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mclark999

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Posts: 183
Reply with quote  #11 
I built a fairly small double-screen based collector, just 44 square feet and with reflectors on a sunny day it provides 90 percent of my home's heating needs.  See it here: http://www.simplysolar.supporttopics.com/post/denver-double-screen-active-collector-7211991?pid=1286386169#post1286386169.

It cost me about $400 but will pay for itself in under one season of running.  It took me about 12 hours to build and I would say it's been absolutely worth it. My only concern at this point is overheating if the fan dies or electricy goes out while it's sunny out and I'm not at home. 

I'm going to add a small solar powered fan to it this fall as a backup so that it can't overheat.

I highly recommend it for anyone that can saw wood and screw things together. 

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Denver, CO

Double screen hot air collector

BrightastheSun

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Posts: 1
Reply with quote  #12 
It is amazing to see how far solar has come since this thread began. I see the comments about how solar was dying and it is quite relieving to see how alive and well it is. Our climate is undeniably changing meanwhile energy companies keep raising prices, both a the result from corporate greed. I appreciate this information and hope all homeowners will consider solar as our climate needs to see some vast changes quickly.
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BrightAsTheSun

 "What do oil company executives, vampires and NASA bureaucrats all have in common? They fear solar energy." -Dr. Michio Kaku

http://californiasolarsavers.com/

terrybarnes

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Posts: 3
Reply with quote  #13 

As we know that the solar system is the green solution & beneficial alternative for electricity. For residential purpose solar panels help you to reduce power bills. Though we see that everything has come with advantages & disadvantages both. But the thing that matters is solar panels coming with lots of advantages, like Renewable energy source, save electricity bills, Low maintenance cost, green solution and many more.. [smile]

Insolergy

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Posts: 6
Reply with quote  #14 
Even though solar is costly, it can be a costly investment, but in long run solar power can pay off. Power prices are increasing and installing solar will help you to save your money on electricity bills. Solar should be considered as a long term investment. In order to make is affordable for everyone government is coming up with solar subsidy as well.
stmbtwle

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Posts: 2,699
Reply with quote  #15 
Check your bill before doing anything. In my area the kwh rate has actually gone DOWN possibly due to natural gas. However the "service charge" continues to go UP (the utilities are catching on). The only way to avoid that is to go off grid.

A site like PVWATTS can help you estimate how much you will get from a given installation. You can also plug in your local utility rate.

And then there's politics.

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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
alberto

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Posts: 12
Reply with quote  #16 
It depends. You have to take each case separately and calculate the ROI (return on investment). This way you can know whether it is worthwhile or not.
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"We do not inherit the Earth from our Ancestors, we borrow it from our Children"
Solar panels, wind turbines, solar vehicle...may help
gbwillson

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Reply with quote  #17 
In many cases it is not cost effective or practical, although it might make you feel good at the time of purchase. Many parts of the world have too little sun to be effective much of the year. The average person moves every 7 years. You will need to be in a home for many years, as the ROI for a PV system for the home can take 20+ years. Even the most expensive PV panels are little over 20% efficient, and still lose efficiency as they age. And often not talked about is the disposal of the worn out panels as they contain some very toxic materials.

We are a LONG way from renewable energy supplying all of our energy needs. Until then, conventional power plants will still be needed. That being said, new exciting materials and designs are invented every day. We already have roofing materials, roads, windows, and even paints being used to collect solar energy. But most are still inefficient or too new, but the possibilities are endless...and exciting!

Greg in MN
stmbtwle

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Reply with quote  #18 
That plus the fact most homes aren't built or situated with solar energy in mind. While energy independence is nice, it's expensive. I think the utilities will be the leaders in solar. They have the advantage of scale and wholesale pricing, we don't.
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Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
robertpelletier

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Posts: 16
Reply with quote  #19 
Yes, solar energy is the one which is very purest energy and if usage of solar panels increases it will automatically reduce the green house gas emission as well as dependence on fossil fuels.


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Best solar flood lights - Top reviews of 2018
Best solar flood lights - Top reviews of 2018  
Rick H Parker

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Posts: 727
Reply with quote  #20 
Bill Gates hit it on the head. People are going to need to tackle this problem. Incorporated persons are too greedy and sociopathic to do so.

http://axisoflogic.com/artman/publish/Article_75070.shtml

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Rick H Parker
Kansas, USA
Electronics Engineering Technologist
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