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 prices are falling fast, especially with thin-film technology. From early $27 per Watt Peak (Wp) prices to an expected $1 in the near future. At $1 Wp, grid parity will have been achieved in Photovoltaics (PV) and will be able to compete with the prevailing price of electricity.
Two types of solar panels are manufactured, expensive crystalline silicon types and proprietary thin-film solar panels. Thin Firm CdTe (Cadmium Telluride) is a direct band gap semiconductor, which enables it to convert solar energy into electricity more efficiently (i.e., more watts per kg of material) than the indirect band gap semiconductor materials used historically.
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.
Solar cells become less efficient at converting solar energy into electricity as their cell temperatures increase. However, the efficiency of Thin Firm CdTe (Cadmium Telluride) semiconductor material is less susceptible to cell temperature increases than traditional semiconductors.
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.
A crucial metric that most look at is the measurement of kilowatt-hours per kilowatt installed. Find the wattage produced by your solar panel into watts per dollar. Most likely, when you are reach $0.15/kWh or better, you are competitive with your electric company.
There are cabling costs battery banks and inverters to consider. Calculating solar output, use an average of 5 hrs per day of sun. Eg. 4 x 80w panels produce 320 watts x 5 hrs should produce 1600 watts or 1.6 Kw per day. A 1000w system would produce about 4 Kwh per day. Most families use between 3-10 Kwh per day. Harness your very own experience with a do it yourself solar panel kit and discover this energy saving technology.
Harness free energy to create solar power for homes and to generate your energy needs. You can discover wind power kits and when you make more power than you use the electricity company will reimburse you for the energy!