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

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The batteries are charging in series.

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 is rated at 1 w with a max load voltage of 6 4 v and the product page is here. The solar panel being used is a 12v 40ma solar panel. A 2v solar cell would be more appropriate for charging a single rechargeable battery.

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. The battery capacity is 2450 mah with a nominal 1 2 v per cell and the datasheet is here. Because most consumer devices use either internal batteries aa or aaa batteries. 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. 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. 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. 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.

Then run wires from the battery to the charge connector making sure to match the positive and negative poles. 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.

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