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
1918 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

Oversize windows let the outside in, even in a cozy cottage bathroom like this one. A roller screen and wraparound shower ... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... Few projects are more fun than upcycling a vintage piece in a surprising way. Outfitted with a sink and a delicately tiled... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... 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... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... 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