Solar Empire - Endless War » solar panels http://www.solar-empire.net Sat, 04 Feb 2012 02:10:46 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 How can i build a solar panels on the roof of my house? http://www.solar-empire.net/solar-panels/how-can-i-build-a-solar-panels-on-the-roof-of-my-house http://www.solar-empire.net/solar-panels/how-can-i-build-a-solar-panels-on-the-roof-of-my-house#comments Fri, 02 Dec 2011 06:12:23 +0000 admin http://www.solar-empire.net/solar-panels/how-can-i-build-a-solar-panels-on-the-roof-of-my-house How can i build a solar panels on the roof of my house?

]]> http://www.solar-empire.net/solar-panels/how-can-i-build-a-solar-panels-on-the-roof-of-my-house/feed 0 With solar panels, what is the difference between price per watt and the total cost of the panel? http://www.solar-empire.net/solar-panels/with-solar-panels-what-is-the-difference-between-price-per-watt-and-the-total-cost-of-the-panel http://www.solar-empire.net/solar-panels/with-solar-panels-what-is-the-difference-between-price-per-watt-and-the-total-cost-of-the-panel#comments Sun, 13 Nov 2011 02:35:05 +0000 admin http://www.solar-empire.net/solar-panels/with-solar-panels-what-is-the-difference-between-price-per-watt-and-the-total-cost-of-the-panel When you are purchasing large quantities of photovoltaic solar panels, they are priced as the overall cost, and then a price per watt. What is the difference, and how does the price per watt relate to the overall performance?

The price per watt is a figure of merit, but is not how the panels are sold, any more than a gallon of gas is sold by how many miles you will be able to drive with it. You buy the gas at a certain price, then how many miles you actually get depends on what car you drive, and other factors.

In the same way, a certain model of panel is sold for an agreed-upon price. Let’s say it’s a 200-watt panel, and sold for $400. If the panel was rated in accordance with established standards, that means the panel will deliver 200 watts under ideal sunlight and temperature (that only happens about an hour a day, if that). So you can calculate that the price was 400/200 = $2 per watt.

If the strong sunlight shines on the panel for 1 hour, then the energy produced is 200 watt-hours. This is where many people get confused. A watt is different from a watt-hour. A watt is a unit of power, like how strong a man is. A watt-hour is a unit of energy, like the work accomplished by that man in 1 hour.

The watt-hours or kilowatt-hours delivered are what light the rooms, run the appliances, or are sold to the power company. Getting those is a matter of having a good geographic location and installation.

]]> http://www.solar-empire.net/solar-panels/with-solar-panels-what-is-the-difference-between-price-per-watt-and-the-total-cost-of-the-panel/feed 3 How many solar panels with one wind generator would you need to power a pop up? http://www.solar-empire.net/solar-panels/how-many-solar-panels-with-one-wind-generator-would-you-need-to-power-a-pop-up http://www.solar-empire.net/solar-panels/how-many-solar-panels-with-one-wind-generator-would-you-need-to-power-a-pop-up#comments Sun, 06 Nov 2011 04:00:11 +0000 admin http://www.solar-empire.net/solar-panels/how-many-solar-panels-with-one-wind-generator-would-you-need-to-power-a-pop-up I am looking at buying a pop up and would like to make it run off of deep cycle batteries but charging these batteries I would like to use a combination of solar panels and 1 wind generator. How many batteries would I need how many solar panels and what wind generator should I buy. I would be powering the lights an fridge and sometimes a AC or Heater.

Thanks
I live in west Texas where it never rains and its always windy

Hope it’s not cloudy without wind for a while, you’ll be left with warm food and darkness.

An air conditioner/heater would be such a huge load on the system, wind/solar most likely don’t make sense for an individual, unless you’re on a lake or in California where it’s sunny everyday.

You would need around 200 W for a fridge, 100 W for small lights, and….500 W (?) for heating/air….so you’re looking at some pretty big batteries!! Every 2 hours you will use at least 1.5 kWh of energy.

]]> http://www.solar-empire.net/solar-panels/how-many-solar-panels-with-one-wind-generator-would-you-need-to-power-a-pop-up/feed 4 Are solar panels more effective than using the heat energy of the sun to power a turbine? http://www.solar-empire.net/solar-panels/are-solar-panels-more-effective-than-using-the-heat-energy-of-the-sun-to-power-a-turbine http://www.solar-empire.net/solar-panels/are-solar-panels-more-effective-than-using-the-heat-energy-of-the-sun-to-power-a-turbine#comments Fri, 12 Aug 2011 22:48:36 +0000 admin http://www.solar-empire.net/solar-panels/are-solar-panels-more-effective-than-using-the-heat-energy-of-the-sun-to-power-a-turbine Practically all you ever hear about is solar panels… are they really so much more effective then other methods, such as using energy from the sun to power a steam-powered turbine enclosed in a system with a vacuum so that the water evaporates at a much lower temperature to power a turbine?

It’s a good idea to explore, especially if you combine it with a desalinization plant for added efficiency.

]]> http://www.solar-empire.net/solar-panels/are-solar-panels-more-effective-than-using-the-heat-energy-of-the-sun-to-power-a-turbine/feed 7 How many kilowatt hours of electricity will the solar panels generate in 20 days? http://www.solar-empire.net/solar-panels/how-many-kilowatt-hours-of-electricity-will-the-solar-panels-generate-in-20-days http://www.solar-empire.net/solar-panels/how-many-kilowatt-hours-of-electricity-will-the-solar-panels-generate-in-20-days#comments Tue, 24 May 2011 16:00:07 +0000 admin http://www.solar-empire.net/solar-panels/how-many-kilowatt-hours-of-electricity-will-the-solar-panels-generate-in-20-days A house with a south-facing roof has photovoltaic panels on the roof. The photovoltaic panels have an efficiency of 10.3 % and occupy an area with dimensions 3.35 m by 8.55 m. The average solar radiation incident on the panels is 305 W/m2, averaged over all conditions for a year. How many kilowatt hours of electricity will the solar panels generate in 20 days?

area is 28.64 m²
incident power is 305 W/m² x 28.64 m² = 8740 watts
output power = 8740 watts x 0.103 = 900 watts

900 watts x 24 hr/day x 20 days = 432000 watt-hour / day or 432 kW-hour / day

.

]]> http://www.solar-empire.net/solar-panels/how-many-kilowatt-hours-of-electricity-will-the-solar-panels-generate-in-20-days/feed 2 What is the probability that none of the houses have solar panels to generate electricty? http://www.solar-empire.net/solar-panels/what-is-the-probability-that-none-of-the-houses-have-solar-panels-to-generate-electricty http://www.solar-empire.net/solar-panels/what-is-the-probability-that-none-of-the-houses-have-solar-panels-to-generate-electricty#comments Fri, 06 May 2011 15:00:12 +0000 admin http://www.solar-empire.net/solar-panels/what-is-the-probability-that-none-of-the-houses-have-solar-panels-to-generate-electricty Using a survey conducted in Winter 2009, it was estimated that only 1% of New Zealanders have solar panels on their houses to generate electricity. Consider a random sample of 20 New Zealand households.

a) What is the probability that at least one of them has solar panels to generate electricity?
b) What is the probability that none of them have solar panels to generate electricity?

Binomial Sampling Distribution:

P(n) = C(N,n) * p^n * (1-p)^(N-n)

where N = 20 and n = 0:

P(0) = C(20,0) * (1/100)^0 * (99/100)^(20-0) =

1 * 1 * 99^20 / 100^20 =

note: divided numerator and denominator by a common multiple of 10/
8179069375972306130 / 10000000000000000 =

P(0)= 0.8179

a) At least one has solar panels: P(n>0) = 1.0 – P(0) = 1.0 – 0.8179 = 0.1821

b) None of the 20 have solar panels: P(n=0) = P(0) = 0.8179

]]> http://www.solar-empire.net/solar-panels/what-is-the-probability-that-none-of-the-houses-have-solar-panels-to-generate-electricty/feed 2 How many solar panels do you need to run a house? http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-you-need-to-run-a-house http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-you-need-to-run-a-house#comments Tue, 03 May 2011 23:15:12 +0000 admin http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-you-need-to-run-a-house How many solar panels do you need to run an air conditioned house? To be exact, an 3,4000 square foot house? And how much would the total cost be?

My guess is that your real interest is in saving money? If you are thinking long term, solar electricity can save money if you live in a suitable area. It does not have to run the entire house. A modern system will work side-by-side with the normal power you use today, so whether the solar displaces 10% of your electricity or 100%, you can still save money.

The only way to get an accurate estimate of the financials is to ask a solar installer for a quote. Prices of systems vary widely depending on how much power you want, and the local price of labor.

]]> http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-you-need-to-run-a-house/feed 5 Can you solder solar panels together to get more power? http://www.solar-empire.net/solar-panels/can-you-solder-solar-panels-together-to-get-more-power http://www.solar-empire.net/solar-panels/can-you-solder-solar-panels-together-to-get-more-power#comments Tue, 26 Apr 2011 10:46:06 +0000 admin http://www.solar-empire.net/solar-panels/can-you-solder-solar-panels-together-to-get-more-power I have getting solar panels from these solar lights at Walmart. Well some of them are broken, but the solar panels are still in good shape. So I wanting to put the together to maked a large solar panel big en ought to power a laptop
If you can how do you solder them together? Do you link them together just like a double A’s?

Agree with gintable. You need to do this according to guidelines and any local building codes for the safety of yourself while installing and safety afterwards. This is electricity.

These are quite cost-effective, and there are also incentives from Federal govt and many state governments to upgrade panels. Article discussing incentive, including links for state incentives/rebates is below.

]]> http://www.solar-empire.net/solar-panels/can-you-solder-solar-panels-together-to-get-more-power/feed 7 How many solar panels do I need to run a pump? http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-i-need-to-run-a-pump http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-i-need-to-run-a-pump#comments Thu, 18 Nov 2010 07:25:51 +0000 admin http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-i-need-to-run-a-pump I plan to buy solar panels of the following configuration:
Sun Force 39110 / 123 watt – 7 amps

To run through an inverter, to produce the 110v I need to run the pump during the day.
The pump is 110v / 7.5 amps / 0.5 HP

My question is, how many solar panels would I need to run the pump?

Are you sure you want those panels? It would probably be more cost-effective to get higher-wattage panels. From those specs, it sounds like you need about 800 watts of panels. That’s 4 200-watt panels.

I would skip the inverter, and look for a pump that runs off DC. In fact, many AC motors will run off DC, although that’s a trial-and-error sort of thing that no one will guarantee. Typically you would lower the voltage input to do so, so a 110-volt AC induction motor would run off maybe 70-80 volts DC, to avoid burning out the motor. But if you get a pump rated for DC, then you’ll certainly have something that works right.

]]> http://www.solar-empire.net/solar-panels/how-many-solar-panels-do-i-need-to-run-a-pump/feed 2 Where can I buy a portable solar panels for my home in the Philippines? http://www.solar-empire.net/solar-panels/where-can-i-buy-a-portable-solar-panels-for-my-home-in-the-philippines http://www.solar-empire.net/solar-panels/where-can-i-buy-a-portable-solar-panels-for-my-home-in-the-philippines#comments Sun, 27 Jun 2010 02:45:05 +0000 admin http://www.solar-empire.net/solar-panels/where-can-i-buy-a-portable-solar-panels-for-my-home-in-the-philippines With the power crisis looming in, I think it’s better to have a solar panel than buy a portable generator which eats up petrol. Philippines must have the costliest fuel per liter in Asia. Problem is, solar panels can’t be bought as easily as generators.

the endless world of the internet

]]> http://www.solar-empire.net/solar-panels/where-can-i-buy-a-portable-solar-panels-for-my-home-in-the-philippines/feed 1