Your iPhone can behave like a solar panel with this app.Keep your phone screen facing the sun and click compute to display how much power could be generated with any size solar panel. It will also email the results to your email if you wish to get the results in your inbox.
You can apply various cloud scenarios to see how the solar output changes. Keep your phone in different orientations and tilt to see how it changes the output.
Finally the result is compared to the US national average. This cool application quickly also computes sun rise, sun set, sun elevation and sun azimuth. It is an informative and educational tool to learn more about solar energy