solar panels good or bad???

Are solar panels worth the cost? Iam seeing many of bldgs with them now.

I got My answer from the experts: Golden Tree Roofing

Thanks for the comments everyone! :)

The smallest roof I installed solar panels on was on a 20sq roof (9 panels). Rough calculations says they would pay off the price of the contract in about 20 years. The house would use more energy than what the panels generate in the winter then flip in the summer. Overall...they would generate a plus every year (but not whole lot)

So even though they are in the plus....it would take about 20 yrs to pay for the panels.

So...The smaller the house (with a 9 panel system) would pay it self off quicker.

Bigger house...needs more panels...more cost....and longer to pay off

Right now....It takes more energy to manufacture a panel than the panel can generate, that is why they are so expensive. Once they have perfected the manufacturing process (less energy to make)..then the price will go down.

WE have all been using solar panels for years. We just call them skylights! A skylight uses the "solar panel" to light a house. If you want to use the sun to heat water or to create electricity, the flashing is the same, but the cost is a lot different. So are the payback times.

It costs about 4 times as much to buy a PV (Photo-voltaic) panel as it does a solar heat collector. How much depends on where you are at, but the costs are in the thousands. The amount of energy generated is relatively small for the amount of money spent. I believe you can spend about $15,000.00 to get a PV system that will generate 1,200 watts. That is about enough to run a small hair dryer. You do the math.

I believe you would be much better off installing skylights for light and paying the electric bills.

Does anyone know what there ball park cost is installed? How many panels does it take to be cost effective on say 200 square roof?

There are many new solar products on the market. It is preferable that they are at a high point (roof top). Why? Sun rises in the east and sets in the west. Trees can cast a shadow on panels. There are sections on the panels that get a slight shade and the whole section won't generate power. If there are placed on the ground...they will be affected greatly.

On flat roofs...you do not have to penetrate...There is a ballast method with slip sheets. Basically a frame with cinder clocks place within the frame to hold it down.

Yes they are! Good and bad!

Most solar installations are found atop the roof. I wonder what provisions are being made to maintain and service the roof. Also, these devices require numerous roof penetrstions for the structual steel supports, and just to rely on pitch pockets presents another problem for the roofer. And ultimate replacement years hence is an important factor that should be considered in the economics equation.