Charging Nimh From Solar Panel

If you have a solar cell that doesn t need.

Charging nimh from solar panel.

For a three pack that would be 4 8 v 3 1 6 v and 125 ma 2500 mah 0 05 c 125 ma. Charging 12v 6amp nimh battery with solar panel. Solar charging for load connected nimh battery. Solar trickle charging nimh aa batteries.

I m not worried about maximum number of charging hours because sunlight isn t going to exceed 20 hours in chicago. The battery capacity is 2450 mah with a nominal 1 2 v per cell and the datasheet is here. You now have the complete design for your own solar charger. Charging nimh battery with solar.

The slightly lower voltage is not surprising because the solar charger was designed to end the charge cycle 30mv under max voltage. Here we put the solar power supply together. The solar charger batteries had an average voltage of 1274mv and the duracell charger batteries had an average voltage of 1295mv. 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.

I haven t tested it too extensively and it s. The solar panel is rated at 1 w with a max load voltage of 6 4 v and the product page is here. To charge a battery with a solar panel connect a charge connector to the solar panel. Solar aa nimh battery charger step 1.

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