Solar-powered roof ,

Matt C. 50°

I designed a simple 15 watt/12 volt solar panel powered attic fan system. Is there a simple way I can add a new or used 12 volt sealed lead acid battery (18 ah) to the circuit so the fan will run at least some time after sun rise. The fan is rated as 12 volt/1.2 amp. I imagine I need another panel to do so because it seems that the system as is has no reserve energy to charge the battery (i.e. P=I*E (15 watts = 12v*E...E=1.25amps)... in other words, there is only .05 amps left over to charge the battery...

Featured Companies & Orgs 

Pledge to do these related actions

Chop your heating bill this winter!, 71°

This winter instead of cranking up the thermostat, try out a space heater. They're cheap, ...

Plan your trips in advance to avoid unnecessary driving, 448°

Takes a little bit of effort to plan your trips in advance, but ultimately helps ...

We Need Clean Energy, Not Clean Coal!, 109°

During the Vice Presidential debate, both Senator Biden and Governor Palin touting their support for ...

Follow these related projects

Carpool King

New Zealand