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Σχετικά με τα φωτοβολταικά

Με τον γενικό όρο Φωτοβολταϊκά ονομάζεται η βιομηχανική διάταξη πολλών φωτοβολταϊκών κυττάρων σε μία σειρά. Στην ουσία πρόκειται για τεχνητούς ημιαγωγούς (συνήθως από Πυρίτιο) οι οποίοι ενώνονται με σκοπό να δημιουργήσουν ένα ηλεκτρικό κύκλωμα σε σειρά. Οι ημιαγωγοί αυτοί απορροφούν φωτόνια από την ηλιακή ακτινοβολία και παράγουν μια Ηλεκτρική τάση. Αυτή η διαδικασία ονομάζεται"Φωτοβολταϊκό φαινόμενο".

Τα φωτοβολταϊκά ανήκουν στη κατηγορία των Ανανεώσιμων Πηγών Ενέργειας (ΑΠΕ). Στην κατηγορία των ανανεώσιμων ηλιακών πηγών ενέργειας, τα ηλιοθερμικά συστήματα είναι πιο αποδοτικά από τα φωτοβολταϊκά[1][2].




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Uncovering Green Alternative Energy Mutual Funds , νέα, ειδήσεις

Uncovering Green Alternative Energy Mutual Funds

Δημοφιλέστεροι Όροι:
Not all alternative energy mutual funds are created equal. In a recent interview with the Wall Street Journal, a reporter asked me which alternative energy mutual funds were the most focused on renewables, noting that many mutual funds hold non-energy related companies such as Apple, PepsiCo and Google. The answer to this question is not as straight forward as one might think. This article sorts out which mutual funds are truly invested in the dynamic and growing green energy sector, and which ones are more peripheral. Greener Than Thou–Revealing How Much a Mutual Fund is Focused on Alternative Energy Despite the desire of many investors to keep their portfolios clean of polluting investments, there is no perfectly pure alternative energy mutual fund. There is, however, a wide range of how focused the different green mutual funds are on alternative energy. Finding out which mutual funds have the highest concentration of alternative energy investments takes a multipronged approach. First, the Roen Financial Report scrutinizes the prospectus of each fund to see if its principles align with alternative energy investment goals. Second, for each company that the mutual fund holds, the annual report and financial filings are thoroughly examined to determine exactly how much of a company’s operations are related to the various green sectors that the Roen Financial Report covers: energy efficiency, environmental*, fuel alternatives, smart grid, solar and wind. Sometimes it is easy to tell whether a mutual fund holds stocks that are in one or more of the alternative energy sectors, but in other cases it is not so obvious. Clearly, pure play companies like First Solar, Inc (FSLR), Renewable Energy Group Inc (REGI) and SolarCity Corp (SCTY) are stocks that alternative energy investors are seeking. There are other companies, though, that have alternative energy products and services as part of their business model, but those operations are not the company’s bread-and-butter. For example, Johnson Controls (JCI) is a large industrial conglomerate that has two business units which address alternative energy themes — building efficiency and renewable power solutions. I estimate that alternative energy accounts for perhaps half of JCI’s revenues. Interestingly, shares of JCI are owned by 8 out of 12 alternative energy mutual funds, more than any other single company. Another example of a company with partial alternative energy operations is Valmont Industries (VMI). Valmont manufactures support towers for wind turbines, anemometers, power line transmission, mass transit poles, lighting and related structures. This company cannot be ignored — its contribution is critical to the infrastructure needed to support utility-scale solar, wind and smart grid projects that will continue to be built over the coming decades. However, my analysis attributes an estimated 15 percent of Valmont’s current earnings are a result of alternative energy projects. Google is another company that blurs into alternative energy, though it is obviously not its main business. Google realizes that it is basically an electricity-based service — no electricity, no Google. Because of this, Google has made a significant commitment to moving toward a more clean and sustainable electric supply. Google has moved on this in no small way, having invested in over $1.5 billion in wind and solar projects. In order to simplify the analysis of how much of a company’s business relates to alternative energy, only the stocks needed to reach at least 50% of a fund’s weighted holdings were included (or at a minimum, the fund’s top 10 holdings). Also, two mutual funds that the Roen Financial Report tracks were left out of the rating system, Allianz RCM Global Water A (AWTAX) and Calvert Green Bond A (CGAFX). AWATX invests in stocks and securities engaged in water-related activities, a sector related to green energy but with more of an environmental focus. Calvert Green Bond is another good choice for green investors, but is a different kind of animal than a stock fund, so it is hard to make an apples-to-apples comparison. Its prospectus sates that investments include: …securities of companies that develop or provide products or services that address environmental solutions and/or support efforts to reduce their own environmental footprint; bonds that support environmental projects; structured securities that are collateralized by assets supporting environmental themes; and securities that, in the opinion of the Fund’s Advisor, have no more than a negligible direct environmental impact, which may include securities issued by the U.S. government or its agencies, and U.S. government-sponsored entities. The Greenest Alternative Energy Mutual Funds Three funds clearly top the list of having the greatest alternative energy focus: Firsthand Alternative Energy (ALTEX), New Alternatives (NALFX) and Guinness Atkinson Alternative Energy (GAAEX). These funds have a high concentration of alternative energy investments, and strongly focused investment principles.

Δημοφιλέστεροι Όροι:
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