The Watt Power output of a Solar module is the number of watts output when it is illuminated under standard conditions. Watt Peak (Wp) is the direct current watts output of a solar module as measured under an Industry standardized Light Test.
Solar modules has dropped from around $27 Watt Peak (Wp) in 1982 to around $2.49 Wp today and can be expected to dive much further in the future. At $1 Wp, grid parity will have been achieved and Photovoltaics (PV) will be able to compete with the prevailing price of electricity.
Solar panels that cost less than $1 per watt to produce are on their way, as Colorado State University’s new method for low-cost, high-efficiency solar panels looks set to begin mass production. They will be sold for about $2 per watt to the public, about half the cost of current solar panels. The cost reduction comes from a new, continuous manufacturing process which uses cadmium telluride thin film rather than the more expensive crystalline silicon.
The lowest thin film module price is at $2.49 per watt (1.89 per watt) from a Germany-based retailer. As a general rule, it is typical to expect thin film modules to be at a price discount to crystalline silicon (for like module powers). As thin film manufacturers expand production, prices are expected to drop dramatically.
Thin Firm CdTe (Cadmium Telluride) semiconductor material also converts low and diffuse light to electricity more efficiently than conventional cells under cloudy weather and dawn and dusk conditions. As a result, Thin Firm CdTe (Cadmium Telluride) modules will generally produce more electricity under real world conditions than conventional solar modules with similar power ratings.
Thin-film solar technologies often use non-silicon semiconductor materials including copper, indium, gallium and selenium (CIGS) to create photovoltaic cells that convert sunlight into electricity. Without the expensive and often sparse silicon, the cells are cheaper in terms of materials costs. The non-silicon materials can also be printed on flexible or light substances, which can create new applications for solar. Many companies are using thin-film technology to produce low-cost solar panels. The cost reduction comes from a new, continuous manufacturing process which uses cadmium telluride thin film rather than the more expensive crystalline silicon. Non-silicon semiconductor materials including copper, indium, gallium and selenium (CIGS) used to create photovoltaic cells.
The measurement of kilowatt-hours per kilowatt installed is an important factor. Calculate the average total solar watt output per dollar outlay. In most cases, when you are reach $0.15/kWh or better, you are competitive with your electric company.
Two 80W panels in series gives you 160 W. You still have the same *current* as you get from one panel, but twice the voltage. There are inverters, battery banks and cabling costs to consider. Most families use between 4 and can run up to 20 Kwh per day for heavy users. A 1000w system would produce about 4 Kwh per day. Build your own solar panel with a do it yourself kit and discover this energy saving technology.
Harness free energy to create solar power for homes and to pay for your power needs. You can discover wind power kits and when you generate more energy than you consume, the power companywill pay you for the power!
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