COMMUNITY FORUM

mark4man

08:17AM | 03/30/06
Member Since: 07/20/05
17 lifetime posts
Bvelectrical
Investigating updating community architectural standards for a homeowners' association; & was wondering...

Just how efficient are roof-based solar panels?

Looking at various manufacturers & power ratings (125W to 200W)...the costs range from $1000 to $2000 per panel.

So...if our residents were to be permitted to install Solar Panels on the roofs of their townhomes, would they have to install a dozen or so panels just to run a hot-water heater?

We're trying to get an idea of how beneficial this would be to the community & the residents. The roof areas here are only about 25' X 25'; & if they needed more than a few panels to generate a worthwhile amount of energy, we would run into an aesthetic problem.

Are there any cost vs. efficiency specs available on the web? We are in NJ.

Thanks,

mark4man


Billhart

10:41AM | 03/30/06
Member Since: 04/25/05
1916 lifetime posts
Efficiency is an engineering term that has to do with the ratio of useful energy out of a system vs the energy available to it.

IIRC current solar cells are about 4-6%. Ie the percent of solar energy that is converted to electrical.

I don't have the numbers but I suspect that direct heating of water with a solar water panels will be much more efficent.

I think that you are looking for effectiveness. That is the suitability of a given system for a given application. Much more subjective.

What is a "worthwile amount of energy" depends on your local energy cost, your local (and federal) incentives (rebates, tax credits, net metering), climate, and your roof orientations.

Within that last few months Fine Home Building has had an article on installing solar electric. And either they or the Journal of Light Construction had one of the difference type of solar water heating systems.

But there are maganizes and website dedicated to alternate energy. A google will find them.

Along with a lot of work by the Department of Energy.


mark4man

01:40PM | 03/31/06
Member Since: 07/20/05
17 lifetime posts
Thanks, Bill.

mark4man
Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Reused steel windows create an eye-catching splashguard in this walk-in shower. The vintage factory windows bring an inter... A galvanized steel tub is a surprising but charming fixture in this bright and breezy screened patio. It's perfect for was... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... If you lack plumbing skills but have a good sturdy tree, here's the easiest outdoor shower solution of all: Simply attach... Need a window and a door in a tight space? A Dutch door with a window may be your answer. These useful doors are split hor... How do you like this smart use for an old bottle? Clamp an empty wine bottle to a fence or wall near your outdoor deck or ... Simple and striking, a couple of pieces of "lovingly used" furniture creates a special kind of charm. A weathered chair fo... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... Repurpose birthday hats to create a string of lanterns for your porch, patio, or garden. Cut the tip of the cone, punch h... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp2