30
September
2009
September
2009
Solar Panels?
How many solar panels would i need to charge 4 AA batteries, each produce 1.2 volts. The solar panel delivers about 0.3-amps at 0.55VDC in full sunlight. How long would it take to charge them with the fewest amount of solar panels?
The batteries get 90ma or 900mah
are you sure about those numbers?
0.55VDC is too low to charge any battery. The voltage has to be at least 2 volts.
The 0.3 amps is enough, more than enough to charge AA cells.
If those are correct numbers, you could put 3 in series and get 1.6 volts, barely enough. If you really get 300ma out of the panels, then it should charge the a battery in 3 hours. 12 hours for all 4. But monitor voltage and current carefully.
are you sure about those numbers?
0.55VDC is too low to charge any battery. The voltage has to be at least 2 volts.
The 0.3 amps is enough, more than enough to charge AA cells.
If those are correct numbers, you could put 3 in series and get 1.6 volts, barely enough. If you really get 300ma out of the panels, then it should charge the a battery in 3 hours. 12 hours for all 4. But monitor voltage and current carefully.
References :