wrote:
Can anyone speak of the reliability of solar powered attic fans ? I
can buy one for $217.00 in Lowes and live in an area where electricity
is pretty high. A comparable electric Attic Fan is $70.00 . Each
comes with a 5 year warranty . Thanks.

Solar hot water is often a good deal and passive solar heating helps.

Solar-electric anything is a bad investment.

Check here for the skinny on solar fans (but it's a competitive site, so
take with a grain of salt)
http://www.savenrg.com/venting.htm

If one's motivation is to help the environment, it's often better to buy the
"wasteful" alternative and donate the difference to the Plant an Owl
Society.