Solar electric power costs lowered to 2.99 cents a kWh to produce with no subsidies.
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aFicIoNadoS
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Posted 12:30 pm, 06/01/2016
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Which library can I drop you off at, Stupid?
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springtime123
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Posted 12:12 pm, 06/01/2016
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aFicIoNadoS | Posted 11:47 am, 06/01/2016 | Thanks springy, if I need to power up a tent, I'll keep that link in mind. But for a home, it's useless. You've been debunked on this subject before. Why do you keep trying? |
You can lead an idiot to a library but you can't make them think. Just go on playing with your dolls and leave the thinking to us.
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aFicIoNadoS
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Posted 11:47 am, 06/01/2016
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Thanks springy, if I need to power up a tent, I'll keep that link in mind. But for a home, it's useless. You've been debunked on this subject before. Why do you keep trying?
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aFicIoNadoS
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Posted 8:09 am, 06/01/2016
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I haven't looked up actual costs on the parts in a while, but just a ballpark guess, I'd say probably in the $55k neighborhood. Although, being you said 3 days, and last time I did some research I may have calculated on just a 24 hour period. Second guess, add another $25k for batteries.
Now the catch, around here we regularly go through periods longer than 3 days of cloud cover or bad weather. So you'd still need to be plugged into the grid
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Crypt
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Posted 12:11 am, 06/01/2016
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I haven't calculated the cost of antithesis typical off grid home yet, but let's just say it's gonna be yooooge. 
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Crypt
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Posted 11:57 pm, 05/31/2016
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And I'll help you out by recommending a 48v system, I believe it was around 67 panels, at least a 15 kw invertor, and about 15,000 amp hours worth of batteries should allow you to hobble along for a few days of no sun. Don't forget the 13 kw charge controller. You won't be able to heat the pool and run the electric furnace at the same time with this economy system but you could have all the lights on while you took a hot shower.
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Crypt
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Posted 11:17 pm, 05/31/2016
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Now antithesis you already have an A in this class. To get the A+ all you have to do is total the cost of your 1,000 sq. ft system and lets forget the labor and only use the cost of the main materials. Pick your invertor, storage batteries, solar panels and charge controller and let's see the total cost.
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Crypt
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Posted 11:08 pm, 05/31/2016
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So you use over 30,000 kwh per year not the ave. 11,000.
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Crypt
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Posted 10:51 pm, 05/31/2016
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antithesis to generate the 16.7 mwh per year would require the 16.4 watt per sq. ft. panel receive full direct sun for a full 6 hrs on average for 170 days this yeat. So how much is your power bill per month antithesis?
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antithesis
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Posted 10:43 pm, 05/31/2016
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If we have 129 billion square feet of roof space in the US, then that's 8.6 billion panels possible. With 190W panels, that 1.634 billion kW.
Assume that the average band is 1500, that's 2,451 billion kWh per year.
So if this is accurate then I would agree that we would need 11 times the available roof space to generate enough electricity for the entire US.
Popular Science did an article on this a few months ago, though, and said that 39% of the US's energy consumption could be generated by solar:
http://www.popsci.com/new-s...ted-states
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Crypt
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Posted 10:24 pm, 05/31/2016
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And to be clear generating means the end result such as sending 35 kwh back into the electric car.
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antithesis
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Posted 10:18 pm, 05/31/2016
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| Go back and read the link again that is the amount you can generate in a year.
Find your city in the map and match it to the numbered area.
Let's start with our home, Portland, Oregon. Our city lies within the 1400 band, so 1400 is our number. Multiply the number of kW your system is rated for (we get 4.75 from above) by the number of the map color in your area. For us it's: 4.75 x 1400 = 6650. Next, multiply that number by 0.78. Why 0.78? It represents the percentage of electricity you can expect to capture, based on inverter efficiency, panel performance, and losses from wiring. We calculate: 6650 x 0.78 = 5,178 kWh generated per year.
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That's for a 375 square foot roof in Portland. The link I gave before says that a typical house has 1,000 square feet of roof: http://zebu.uoregon.edu/dis...62/l4.htmlSo we're 12.6 kW, where the author was 4.75. And North Carolina is in the 1700 band. 12.6 x 1700 = 21,420 Multiply by 0.78 for efficiency: 21420 x 0.78 = 16707.6 So, 16,707 kWh generated per year. And the typical house needs 11,700kWh. So we're still generating 43% more than is necessary.
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Crypt
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Posted 10:17 pm, 05/31/2016
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Springtime123 a 200 watt panel will only generate 200 watts when the sun is directly over it which is only for a few minutes of the day, or maybe you have your house on a turntable. In the real world with all things considered, you would be lucky to average generating the equivalent of 1 gallon of gas per day even with 1,000 sq. ft. of panels.
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Crypt
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Posted 10:09 pm, 05/31/2016
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Joseph T. is correct on the hours and I based all my statements on 6 hrs of sun and like I said my calculations are very close.
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springtime123
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Posted 10:09 pm, 05/31/2016
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Crypt | Posted 9:47 pm, 05/31/2016 | Notice the best panel is 16.4 watts per sq.ft. So 1000 sq.ft = 16.4 kw x 8 hrs. = 131.2 kwh. |
I don't know where you are getting your information but this is not correct. BACKWOODS SOLAR has a panel that generates 33.3 watts per sq foot. 33 X 8 hrs= 264 watts per foot. or 2.1 K watts wh per day per sq foot. That is 211 K watts wh per day with 1000 sq foot of cells.
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Elmo Cleghorn
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Posted 10:07 pm, 05/31/2016
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I wish an efficient solar system was in my budget. I would love to be totally off grid for power.
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aFicIoNadoS
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Posted 10:07 pm, 05/31/2016
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And if the average home uses 30KWh a day, that comes to a total of 10,950KWh a year.
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aFicIoNadoS
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Posted 10:05 pm, 05/31/2016
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Sorry, my last reply was directed to antithesis.
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