It is often the simplest things which go unnoticed, and in this case it is one of the many applications of solar power. Solar powered attic fans are a great way to make use of the sun’s endless energy.

Generally, fans and ventilators do not require much energy to operate as they are a simple motor connected to light pieces of metal, unlike an air conditioner for example which carries out far more complex and energy intensive processes. Because of this fact, far fewer from the panel and consequently much less surface area on your roof are needed. Obviously, this also reduces the cost of the system.

To determine the size of the solar panels you need for your attic fan to operate during warmer months of the year, there are a number of factors you should take into account. Those are the following: your distance from the equator or latitude which allows you to calculate the average daily solar irradiance for your area, the average number of hours per day you expect to need to have your fan on for, the energy consumption per time, otherwise known as power consumption, of your fan and lastly the efficiency of the solar panels you intend to purchase. Once you have these details, you can run the calculation and determine the area of roof you need to cover with solar panels and their associated cost.

It is also worth remembering that there are many cash incentive programs across the country which can help bring down the capital expenditure required to purchase your solar system. These cash back and other incentives vary from state to state, so it is worth checking with your local dealer or advisor as to what is available for you.

Once you have your solar powered system for your attic fan, you can expect the solar panels to have a useful life time of around 20 years. However, after 15 years their efficiency decreases substantially and after about 25 years they usually need replacing. Having said this, there is very little maintenance required as there are no moving parts. You may simply need to clean the panels once every few months.