12 volt lithium battery Why Not Solar?

In 1978, John Schaeffer, founder and CEO of Real Goods, sold and installed the first residential photovoltaic power generation system in the United States.It was an off-the-A power grid 12 v dc (DC) system operating at a conversion efficiency of 8%, due to the cost of the system, generates electricity at a price of about $500 per watt.Same order today-Photovoltaic (PV) system with an average of 16-The efficiency of 20% has dropped to nearly 100 of the price.
A 2-The kW system meets almost all the needs of a very energy-efficient home with an installation cost of about $20,000, or $10 per watt.At the high end, the installation cost of a 5 KW system that fully meets the energy needs of most traditional households is $30,000 to $40,000, or $6 to $8 per watt.These prices are rough estimates, and the actual cost depends on the system configuration, device type, and other variables.
Still, for the average consumer, solar energy is still important in terms of label prices.Fortunately, states like California, Nevada, Wyoming and Connecticut are joining the bill to provide everything from tax incentives to rebates for homeowners who decide to use solar energy.In Colorado, for example, there are $4."Renewable energy" 50 rebates per wattHomeowners provide alternative energy from any renewable energy source such as solar or wind power.
Incentives like this can reduce costs to $1.50 watts per watt or even less.The California Energy Commission estimates that 6,500 KW of a housea 3-kilowatt solar-The power system will get up to 93% of the energy from solar energy."My point is that the technology will continue to grow in an incremental way, and if you analyze its economy now, it makes sense for solar energy to have states with kickbacks, Scheffer said.
"It has a return of 6 to 12 years, which means a return on investment of 10 to 15%, which is better than the return you get on the stock market or CD.In states that don't have rebates, the return is close to 10 to 20 years, says Schaeffer.But there are other advantages to installing solar energy.
Unlike the average solar energy 30 years agoPower-powered homes are completely out of the grid, and today nearly 95% of the people who install solar systems do so, while still in touch with utilities.Use not only the grid for backup, but also on-The on-site battery bank has reduced the installation cost of solar energy by about 25%, and people who invest in residential renewable energy can sell the extra power they generate to their utility companies, usually at the retail price charged by the company.Even if they don't sell energy, installing a renewable energy system will usually permanently lock in electricity bills per kilowatt hour-a good deal when you consider electricity bills ranging from 6 to 8% a year.
Rethinking the costs of some camps, thinking from the perspective of "returns" or return on investment, is a questionable way to assess the purchase of alternative energy technologies for families.Northwest eco said: "the full content of the return is actually a wrong logic.Member of the board of directors of the Building Association, green building contractor Fiona DouglasHamilton.
"When they build a new terrace or spend $50,000 to build a pool, few people will consider paying off.They just want to fulfill a wish.Why should luxury goods be exempted when sustainable technology is forced to reach some arbitrary concept of return?It just shows the distortion of our value structure in terms of spending money.In the alternative energy market, values are not the only thing that is distorted.
As a society, we have invested heavily in the existing oil economically and emotionally.Energy systems like propane and heating oil.We rarely have access to information about the real price structure and cost involved in these systems.
Kim Kristoff, chairman of the bio-based Manufacturers Association, chairman and CEO of the bio-based Manufacturers AssociationCompanies based in Gemtek Inc.Pointing out that we tend to look at oil from the perspective of market prices.But this price does not reflect the high government subsidies and other costs we bear as taxpayers.
"We don't talk about subsidies, deaths, and billions of dollars invested in defending oil," Kristoff said ." Kristoff is a member of several advisory committees in Congress."I still meet people who think it's only $2 $20 for petrol30-40 -$.
80 a gallon.
All you have to do is divide all the billions spent by the sales volume of the gallon and you can quickly find out that it has to be over $1520 per gallon.But you don't have to adjust the price of oil in order to make PV an attractive deal.In some applications, PV is already a cost-effective option for direct energy costs compared to standard market price gasoline.
Mike Nelson, director of the Northwest Solar Center for the Washington State University energy project in Seattle, Washington, said that currently the solar panels on the roof of a house in eastern Washington will provide enough power to drive the plugHybrid Prius travels 15,000 miles a year, and the cost of photovoltaic power generation is lower than the cost of a considerable amount of gasoline.Should I wait for the nano?At present, about 1% of households in the country use solar energy, and the industry is experiencing an explosive growth of 30% per year.The manufacturing costs of single-crystal silicon wafers and polysilicon wafers, which are the basis of most photovoltaic panels, continue to decline.
But like every emerging industry, solar energy has experienced growing pains.Wafer Manufacturing costs should have dropped by 50% over the past three years, but these costs have not declined due to a long-term shortage of polysilicon.The new silicon refinery is stepping up construction across the country, the largest of which will be a Norwegian-owned refinery located in West Lake, Washington.
But it takes time to build refineries, and critics point out that many are still using old technologies that produce silicon more energy than they should.At the same time, great advances in nanotechnology are beginning to shake the solar industry.The next generation of photovoltaic systems is likelySilicon Solar film, configured at the molecular level, converts sunlight into electricity.
The shatter-The waterproof solar film, which will be produced and rolled out in large quantities, can be cut into large plates that meet the specific roof configuration and is easy to install.The technology is led by Nano solar.The company is currently building the world's largest solar film manufacturing plant in Palo Alto, California, and is expected to reduce the cost of solar panels by 90% in 10 years and increase solar efficiency to about 50%.By 2015, nanotechnology is expected to help the solar industry grow to $51 billion.
But many solar experts like Schaeffler and Wilson are wary of the new technology.They still believe that the continuous improvement of silicon wafer photovoltaic technology will guide the market for a long time."Over the past 30 years, you 've heard a new technology come out every year, and the efficiency will be 30, 40 or 50%, and the price will be reduced by 70%, Scheffer said.
"Every time this happens, we get calls from a lot of people asking if they should postpone the purchase of a photovoltaic system until it comes out.This has happened from ribbon string technology, arsenic-based aluminum, nanotechnology, and a variety of things.But the story is still like this, and solar is still working.
And the effect is very good.
The hippie image of the sun moving from "back to Earth" in the 60 s and 1970s s has long disappeared.Inverter technology that converts solar DC to AC current has evolved to the stage where solar energy is generated as clean as the energy purchased from the "Trunk Line" (mainstream utility.Bulky solar panels still exist, but, to meet aesthetic needs, manufacturers have also scaled down and re-shaped them so that they can look like metal roofs, wooden tiles and even cement tiles.
No matter how your lifestyle is, solar can support it.But there are ways in the process to achieve all this and save a lot of energy.Families in the United States use an average of 18 to 30 KW hours a day (kWh ).
Whether online or off the grid, Nelson suggests that those who want to save money become "energy Nazis ".First of all, the most important thing is to convert incandescent lamps into compact fluorescent lamps.If you are building, set your home South if possible in order to take advantage of daytime lighting and use the lights only at night.
Place the CRT display on the computer and get the LCD flat screen.Even better, throw away the floor model computer that consumes 250 Watts a day and buy a laptop that uses only 20 watts.If you have to buy a widescreen TV, buy an LCD TV-the plasma screen is an energetic product.
The biggest power load in our house is refrigeration, so buy a good energy star refrigerator, or better, buy a euro vestover refrigerator that costs $1100 and uses several kilowatt hours a day."The reality is that most of us just need to use about 10% of the electricity gracefully to get through it," Nelson said ."."My house is online, but we use an average of 3 KW hours and a half a day.
Families in Washington state use about 30 KW hours a day on average.Therefore, the electricity we use is about the eighth of the electricity that ordinary people use through conscious protection.He also said it seemed counter-intuitive but kept the coffee maker and hairdryer.
They are only used for a short period of time each day, so their "work cycle" is small.According to Nelson, hair dryers are more energy efficient than ordinary incandescent lamps."Think about it.An incandescent lamp can be pulled 100 watts and works eight hours a day.
800 watt hours a day, almost kilowatts of energy.The hair dryer can pull 1500 watts, but only open for 5 to 10 minutes.Do the math.The core issue of protection is that it is actually a behavior that operates more intelligently than anything else.
http://www.
nrel.
Gov/docs/fy04 osti/35297.
PVWATTS calculate electricity generated by the gridConnected photovoltaic (PV) systems in the United States and its territory.http://rredc.nrel.The government/solar/calculator/PVWATTS/Renewable Resources Data Center (RReDC) is supported by the National Photovoltaic Center (NCPV) and managed by the Energy Efficiency and Renewable Energy Office of the Department of Energy.RReDC is maintained by the power system Center of the National Renewable Energy Laboratory.
http://rredc.
nrel.
http://www.
dsireusa.