Simply put, the “energy conversion efficiency” of a solar cell is a measure of input vs. output. If 100 percent of the sunlight energy striking a solar cell could be converted into electrical energy, the cell would be “100 percent efficient.” However, the laws of physics apply to everything. Some energy always escapes through heat and reflectance — and efficiency is taxed further when individual cells are connected to form a usable solar “module.”

Today’s best-selling modules typically range from 12 to 18 percent in efficiency. Tremendous R&D investments throughout the industry keep these efficiency ratings rising. Companies like Kyocera pursue efficiency improvement as a strategic priority, because in the long term, better efficiency will make solar energy feasible in more and more applications. For these reasons, as buyers seek a common metric for comparing solar modules, it is natural to ask: Should efficiency be that metric?

Efficiency and Cost
For years, energy conversion efficiency was the most important variable influencing the cost of solar power. This was especially true when the raw materials for producing solar cells, like highly purified silicon, were in short supply. Greater efficiency meant getting the same amount of power from less silicon. However, the industry has evolved rapidly in recent years. Silicon supplies have expanded dramatically and their cost has stabilized. Finally, mass production has created unprecedented economies of scale — influencing the price of solar power more than the cost of raw materials. In fact, the declining price of solar modules over the past five years has had almost nothing to do with improvements in energy conversion efficiency.

Where Solar Efficiency Matters Most
Improving energy conversion efficiency is a strategic priority for most solar module manufacturers because it holds the key to opening new applications for photovoltaic technology. Efficiency improvement helped bring solar electricity out of the lab and into the NASA space program in the 1960s. It helped create terrestrial applications for solar energy in the 1970s, and it also enabled residential and commercial solar power starting in the 1980s. The dream of solar energy costing less than conventional power will be achieved someday, in part, through better efficiency. But what about today?

Today, solar modules with higher efficiency ratings generally cost more. Because of this, buyers may equate efficiency with quality and reliability, although they are not necessarily related. They may also assume that installing higher-efficiency solar modules guarantees you’ll produce more power. But is this really the case? In a word, no.

For today’s consumer, module efficiency matters most where space is limited. Obviously, your rooftop system can’t be larger than your roof. If the available space isn’t enough to meet your power goal, then you may need higher-efficiency modules. But for the needs of most home and business applications, space is not the limiting factor. In some cases, in fact, a user could install a greater number of lower-efficiency modules and actually produce more energy for the same total investment. It pays to compare.

What Are You Actually Buying?
For the consumer, it’s crucial to understand what you’re actually buying when you install a solar electric generating system. You’re buying electricity, measured in kilowatt hours. It is not the efficiency rating that runs your appliances; they run on kilowatt hours. For this reason, if you’re considering solar power, estimating the system’s long-term, real-world output, in kilowatt hours, is much more useful than comparing efficiency ratings.

The Dashboard Analogy
One helpful analogy is the dashboard of your car. The speedometer measures speed at any given moment, the way “instantaneous output” may be measured in a solar installation. Like a car, which rarely (if ever) operates at top speed, your solar installation reaches “peak rated output” only on the best part of the best sunny day.

A car’s odometer measures miles traveled, the way a solar electric system measures “kilowatt hours produced.” This is the most important gauge of a solar installation’s usefulness. Kilowatt hours are the power you use. If you can accurately estimate the number of kilowatt hours a system will produce in a year, you can estimate when your investment will pay for itself.

A dashboard “miles-per-gallon” readout displays your car’s efficiency. In a car, this is a very useful rating, since it tells you how far you can go on a gallon of gas. But on your roof, efficiency does not predict how many kilowatt hours a solar module will generate. In fact, two 300-watt modules with different efficiency ratings should generate the same amount of power, given the same sunlight exposure. For today’s buyer, the main difference is size — the higher-efficiency module is slightly smaller than a lower efficiency module of the same wattage.

Getting What You’ve Paid For
In the end, the “return” you receive from investing in solar power depends on three variables: cost, annual power production, and longevity. Your installer can inform you of the first – the cost to install and maintain your system over its expected lifespan. Your installer can also estimate the system’s annual production of kilowatt hours, which can help you estimate how many years it will take to recoup your investment. But what about longevity? Can you trust a 25-year warranty from a manufacturer that has only been in business a few years? This may be the most important question.

Fortunately, you can review unbiased research analyzing the performance of various technologies and brands side by side, and form your own conclusions.

Desert Knowledge Australia Solar Centre
Some of the most advanced research in real-world solar performance is publicly available from the Desert Knowledge Australia Solar Centre (DKASC), an independent demonstration facility for commercialized solar technologies. This government-funded public showcase features a broad range of solar power technologies from manufacturers like BP Solar, First Solar, Kaneka, Kyocera, Sanyo, Shurjo, Sun Grid, Sunpower and Trina Solar. Observing different solar installations under the same real-world conditions allows meaningful comparisons of performance among various brands. You may be surprised by what the data show. Anyone can view live data feeds comparing the performance of various solar technologies at no charge. Visit www.dkasolarcentre.com.au for more information.

In summary, if you’re shopping for solar, don’t get distracted by peak ratings or efficiency percentages. These are calculated under laboratory conditions and may not predict your system’s real-world performance.

Look for a solar module that delivers the most kilowatt hours per installed kilowatt — with minimal degradation over time. Has the manufacturer been around long enough to see its earliest products go out of warranty? Are its oldest modules still delivering trouble-free performance? Will that manufacturer still be around in another 25 years? The answers to these questions will predict your satisfaction better than any individual performance rating.

Written by Cecilia Aguillon, Kyocera Solar, Inc. Cecilia Aguillon is director of market development and government policy for Kyocera Solar, Inc.

Much anticipated KD 315 is Kyocera’s highest output module to date

SCOTTSDALE, Ariz.- Kyocera Solar, Inc. today announced the launch of its highest-output solar module, the 80-cell KD 315. The new module is ideal for large-scale installations like solar-covered parking, and is now available for U.S. customers.

With a 37-year history of solar innovation and cutting edge technologies, Kyocera continues to display its commitment to quality and reliability with the release of the KD 315. Designed for high output, safety and ease of installation, the UL certified KD 315 modules feature a UV stabilized, aesthetically pleasing black anodized frame; easily accessible ground points; proven junction box technology with 12 AWG PV wire to work with transformerless inverters and quality locking plug-in connectors for quick connections.

Continuous improvement, a cornerstone philosophy for Kyocera, has been a driving force for the company, contributing to its milestone accomplishment of being the only solar module manufacturer to pass rigorous long-term testing performed by TÜV Rheinland — and repeatedly achieving world record cell efficiencies.

“Kyocera’s KD 315 is an outstanding solution for large-scale installations that demand top quality, high output photovoltaic modules,” stated Steve Hill, president of Kyocera Solar, Inc. “By combining higher output per unit with Kyocera’s superior field performance, KD 315 modules can offer system owners an even greater return on investment.”

About KYOCERA

Kyocera Corporation (NYSE:KYO) (TOKYO:6971) (http://global.kyocera.com/), the parent and global headquarters of the Kyocera Group, was founded in 1959 as a producer of fine ceramics (also known as “advanced ceramics”). By combining these engineered materials with metals and plastics, and integrating them with other technologies, Kyocera has become a leading supplier of solar power generating systems, telecommunications equipment, printers, copiers, electronic components, semiconductor packages, cutting tools and industrial ceramics. During the year ended March 31, 2011, the company’s net sales totaled 1.27 trillion yen (approx. USD15.3 billion). The company is ranked #604 on Forbes magazine’s 2011 “Global 2000” listing of the world’s largest publicly traded companies.

In recent years the solar energy market has seen extensive growth and undergone massive change. With so much fluctuation in the market landscape it becomes increasingly difficult for end-users to know where they can place their trust; particularly concerning a major purchase like solar energy which requires a long-term return on investment. Kyocera Corporation (President: Tetsuo Kuba) has been a pioneer in solar energy technology for more than 35 years, and is known for the outstanding quality of its solar modules. Furthermore, the company boasts a number of real-life installations that have been consistently producing electricity for more than 25 years. These installations provide evidence of the exemplary reliability of Kyocera modules — a track record of both Kyocera’s commitment to the market and its reliable product life.

Two aspects of major importance for any solar module are energy conversion efficiency and product life. As a pioneer in multicrystalline silicon solar cell manufacturing technology with one of the highest conversion efficiency rates in the industry, and with a longer track record than the vast majority of market players, Kyocera points to a number of case studies from around the world which demonstrate its modules’ long product life and quality.

1. In 1984, Sweden’s first grid-connected photovoltaic system was built in Stockholm. Since its installation, the façade-mounted 2.1kW system has been continuously and reliably providing the residents of an apartment building with environmentally-friendly electricity. The modules’ average annual power generation performance is still reliable — with no significant change since the system was installed 27 years ago.
2. Also in 1984, Kyocera established its Sakura Solar Energy Center just outside of Tokyo. At the time, the Center was equipped with a 43kW solar power generating system which to this day continues to generate a stable amount of power for the facility.
3. In 1985, Kyocera made a donation of a 10kW solar power generation system to a small farming village with no electrical infrastructure located at an elevation of 2,600m (8,500ft) in Gansu Province, China. In 1993, the area received electrical infrastructure, and the solar modules were moved to a regional research facility for clean energy, where after more than 25 years, they are still producing consistent levels of electricity.

In the U.S., nearly all solar module manufacturers offer a product warranty of 20 years or more, but very few have been in business that long. When end-users are considering implementing solar energy at their home or business, it is important to factor in whether the product will indeed last as long as promised, and if the company offering the warranty will still be around to honor it. With long-term field results to stand on and over 35 years of solar research, development and manufacturing, Kyocera’s track record provides end-users with confidence on both accounts.

SPG Solar – a leading national solar energy company – designed, engineered and constructed the 620kW system that spans two rooftops and five solar carports, using Kyocera KD 235-watt solar panels. Perpetual Energy Systems financed the system through a Power Purchase Agreement under which PLNU will purchase the electricity produced at a predetermined rate over 20 years.

Concurrent to the PV system’s construction was the installation of a 54 kW solar water heating system by Adroit Solar, an integrator of solar thermal systems. The system will provide an estimated 940 gallons of hot water a day to the student dorms and save the university $5,000 annually on utility bills. The project was financed by the Student Green Fund, a $5 semester fee initiated by students to provide funding for sustainability efforts on campus.

The two projects, which include more than 2,600 Kyocera solar panels, are expected to produce over 917,000 kilowatt-hours annually and provide a savings of up to $1.6 million over the next two decades.

What the partners are saying about these innovative solar projects:

“PLNU strives to be forward thinking and take a leadership role in sustainability efforts and environmental stewardship,” said Dr. Bob Brower, president of PLNU. “The stewardship of resources is one of our core values. It was through the strong partnership with Kyocera, SPG Solar, Perpetual Energy Systems, and Adroit Solar that we were able to expand our solar portfolio.”

“SPG Solar values its great partnership with Point Loma Nazarene University, to date installing nearly 1 megawatt (MW) of solar power on the campus,” said SPG Solar CEO & President Chris Robine. “Through the dedicated support from the students, faculty and staff, PLNU is a leader and preparing for the future – securing predictable energy rates and enriching the educational experience for the students with this cross campus solar power system.”

“PLNU is one of the most innovative universities, filled with students and faculty who are driven by energy, water and resource conservation. We applaud their decision to install a solar thermal system, which further showcases their sustainability efforts and provides consistent financial savings for years to come,” said Jim Backman, President of Adroit Solar.

“Recognized for its leadership in the area of sustainability, PLNU has joined a growing number of environmentally conscience academic institutions whose investment in clean solar generated-electricity will benefit future generations,” said Steve Hill, president of Kyocera Solar, Inc. “PES is proud to count PLNU among the ranks of universities that clearly understand the benefits of hosting solar energy through power purchase agreements,” said Michael Streams, Senior Vice President of Perpetual Energy Systems.

In an effort that brought together San Diego-area partners, the construction was completed by Independent Energy Solutions, Inc. of Vista, Calif., using 1,680 Kyocera KD240 solar modules produced at Kyocera’s San Diego manufacturing facility. Mounted on a carport structure on a campus parking building, Independent Energy Solutions designed the system to resist wind uplift and to mitigate seismic concerns, providing added assurance for long-term efficiency and adaptability. The utility-tied system has an expected yearly power production of 583,267 kilowatt hours (kWh) — enough energy to power almost 100 area homes each year.

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MyGen Systems, the pre-engineered kits produced by Kyocera Solar, have long been the best—and easiest—choice for turn-key, rooftop solutions. Now, owing to industry growth and escalating electricity rates, Kyocera is proud to announce the MyGen™ Ground Mount Solution.

Why consider a Ground Mount?

• Lack of available space on roof
• Poor roof orientation
• Poor sun exposure on roof due to shadows
• Need for a larger system than roof can support
• Available land with a clear view of the sky
• Ease of access to solar array for cleaning and snow removal
• Preservation of “curb appeal” of home

A common misconception is ground mounted systems require a lot of space. In fact, a 10kW ground mount system, which generates more than enough electricity to run the average U.S. household, can be installed in a space as small as 50′ x 20′. This is ideal for those with significant or growing energy needs. Ground mount systems are adaptable and can easily be extended to add more panels to provide more renewable energy.

Kyocera Solar partners with HatiCon.

Kyocera has selected the HatiCon racking system for our Ground Mount Solution. While a wide variety of racking options are available, HatiCon fulfills the following criteria for MyGen:

• Ease of installation and low parts count
• Sturdy, high quality components
• Low cost
• All-in-one delivery: no extra parts to buy

The HatiCon structure is optimized for easy assembly with a flexible forgiving foundation, pre-assembled components, and allows for module inclination from 0° to 35°. The structure utilizes a proprietary bearing in conjunction with adjustable vertical posts to eliminate footing inconsistencies and problems. This significantly reduces the need for intensive site surveying and allows the racking to follow a landscape harmoniously. HatiCon’s proprietary Sigma post can be rammed into soil or cast into concrete footings to serve as the ground interface for the system. This eliminates the need for pipe procurement – a very expensive component in most ground mount installs.

The MyGen Ground Mount Solution will be available in September in select sizes for both residential and lite commercial.

For more information on our MyGen program or to sign up contact us today at: yessica.vargas@kyocera.com.

Recently, TÜV Rheinland, the leading—and toughest—provider of product testing completed rigorous performance testing on a number of solar modules from different manufacturers. The Kyocera Solar module is the only module that passed these grueling long-term tests. The only one! The veritable king of the performance hill!

We’ve always known that Kyocera modules outperform the industry. Now we have definitive proof. Visit kyocerasolar.com and find out what makes our modules so tough.

Designed and installed by NJ Solar Power, LLC on property owned by the Masons since the mid-1800s, the photovoltaic system consists of 5,656 Kyocera KD205 modules. The panels are ground-mounted in a single, contiguous design utilizing UniRac structures and four PV-powered, PVP 260-480 inverters.

With an estimated yearly power production of 1,547,412 kilowatt hours (kWh), the utility-tied system is enough to power 145 average homes. The site required special zoning permits to guarantee the protection of the buildings and surrounding landscape.

A power purchase agreement (PPA), provided by Solar Power Partners, Inc. (using
institutional financing and Solar Renewable Energy Certificates) will allow the Burlington Property to purchase the electricity without incurring the initial cost of system installation. The project is the latest in a series of east coast installations for Solar Power Partners, a Larkspur, California-based developer and owner.

The full-service integrator — NJ Solar Power — was the east coast workforce for this project and will continue to service the Masons throughout the life of the solar panels.

“Our company is committed to providing cost-effective energy that is environmentally and socially responsible, as are our partners in the project: Kyocera and Solar Power Partners,” stated Bill Hoey, CEO of NJ Solar Power. “This bicoastal collaboration proved highly successful and will yield excellent results for the Masons.”

The conversion to solar energy also serves as a cost-cutting measure for the Burlington
Lodge Masons.  “The Masons have a long history of being responsible global citizens — their conversion to solar energy will minimize both their carbon footprint and utility expenses,” commented Bob Powell, President and CEO of Solar Power Partners, Inc. “Making the PPA available for the members of the Burlington Lodge ensures that they will have access to clean energy at a stable rate for years to come.”

As the cost of traditional fossil fuels increase, so does the market for sustainable energy solutions. Kyocera, with a 35-year history of innovation in the solar industry, continues to provide high quality solar modules to meet this global demand.

“To meet increasing market demand, Kyocera continues to seize opportunities for growth and innovation in solar energy while developing key partnerships with industry leaders to provide clean alternatives to fossil fuel-generated electricity,” said Steve Hill, president of Kyocera Solar, Inc. “The Masons’ progressive approach in converting their historic facilities to renewable energy and working with Solar Power Partners and NJ Solar Power made this a rewarding venture.”