Cooling the home efficiently

Hi
I am wondering if anyone could tell me about solar attic fans and how they work exactly. We have just bought a home in texas, and I would like to installs some to take some of the stress of my ac, but have heard that at times its not that simple. any suggestions would be great.

Attic venting is an important aspect in maintaining the functions in your home. Proper venting cools your roof extending the material life and reduces the load on your air conditioning system. Attic venting also increases fresh air circulation which reduces vapor build up generated by everyday activities like showering and cooking. Excess moisture trapped in your attic can cause a variety of problems from rust to rot to increased bacteria and mold counts which can have a direct impact on your respiratory health! Passive vents have been a part of building codes for years but soffit vents, ridge vents and louvers rely on nature to provide sufficient air pressure and air movement. So the majority of the time your attic is stagnant and continues to build up heat and moisture.

The Solar Attic Fan is powered by the sun and the sun only.
Hot attics cause the entire house to be warmer. This gives cooling systems like Air Conditioning more work to do, wasting power and costing you money. Attic fan(s) reduces the temperature of your attic, saving stress on you cooling system, conserving power, and saving you money.