Can you imagine getting electrical power from balloons? This is what Cool Earth of Livermore, California, has designed the next generation of solar collectors to look like. The basic concept hasn’t changed; convert sunlight into electric power using solar cells; but the packaging has changed, and this is where the solar balloons are unique.

One of the areas of concern with the current flat-panel solar design is cost. Flat-panel designs require metal cases, rigid mounting hardware, heavy glass and large amounts of cell material. The cost per watt for solar panels is generally 5 to 7 times greater than conventional power plants. This is no longer true with the solar balloon system.

One side of the balloon is made from reflective silver Mylar plastic. The other half is transparent to allow in sunlight. The silver material is parabolic-shaped to concentrate the sunlight on to a single point to achieve maximum light concentration. This is why high performance solar cells are used.

With the new design comes and the ability to increase sunlight concentration and reduce expensive solar cell material by 300 to 400 times. This cost reduction will bring the price down to a mere one dollar per watt. To give that some context: a typical flat-panel PV(photovoltaic) system on a residential rooftop is about seven to eight dollars per watt.

The basic structure of each orb is simple. It has a lightweight circular metal frame with an arm that holds the solar cells near the top of the clear side of the orb. Even though the balloon is eight feet in diameter, the frame is the only rigid component of the basic design. It connects to a point where external hardware is attached for mounting.

One of the areas under consideration is the need to add more peaking power plants, also known as peaker plants. A peaker plant is operational only when demand for electricity is at the greatest, like during the hot summer months. This green product could be used to eliminate rolling brown outages that we have encountered in the past few years.

At Green Products, one of the most interesting aspects we see is the way the system is brought together to create a solar power plant and the near elimination of physical limitations on plant installations. Check it out.

Michael