MICROINVERTER - Pushing the Envelope in Technology and Applications. Zhi-MinLing, Ph.D., CEO

Size: px

Start display at page:

Download "MICROINVERTER - Pushing the Envelope in Technology and Applications. Zhi-MinLing, Ph.D., CEO"

Marilyn McGee
6 years ago
Views:

1 MICROINVERTER - Pushing the Envelope in Technology and Applications Zhi-MinLing, Ph.D., CEO

2 OBJECTIVES Why Microinverter? Why APS? Page 2

MICROINVERTER Each PV panel is connected to one microinverter, so each

3 STRING INVERTER VS MICROINVERTER STRING INVERTER PV panels connect in a series to form a string, which then connects to the string inverter. MICROINVERTER Each PV panel is connected to one microinverter, so each panel is independently controlled and monitored. Microinverter GRID METER AC J-BOX Page 3

4 MARKET FORECAST In 2010, 2% of residential PV systems used MLPM solutions. By 2014, that number will reach 38%. In 2010, microinverter installation was about 80MW. By 2014 Microinverter installations will reach 3GW. Page 4

5 MICROINVERTER IN CA. USA (<10KW SYSTEM) Enphase Energy Market Share 3 Month Moving Average; A residential solar installation consists of 5 to 50 microinverters; a small commercial solar installation consists of 50 to 500 microinverters. Page 5

6 MICROINVERTER ADVANTAGES SIMPLE SAFE SMART SAVE RELIABLE POWERFUL Design and installation No high DC voltage Monitor and control each panel No DC component Component and system Maximum power for each panel Page 6

#1 ADVANTAGE: The Safe Solar Solution STRING INVERTER SYSTEMS 600V DC travels between the PV

Lethal to humans High risk of DC arc faults According to UL, almost all PV-related fire

DC output is constant if the solar panels are exposed to sunlight.

7 #1 ADVANTAGE: The Safe Solar Solution STRING INVERTER SYSTEMS 600V DC travels between the PV array and the inverter. Lethal to humans High risk of DC arc faults According to UL, almost all PV-related fire accidents are caused by arcing. DC output is constant if the solar panels are exposed to sunlight. MODULE ARRAY 600V DC STRING INVERTER MICROINVERTER SYSTEMS 220V AC travels between the microinverter and the electrical panel. No danger to humans Low risk of DC arc faults No DC output occurs until the unit is connected to the AC grid. MODULE ARRAY 220V AC Page 7

8 ARCING HAZARD Solar System is very safe, if it s done properly. However, high DC voltage is more susceptible to the arcing risk. Page 8

9 #1 ADVANTAGE: The Safe Solar Solution STRING INVERTER SYSTEMS At emergency, string inverter disconnected from grid, it s no AC output, however, DC side is still 600V-1000V MODULE ARRAY 600V DC STRING INVERTER MICROINVERTER SYSTEMS At emergency, microinverter disconnected from grid, it s no AC output, DC side is only 30V-40V. MODULE ARRAY 40V DC Page 9

10 MICROINVERTERS INCREASE SOLAR POWER OUTPUT MPPT for each solar module No module mismatch power losses No variation effect from tile angle or installation orientation Minimized shading effect Independently-controlled solar modules Page 10

11 Microinverter and String inverter systems 8 250W module with 8 microinverter 8 250W modules with SMA string inverter (Sunpower SPR 3000m) Courtesy: Dr. Yu Ma, Eoplly, July 2012 Page 11

12 Microinverter Compariable Power Production Page 12

13 Page 13 Microinverter

14 2 Cells Covered partial Shading Page 14

15 Page 15 Microinverter

16 Microinverter MI: 2.94kwh (+3.4%) SI: 2.84kwh Page 16

17 Object shading, e.g., chimney Page 17

18 Page 18 Microinverter

19 Microinverter MI: 2.79kwh (+43%) SI: 1.95kwh Page 19

20 Dirty shading, simulated by a semitransparent foil. Page 20

21 Page 21 Microinverter

22 Page 22 MI: 1.69kwh (+27%) SI: 1.37kwh

23 ENERGY HARVEST Page 23 Enphase Microinverter, total 143 systems, 6 months operation data. Microinverter is about 8-10% more than PVWatts predicted, and 16% more than string inverter produced.

24 OBJECTIVES Why Microinverter? Why APS? Page 24

25 At Sunrise, APS POWER UP! Leading the industry in Solar Micro inverter Technology Founded in Silicon Valley, USA The 1 st Microinverter certified in Australia The #1 Microinverter volume shipment in Australia Page 25

26 APS COMPANY GOGRAPHIC PROFILE 5) 02/2012 3) 07/2010 1) 09/2009 2) 03/2010 4) 09/2011 Page 26

27 APS COMPANY MILESTONES Certificates Development Milestones 2010/11 China 4kw 2011/05 China 120kw 2011/09 AU Melbourne 2012/03 Made-in-Washington Page 27

28 RESEARCH AND DEVELOPMENT 40+ R&D engineers, over 60% hold an MS degree or higher. Full range of equipment for product design, simulation, verification, testing, and reliability. Filed 35 patent applications, including 6 PCT applications; 15 granted. APS created the first microinverter product in the world that was certified by CQC, SAA, TUV, and UL. Page 28

(SMT+DIP lines) APS NPI team > 10 years industrial experience

29 Manufacturing Capability EMS Partnership 10 years experiences in communication equipment manufacturing qualified 300,000 capacity (SMT+DIP lines) APS NPI team > 10 years industrial experience Certified ISO9001:2008 Implemented OA and ERP in daily operations Page 29

QUALITY MANAGEMENT SYSTEM QUALITY CONTROL WORKFLOW COMPONENT PCBA ASSEMBLY BURN- IN(50C, 24h, po wer on) PACKING & SHIPPING Page 30 IQC Incoming Quality Control

30 QUALITY MANAGEMENT SYSTEM QUALITY CONTROL WORKFLOW COMPONENT PCBA ASSEMBLY BURN- IN(50C, 24h, po wer on) PACKING & SHIPPING Page 30 IQC Incoming Quality Control X-ray Soldering quality control E-Test IC chip placement quality control Inspect Assembly quality control Final Tests Functional, perfor mance, and safety tests

Implemented advanced digital, high frequency, low power, embedded

31 DESIGN FOR RELIABILITY 20 years of experience in microelectronics design and manufacturing in silicon valley. Implemented advanced digital, high frequency, low power, embedded software and solid state technology in product design Used thermal conductive potting materials Page 31

32 TECHNOLOGY ROADMAP GEN-4 Microinverter GEN-3 YC500 YC200 ECU-1/2 ECU-3 ECU-4 Energy Management Page 32

33 PRODUCT ROADMAP YC200 Cost ( normalized ) YC250 YC Unit vol power (watt/cm^3) 30% cost reduction,50% vol/watt reduction Page 33

YC250 M215 P235 L(CM) W(CM) H(CM) V(CM^3) Ratio APS YC250 16.

34 YC250 - ACM PREFERED CHOICE Light Small Thin High reliability Low cost. YC250 M215 P235 L(CM) W(CM) H(CM) V(CM^3) Ratio APS YC % Enphase M % SolarBridge P % Page 34

YC500 THE PREFERED CHOICE L(CM) W(CM) H(CM) Vol(CM^3) Ratio APS YC500 22.0 16.4 2.5 900.

35 YC500 THE PREFERED CHOICE L(CM) W(CM) H(CM) Vol(CM^3) Ratio APS YC % Enphase D % Enecsys D480W % Page 35

36 YC500 ARCHITECTURE 太阳能板 YC500 太阳能微型逆变器系统框图 DC to DC Each panel has its own independent MPPT and monitoring features. 控制信号 DC to DC DC to AC EMI 滤波太阳能板交流市电电板数据采集控制信号电板数据采集光耦隔离控制信号 FPGA 控制芯片电网数据采集 Page 36

37 COMMUNICATION PLATFORM (MI -> ECU) Microinverter to ECU: Power Line Carrier (PLC) Page 37

38 COMMUNICATION PLATFORM (ECU - SERVER) ECU (data) to Server (3 options): LAN, WiFi via Router to Server GPRS to Server Page 38

39 EMA OPERATION SYSTEM & DISPLAYS OS Android EMA Display Devices PC Ipad/ Iphone GalaxyS3 Page 39

40 Page 40

41 APS MICROINVERTER MONITOR CURVES AC output (W) AC Output (V) Output (kwh) DC Iuput (V) DC Input (I) Internal Temp (C) Page 41

42 COMPREHENSIVE RELIABILITY TEST IEC61215 stress test cumulatively on 4 samples Humidity Freeze Damp Heat Temp Cycles 85C/85% RH 20hrs,-40C 4hrs,10 cycles 85C/85% RH 1000hrs -40C ~ +85C, 200 cycle; Performance and safety Test No Degradation : Δ eff < 0.15% Page 42

43 STARTUP TEST Perform startup test for -40C~+65C, NO failure for ~100k times. Page 43 10/10/2012

44 Hi-TEMPERATURE OPERATION High-T operation, at full AC power output, for 2000 hrs +65C,220W Pac No degradation after 2000hrs UID AC Output Power Factor THD Efficiency (%) power (W) # # # # Page 44 10/10/2012

45 YC200 TEMPERATURE IN ROOFTOP SYSTEM Max Ambient air temperature: in noon is ~37oC) Max Microinverter Internal Temp: 62oC Page 45

46 Efficiency APS YC500 EFFICIENCY 100% APS YC500 Efficiency 95% 90% 85% -40C +25C +65C 80% AC Output Power(W) Negligible temperature dependence Page 46

47 THE MICROINVERTER COMPANY RECENT PROJECTS - EXAMPLES

48 Page 48 Queensland -RESIDENTIAL ROOFTOP

49 Page 49 Melbourne 20KW COMMERICAL ROOFTOP

50 MADE-IN-WASHINGTON Collaborated with partners in Washington State Qualified as Made-in- Washington Microinverter Installed 100+ systems in Washington State in last 3 months. Page 50

USA. The project locates in Grow Community which would

51 APS AT OnePlanetCommunity, USA APS chosen for largest net zero residential project in the Pacific North West, USA. The project locates in Grow Community which would be the biggest Zero-Carbon community in WA by Page 51

52 Page KW OFFICE BUILDING ROOFTOP

53 Page 53 LEATHER SHOPPING MALL 300KW SYSTEM

54 SYSTEM ELECTRICAL DRAWING 22 panels per string. AC combine box grid connected combine box. Page 54

55 Page 55 POWERED BY 600 YC500 MICROINVERTER

56 Page 56 AC COMBINER ONLY (NO DC)

57 Page 57 AC COMBINER ONLY (NO DC)

58 Page 58 COMUNICATIONS (ECU + GPRS)

59 Page 59

60 Page 60

61 THANK YOU!

Micro-Inverter. Corporate and Product Presentation. AEconversion GmbH & Co. KG. Micro vs. String. Product Details. USPs. Market Overview.

Micro-Inverter. Corporate and Product Presentation. AEconversion GmbH & Co. KG. Micro vs. String. Product Details. USPs. Market Overview. Micro-Inverter Corporate and Presentation AEconversion GmbH & Co. KG Inverter Modular MPP-Tracking Infinite Scalability Shading Module Mismatching and Orientation Reduced Fire Hazard Initial Cost Harvest