consumer devices use either internal batteries aa or aaa batteries. The solar panel is rated at 1 w with a max load voltage of 6 4 v and the product page is here.

A 2v solar cell would be more appropriate for charging a single rechargeable battery. Then run wires from the battery to the charge connector making sure to match the positive and negative poles. The battery capacity is 2450 mah with a nominal 1 2 v per cell and the datasheet is here. With the standard 0 7v drop of a diode you ll have 1 3v of charge voltage which won t be high enough for a maximum charge but a schottky rectifier diode selected for 0 5v forward voltage drop would get you 1 5v charging.

I have 2 nimh aa batteries 1 2v 2050mah 1 solar panel at 2v 0 3w generating 150mah. The batteries are charging in series. Let s eliminate the lithium ion because its nominal voltage is over twice the voltage of aa or aaa batteries. That thing i already understand the problem is that i can t charge the 2 batteries with the solar panel while the batteries are in series as.

It varies from 3 2 v to 3 7 v ni mh is 1 2 v and nicd is also 1 2 v. To charge a battery with a solar panel connect a charge connector to the solar panel.