Frequently Asked Questions
1. What is the most efficient Solar application?
Two answers. For Solar electric systems water pumping is the most efficient. This is because DC
motors are more efficient than AC motors. For solar thermal systems heating water is the most
common solar application and by far the most efficient at an estimated 40% conversion efficiency.
2. What are the rebates and tax credits?
The federal tax credit is 30% and then it will be 10%. Some utility and state rebates do still exist, but the price of solar has dropped significantly so the rebates are not needed as much anymore. The primary financial driver is how expensive is your utility company charging you per kWh. Please see www.dsireusa.org for up to date rebate and tax credit information state by state. Please contact us directly for information about the Japanese market.
3. How much does it cost and when do I break even?
Commercial solar systems are breaking even in a little as 3 years. Residential is 5 to 11 years
depending on how much utility company is charging. Southern California Edison is closer to 5 years.
4. Should I use a tracking system?
Moving parts, so generally no. But, some applications it does make sense. In very sunny areas tracking can increase solar production by more than 40%. In cloudy areas flat is better to catch as much sun when it does happen.
5. What is the best panel orientation? Orientation Factor For Annual Energy Production in California - Source Endecon Engineering
6. Who invented solar panels?
Albert Einstein won the Nobel Prize in Physics for his description of the Photoelectric Effect. According The Nobel Prize: The Nobel Prize in Physics 1921 was awarded to Albert Einstein “for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect”.
From the opening ceremony of the Nobel Prize: “… Similarly, when a quantum of light falls on a metal plate it can at most yield the whole
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