Many people are working on making solar energy less expensive. We have already looked at How Nanosolar Works. Here are two other ideas:

1) Popcorn Ball solar panels

Cheap “Popcorn Ball” Solar Cells Set Efficiency Record

From the article:

The University of Washington just made another breakthrough in solar power, that while humorous sounding, certainly offers serious gains. Researchers at the university studying solar cell configurations discovered that by implementing a popcorn ball design — tiny spheres clumped into bigger porous spheres — efficiency in cheap solar cells was near doubled…

2) Tiny solar panels

One of the things that makes solar panels expensive is the cost of the solar cells. If you can reduce their size, you can build more economical solar power generation systems. Here is one way to do it:

Reflective mirrors seen raising solar potential

See also:

[[[See previous invention]]]