Photovoltaics 101: Physics of the Photovoltaic Effect The photons are absorbed into the junction, which pushes electrons in the silicon out of the way ( See illustration ). If enough photons are absorbed, the electrons are pushed past the junction and flow freely to an external circuit. When converted to Alternating Current electricity using what is called an inverter, this energy can be used to power anything that uses electricity.
○ ○ ○ ○ Kyocera Quality & High Efficiency Casting Cutting Wafer Slicing Solar cells Solar modules Silicon Vertical integration ⇒ Aims to maximize conversion efficiencies with optimization in all production processes Improvement of conversion efficiencies Improvement of crystalline quality Impurity contamination measures Optimization of slicing conditions Thinner wafers Improvement in quality of sliced material Passivation Reactive Ion Etching (RIE) technology High sheet resistance emitters Improvement of contact metal Optimization of material Optimization of Fabrication process VERTICAL INTEGRATION
Sample of diode function 33% Power Loss 33% Power Loss 100% Power Loss Photovoltaics 101: Cell and Module Construction Effects of shading on cell strings and PV Modules
Source: IREC PV Growth Opportunities This rapid growth places the U.S. behind Germany and Spain as the 3 rd largest global demand center.
Kyocera is a producer of high tech solutions in 8 major categories: - Fine Ceramics - Semi-conductor parts - Applied Ceramic Products - Electronic Devices - Telecom Equipment - Information Equipment - Optical Equipment - Solar Energy 2009 Results: Sales: US$ 11.5B Employees : 59,514 Cash: $3.21B LT Debt: $.331B 51 Years No Loss As of December 31, 2009 KYOCERA: Company Overview Kyocera Corporate Headquarters: Kyoto, Japan Grid Tie PV Power System: 214 kW Array
Unit: B 1300 1000 500 Sales Revenue Operating Profit 1959 2010 2000 1990 1980 1970 FINANCE Economic Keep Profitable Operation Under Any Economic Situation Lehman Shock Oil Shock Economic Bubble Burst Plaza Accord Cuban Crisis Problem LONG TERM BASIS FINANCIAL STRENGTH 51 YEARS NO LOSS
Motto Respect the Divine & Love People Preserve the spirit to work fairly and honorably respecting people, our work, our company and our global community. Management Philosophy To coexist harmoniously with nature and society. Harmonious coexistence is the underlying foundation of all our business activities as we work to create a world of abundance and peace. Kazuo Inamori Founder and Chairman Emeritus KYOCERA Philosophy
Czech Republic Tijuana Tianjin Germany Brazil Australia Singapore China, Beijing Japan Sales Offices Yokkaichi & Yasu Arizona S-Korea Italy India France KYOCERA Solar : Key Benefits Global Production and Sales Module Production Facilities- 1GW Capacity Worldwide San Diego
KYOCERA Solar North American Headquarters and Production (KSI) Headquartered in Scottsdale, AZ, with regional sales affiliates in the Americas and Australia President : Steve Hill KYOCERA Mexicana, S.A. de C.V. (KMX) Tijuana, Baja California, Mexico 2010 Production Capacity 250 MW 2011 Production Capacity 350-400 MW San Diego Manufacturing New Production Line Opened June 2010
Diverse Applications Water Treatment Plant Remote Wireless Networking Site 13MW Solar Field Refrigerated Medical Transporter Commercial Residential
FY 550MW 400MW 300MW 650MW KYOCERA: Production 1GW Unit : MW Yasu Cell Plant – 650MW Road to GW Production
25 YEARS Sakura Solar Center Established : 1984 【 Location 】 Sakura City, Chiba Prefecture 【 System 】 43kW Grid-tie 1,016 Modules 【 Ave. Temperature 】 14.2 deg c REAL DATA BY FIELD TEST
KYOCERA: Proven Performance Duration – 1984 to 2009 Avg. Temp. - 14.2 deg C Annual Solar Irradiation - 1,824.7hrs Harsh Environmental Conditions High Humidity 43kW Grid-tie System 1,016 Modules Established 1984 Kyocera can prove with actual data that it exceeds its performance warranty. Kyocera Sakura Center Pm Degradation (%) ▲ 4.0% 8.0% ▲ Time (year) 5 10 15 20 0.0% 10.0% ▲ 6.0% ▲ 2.0% ▲ Long Term Reliability is Validated 12.0% ▲ 14.0% ▲ 25 ▲ 9.6 % ▲ 4.0%
60cell Mo 2 Support Bar BENCH MARK 72cell Mo No Support Bar KYOCERA 60cell Mo 2 Support Bar No Crack After Load 2400Pa Test Japanese Chinese Manufacturer Manufacturer 12 Crack Cells 21 Crack Cells 12 Crack Cells
KYOCERA CELL STRENGTH Three Bus Bar ( 3.B.B. ) 3.B.B. Feature -> Bus Bar Finer Expand light-receiving area Decrease Resistance + Developed by Kyocera 『 Kyocera Patent Pending 』 More Active Area Less Resistance The World First 3.B.B. Help the Capture of Electricity Generated any Area HIGH EFFICENCY
Glass Breakage Deformation Cu Ribbon Peel Off Cell Crack Detachment Degradation/Leakage Low Durability Degradation/Hot Spot Degradation/Leakage Module Breakage Disconnection Degradation Glass Crash Peel Off Degradation/Leakage Glass Frame String Back Sheet Junction FMEA 1 2 3 4 5 Box Diode 6 Cell Crack Possible Failures & Effect Analysis Factors Causes Possible Failures KYOCERA DESIGN PROCESS Temperature Temperature Temperature Vibration Vibration Load Vibration Load Vibration Load Vibration Humidity Penetration
Vibration Load Analysis Temperature VS. TEMPERATURE 1100kWh/m2 50degree C Wind: 0.1m/s High Low Temp. Simulation CAE 1/3 Model Analysis
Load Temperature Vibration Analysis Vibration Test Vertical Shake Vibration by Wind VS. VIBRATION Horizontal Shake Back & Forth Shake Disconnect Diode Frame Deformation
Load Temperature Vibration Analysis Vibration Test VS. VIBRATION Simulation Validation Test Condition: Long Term Repetition with Load Disconnect Diode Frame Deformation Cell Crack Destruction Test CAE TEST
60CELL MODULE DESIGN 2 Support Bars Middle CAE No Crack Good No Support Bar NG 2400Pa Load Test
Japanese 60cell Mo 2 Support Bar BENCH MARK Chinese 72cell Mo KYOCERA 60cell Mo 2 Support Bar No Support Bar Manufacturer Manufacturer
Alice Springs kWh Comparison at Installation Site Operated by Desert Knowledge Australia Solar Centre Data is compiled by KYOCERA from Desert Knowledge Australia Solar Centre www.dkasolarcentre.com.au kWh Simulation Comparison Proof is in the performance NORTHERN TERRITORY
DKA (Desert Knowledge Australia) KYOCERA 2008/11 2010/4 2009/6 2009/1 2010/1 From 11/2008 To 04/2010 No.1!! DKA (Desert Knowledge Australia): Solar Center located center of Australia 2 7 6 5 4 3 KYOCERA BP (mono) BP (multi) Trina (mono) SunPower (BC) Alice Spring, Australia East Longitude Latitude 133.88 -23.8 Highest kWh/kW kWh Source: Desert Knowledge Australia
PV Source Circuit Array Sub-array Series of Modules Junction Box Combiner Box Transition Box Wet Box DC Disconnect Switch Inverter Power-Conditioning -Unit (PCU) AC Disconnect Switch Distribution Panel Sub-Panel Load Center * * Visible blade disconnect may be required by AHJ and dedicated kWh meter may be required for acceptable “revenue grade” metering. MyGen: System Overview System Block Diagram
MyGen: Drawings Sheet 1: Single Line Diagram Sheet 2: Three Line Diagram Sheet 3: Array Wiring Diagram Drawing set available with Utility disconnect and dedicated kWh meter!
A complete solar monitoring solution - designed by solar professionals for solar professionals. Flexible, powerful, and now shipping with all Kyocera MyGen kits. DECK Confidential – January 2010 Kyocera MyGen Kits & DECK Monitoring
Azimuth (Orientation) acceptable best South-Southeast to Southwest is preferred for best PV performance N - 0 ˚ MyGen: Site Selection http://www1.solmetric.com/tools/RoofAzimTool.htm# Azimuth Angle W - 270 ˚ S - 180 ˚ E - 90 ˚
Pitch (Tilt) acceptable best 15 ˚ to 35 ˚ (3:12 to 9:12) preferred for best PV performance Roofline Altitude Angle (Solar Elevation) Horizon MyGen: Site Selection
- Panel is fed from alternative PV source (NEC230-2(E)) - Panel is fed from alternative PV source (NEC230-2(E)) - Breaker is Back-fed (NEC690-64(B)) - AC System Operating Voltage, and Max Current (NEC690-54) - DC System Label - Voc, Vmp, Isc, Imp (NEC690-53) - DC High Voltage - J-Boxes and separate conduit/raceways - PV System Disconnect for Utility Use - if AC is required by utility (NEC690-14(C-2)) - Photovoltaic System Disconnect if remotely located (NEC690-14(D) and 705-10) - Warning on Disconnects – both sides energized (NEC690-17) - If Ground Fault is present metallic surfaces may be energized and ungrounded (NEC-690-4(C)) Solar PV Application: PV System Labels Don’t forget to personalize your company labels.
Tools of the Trade - Inverter Other tools to use on the job-site . . . □ Torpedo level □ Linesmen style pliers □ Channel locking pliers □ Insulated flat and Philips tipped screw drivers □ Hex head set □ Traditional screw driver set (non-insulated) □ Hole punch set ( to make holes in metal boxes) □ 10 AWG wire stripper □ 8 AWG wire stripper □ Multi meter □ ¾ Pipe bender □ Pipe reamer
Tools of the Trade - Safety Other tools to use on the job-site . . . Roof peak anchors rated to be used as part of a fall arrest system □ 35 to 50 feet of rope rated to be used as part of a fall arrest system □ 5 point full body harness with a D-ring in the front and back □ Rope grab or ascender that is rated to be used as part of a fall arrest system and is suited for the rope being used □ Shoes with good traction to be used to walk on roof surfaces, skate boarding shoes or anything else designed to grip asphalt surfaces □ Isolated shoes or boots to worn when doing any electrical connections □ Safety glasses □ Hard hats □ Work gloves □ Wide brimmed hat for sunny locales
It has been a pleasure . . . Thank you for your time today! Final Questions???
Notes de l'éditeur
Recorded sun hour data for particular locations is used to help approximate the energy produced by a module, as it is the energy from the sun that is converted to energy from the solar module. The amount of Sun Hours for one particular location differs from day to day. There are multiple Sun Hour data sources that slightly differ from one another. The U.S. Department of Energy and NASA have recorded this data for over 30 years and have calculated average daily sun hour data for most locations, which helps predict approximate yearly energy output for that location. This recorded data shows an approximate daily Sun Hour average of 6.5 hours throughout the year for the Southern Nevada location used in this example. The Sun Hours during the summer season average approximately 7.25 hours per day and the Sun Hours during the winter season average approximately 5.75 hours per day.10 These seasonal averages result in an average of approximately 6.5 Sun Hours per day (7.25 + 5.75 / 2 = 6.5). In order to estimate the yearly energy production of a solar module, one simply multiplies the estimated module energy output (from one sun hour exposure-1000W/m2 over one hour), 71 Watt hours AC in this case, by the amount of Sun Hours for the particular location, 6.5. This results in approximately 461 Watt hours AC per day or .461 kWh AC per day. When estimating yearly energy production, the estimated daily energy production, .461 kWh AC, is multiplied by the total number of days in the year, 365.This results in approximately 168 kWh AC energy production. One 100 Watt DC module can be reasonably expected to produce an average of approximately 168 kilowatt hours AC of energy per year under the specified conditions in this example.11 Sun Hours (Southern Nevada ~6.5 avg. daily sun hours); 461-Watt hours AC per day (71 Watt hours AC x 6.5); 168 kWh/year (.461 kWh/day x 365 days)
6 こちらは京セラの一番の特徴である Reactive Ion Etching の紹介です。 一般的には Chemical Etching という手法でセルの表面に低反射加工を施しますが、 京セラの場合、特殊なテクスチャーパターンを施すことにより、皆様ご存知の濃紺セルを製造しております。 右下図にあります、 RIE によるピラミッド型の特殊テクスチャーは京セラの特許となっており、 Chemical Etching テクスチャーとの差は左下の反射率比較グラフをご覧頂ければ一目瞭然かと思います。 この低反射セルが京セラの高効率製品を生み出す要となっております。 次、お願いします。 This figure shows the spectral reflectance of RIE and other textured surface without anti-reflection coating. Blue line is RIE texture, and this figure shows a SEM image of its surface structure. Red line is photolithografically defined wet etching, and this figure shows a SEM image of its surface structure . Light blue line is CZ texture. We can see that the surface reflectance by RIE is very low as compared with the previous structure by photolithografically defined wet etching. Moreover, RIE texture has lower reflectance as compared with CZ texture.
This shows an application for Football stadium of 1.35MW.
Large Range of Inverters 9 models from 1100-5200w Installer Focused Feature Set Integrated Disconnect Wide DC Input Range UL-approved neutral-free installation Optimally Placed Knock-Outs Affordable and flexible data monitoring options First party mypvpower.com FST DECK World-class support 10 year warranty
Large Range of Inverters 9 models from 1100-5200w Installer Focused Feature Set Integrated Disconnect Wide DC Input Range UL-approved neutral-free installation Optimally Placed Knock-Outs Affordable and flexible data monitoring options First party mypvpower.com FST DECK World-class support 10 year warranty
Next, we have to have a way to speak about how the array is oriented to the roof. These terms get tossed around quite a bit, but in general, we talk about the run of the rails. North to South means rails run peak to gutter, and we call this High Profile. East to West means the rails run from eave to eave, also known as Low Profile. THIS IS NOT NECESSARILY REFERRING TO TILTED RACKS.
Next three slides discuss the order and importance of the topics
Next three slides discuss the order and importance of the topics
Next three slides discuss the order and importance of the topics