I am looking to buy a solar panel with:
1. 12 volts
2. 4.5 Watts
3. Up to 250mA- (milli-Amps)?
Do you think this small solar panel will generate enough electricity to charge a 12 volt Sealed lead acid battery?
More Pages:
- Solar Panel: How Many Watts/volts/amps Does A Solar Panel Have To Have To Power A 12 Volt Battery? (10/21/2011)
- Solar Panel: How Would I Go About Charging A 9 Volt Battery With 2 Solar Cell Modules Without Over Charging? (10/6/2011)
- Solar Panel: What Type Of Battery And Solar Cells Should I Use For A Solar Panel System? (5/21/2012)
- Solar Panel: Help With Getting Low Amp Reading With My Solar Panel Array? (11/25/2011)
- Solar Panel: What Kind Of Solar Panel Would I Need To Charge I Car Battery? (6/17/2011)
{ 1 comment… read it below or add one }
If all you want to do is maintain a charge on a large battery without drawing anything from the battery then it would do for that purpose, thats a fully charged battery only connected to the cell to maintain charge.
The panel will not charge a large battery. When you connect the panel to the dead battery the battery will act as a short pulling the voltage down, – lower voltage = lower power.
That and the 4.5 watts being a best case result from the manufacturer, not what you can normally expect.
To charge batteries you need to be able to supply enough current to have a voltage build up on the cell plates, about 2 amps minimum for larger batteries. 85 watt panels are the norm. with the number of panels calculated for the house load, the batteries similarily.
For smaller applications try this link;
http://www.google.co.nz/url?sa=t&source=web&cd=1&ved=0CD4QFjAA&url=http%3A%2F%2Fwww.treehugger.com%2Ffiles%2F2006%2F09%2F20_solar_panel.php&rct=j&q=solar%20panel%20charging&ei=oZkJTpLsI5LSuwPGodWLAw&usg=AFQjCNHsAIyXFxHnPkK90c4I1uR-7d4MwQ&cad=rja