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.

Charging 1 2v nimh batteries with a 2 watt solar panel.

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. 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. The battery capacity is 2450 mah with a nominal 1 2 v per cell and the datasheet is here. The solar panel is rated at 1 w with a max load voltage of 6 4 v and the product page is here.

The batteries are charging in series. Divide the wattage of the solar panel by the voltage of the battery to get the number of amps your charge connector needs to handle. To charge a battery with a solar panel connect a charge connector to the solar panel. I actually tested the panel myself and found that in the best case with 90 000 lux full sun the max voltage was 5 2 v corresponding to a max current of 157 ma.

Because most consumer devices use either internal batteries aa or aaa batteries. Then run wires from the battery to the charge connector making sure to match the positive and negative poles. 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. I have 2 nimh aa batteries 1 2v 2050mah 1 solar panel at 2v 0 3w generating 150mah.

It varies from 3 2 v to 3 7 v ni mh is 1 2 v and nicd is also 1 2 v. My circuit to power a red led require 1 8v so i have to connect the batteries in series in order to light the led.