Suntech Power Cutting-Edge Technology

Suntech Power Cutting-Edge Technology

Basics Key Parameters of Wem Module Integration of innovative technology STP 275-20/Wem STP 270-20/Web 265-275 Wp nominal power module efficiency up to 16.9 % mono crystalline cell technology (4 bus bars) 60 cells / 6 inch (156 x 156 mm) universal format design 1640 x 992 x 35 mm 18.2 kg weight silver frame and white backsheet (Wem) black frame and black backsheet (Web) waterproof level IP 67 Junction Box original MC4 connectors 2

Basics Key Parameters of Wem Module

Basics Key Parameters of Web Module

4-Busbar Design tab-strings and fingers 4-Bus-bars, one extra tabstring, same lightabsorbing area! Standard New Extremely fine electrodes (fingers) on the cell leading to larger effective cell surface. Standard NEW

4-Busbar Design how it works better Reduced internal electrical resistance, boosted cell output! 4 bus bar cell 3 bus bar cell

4-Busbar Design why it is more durable Less chance of micro-crack, lower hotspot risk in field and thus more power generated in 25 years More residual stress, higher chance to have micro-crack 4-Busbar design has 15% less stress compared with 3-busbar, 25% less stress compared with 2-busbar Residual Stress High Residual Stress 10% 15% Residual Stress on the Bus-bar Low From 2-bus bar cell From 3-bus bar cell From 4-bus bar cell

Highly Reliable s. Best These components ensure that our modules are reliable and efficient: Rigid frame: a hollow chamber profile ensures rigidity and high performance State-of-the-art solar glass: antiglare and self-cleaning for maximum output and low maintenance effort High-tech material EVA: highly transparent to provide an extremely stable connection of components Innovative cells: developed and produced by Suntech for high and reliable yields Water-proof junction box: certified pursuant to IP67 (the standard being IP65), high waterproofness and ruggedness Solid back sheet: high level of UVA resistance a solid basis delivers solid output

1. Stable but also Light Weight Frame Hollow Chamber Aluminum Alloy Frame Design : less weight per m²reducing static loads requirement for industry roofs where every kg counts improved handling and easier installation Provide various installation way to pass 3800pa wind load and 5400pa snow load Suntech (Wem) Trina Yingli CSI Hanwha Solarone Weight (kg) 18.2 18.6 18.5 18.5 20.0 Wind load/snow load (Pa) 3800/5400 2400/5400 2400/5400 2400/5400 2400/5400 Data source: datasheet on website (update date: 2014 Q1) Less weight, Easier to handle on rooftop

2. Anti-Reflective Coating Glass Constantly high performance: coating/temped process creates durable SiO2 based glass film directly fused to the glass ensuring high durability enhanced sunlight absorption, with minimal reflected light

2. Anti-Reflective Coating Glass Durability and good performance for desert areas Test description: module front/back side; Test temperature: 63 ±2 o C, Particle size: average 250µm, wind speed:9 ±2 m/s (Simulated environment in Saudi Arabia) Light Transmission 95 94 Sand Blowing Test Suntech A Non-AR B 93 92 91 90 Sandstorm volume Passed SGS Sand-Blowing Test

3. High Volume Resistant EVA Effectively prevent PID : High volume resistant EVA could limit the movement of the sodium ions from the cell surface to glass 100.00% 80.00% 60.00% 40.00% Power degradation of PID test with different EVA under double 85/96 hours test 72.75% 20.00% 0.00% 1.95% 1.68% Market standard EVA Suntech choice Ⅰ Suntech choice Ⅱ

4. Four Busbar Solar Cell Higher EFF., lower internal resistance Internal electrical resistance is reduced and effectively boosts the cell output. Because the distance between bus bars are shorter, the flow of electricity faces less resistance along the electrodes. Normal busbar Optimized cell design (4 bus bar) Thinner busbar Lower hotspot rate, more reliable The increased number of bus bars per cell enable a more uniform dispersion of stress on the tab. As a result, cells are more durable than before. Meanwhile, less loss caused by micro-cracks.

5. Anti-UV Capability of Backsheet Suntech uses backsheet which passed long-term UV test: Long term UV test is designed to simulate 25-year accumulated UV exposure in EU environment module failed with yellowing backsheet effect Suntech `s Yellowing Back-Sheet

5. Anti-UV Capability of Backsheet Extend UV test ensure Suntech select best materials : Extended UV test (at least 60kWh/m2): Subject samples to a total UV irradiation of at least 60kWh/m2, at least four times of IEC 61215 requirement of 15kWh/m2. Initial UV 15kWh/m 2 UV 30kWh/m 2 UV 45kWh/m 2 UV 60kWh/m 2 YI=2.30 YI=18.61 YI=28.59 YI=37.43 YI=44.19 Backsheet 1 Fail Backsheet 2 Pass YI=0.61 YI=-0.19 YI=0.65 YI=-0.36 YI=0.29

6. Junction and Cable Testing @Suntech Mechanical test (housing and cables strength) Waterproof and humidity tests IP67 standard test

Excellent Weak Light Performance Suntech s patented Edge Insulation Process increases R SH special cell treatment removing unfavorable phosphor particles along the cell edges without this process step: leak current power loss increase of the shunt resistance R SH the higher RSH the more energy goes into the electrical load current always follows for the route of lowest resistance Did you know that 2/3 of yearly average irradiation is weak light in Nothern EU?

kwh / kwp Excellent Weak Light Performance Suntech (East-West) vs. German Brand (South) both installations are in the South-West of Germany (distance ~ 20 km) installation angle of both PV systems: 15 180 160 140 120 100 Suntech German Brand Specific yield Suntech: 1036,71 kwh/kwp* German Brand: 1010,81 80 60 kwh/kwp* 40 20 3% higher yield 0 Jan Feb Mrz Apr Mai Jun Jul Aug Sep Okt Nov Dez although Suntech is facing significantly worse conditions

Extended Wind & Snow Load Tests Enhanced system safety : according to internal and VDE confirmed tests Suntech increased the wind & snow loads capabilities underlines that Suntech offers high quality and high resistant modules performing under more demanding conditions Normative requirements (IEC): Wind load : IEC = 2400 Pa Suntech = 3800 Pa ( ~ 162 km/h) Suntech`s internal wind tunnel test Snow load: IEC = 2400 Pa Suntech = 5400 Pa ( ~ 550 kg/m²) Source: http://www.photovoltaik.eu

Extended Wind & Snow Load Tests Clamping on the short side: 2.400 Pa Due to stability issues, only a few other manufacturer allow to clamp the modules on the short side Reduced BOS costs vs. clamping on the long side of 20-25%. Did you know, that a layer of 2,5 m of wet snow weighs 890 kg? Due to the great stability of Suntech modules, this load can be placed on our modules without any damages. 890 kg

Suntech s Current Sorting Optimizes the system performance: in a serial connection the weakest current determines the total strength of current in the string example of STP250S-20/Wd, taken from a customer flash list: *The effective average is lower than 250 Wp caused by miss-matches of unsorted modules (loss up to 5 Wp)

Suntech s Current Sorting Current Sorting reduces miss matches presorted modules have a smaller delta within the string without current sorting the installer gives away power higher specific yield helps to increase Return on Investment *The effective average is above 250 Wp thanks to Suntech s current sorting benefit

Suntech s Current Sorting installed capacity without current sorting: installed capacity with current sorting: 24,5 kwp 25,1 kwp Δ 0,6 kwp + 2,4% Roof angle = 30 orientation = south location = Munich, Germany, * Suntech takes no responsibility for errors and/or omissions with regards to the content

Suntech s Current Sorting Example calculation for a large project in Germany (Finow I) Installed capacity: 24,24 MW Annual eneryg yield: 22,4 Mio. kwh Location Finow (Berlin) 89.790 poly crystalline 270/Vd panels 2,4% means in : = ~ 15.400 / year = ~ 385.000 / 25 years

Suntech s Current Sorting Every Suntech module is marked with a sticker Three different classes ensure the best current match I1, I2 and I3 Each individual current class has no difference in average module quality or performance to adjacent current classes Only one current class per pallet Did you know, that Suntech was the first manufacturer offering current sorted modules? Still Suntech is one of really few manufacturer providing this service free of charge.

Summary of the benefits for Wem Low Resistance 4 bus bars, the unique design of solar cell, leads tremendous reduction in electrodes resistance Excellent module efficiencies Module efficiency up to 16.9% achieved through advanced cell technology and optimal manufacturing capability Suntech standard product benefits Positive power tolerance Other companies warrant the specified power +/- 3 %. From us, you receive up to 5 % more. Approved for increased wind and snow loads Suntech modules withstand suction loads of up to 3.800 Pa and snow loads of 5.400 Pa Excellent weak light performance Constantly high yields even in case of shades, on cloudy days, or in the morning or evening. Power-optimized current sorting Our module sorting by amperage ensures easy, time-saving and performanceoptimized installation with up to 2 % higher yields.

Customer Friendly Power Warranty over 25 years Industry leading linear warranty of 25 years One of the highest output warranties in the industry in transferrable form. The new linear performance warranty is applicable for ALL Suntech products produced after 2013 or installed in 2013 but produced in 2012. warranty of 10 years Suntech s product warranty is covered by China Pacific Property Insurance Co., Ltd. Compliant to German law and Consumer Protection from North Rhine Westphalia. Manufacturer Power tolerances Based on Linear warranty 1st year warranty Testing costs Dismantling costs Transport costs Repair costs Mounting costs (0/+5%) 1 (0/+3%) nom. Power nameplate nom. power in Data Sheet yes 97% yes yes yes yes yes yes 97,5% no no yes yes no 2 (0/+5w) nom. Power nameplate yes 97% no no yes yes no 3 (0/+3%) nom. power in Data Sheet yes 97,5% no no yes yes no 4 (0/+5w) nom. Power nameplate no 98% no no yes yes no 5 (0/+5w) nom. Power nameplate yes 97% no no yes yes no

Wem 275W versus competitive 60 cell Mono products Suntech (Wem) Trina Yingli CSI Hanwha Solarone Power (W) Up to 275 Up to 270 Up to 280 Up to 260 Up to 265 Solar cell Mono Mono (Honey) Mono (panda) Mono Mono Module Eff. (%) 16.9 16.5 17.1 16.2 16.0 Power tolerance 0/+5% 0/+3% 0/+5W 0/+5W 0/+5W NOCT ( ) 45±2 46±2 46±2 45±2 45±3 Temp. Coeff. of Pmax (%/ ) -0.44-0.41-0.42-0.45-0.47 Dimensions (mm) 1640 992 35 1650 992 40 1650 990 40 1638 982 40 1652 1000 45 Weight (kg) 18.2 18.6 18.5 18.5 20.0 Junction box IP 67 IP65 IP65 IP65 IP67 Wind load/snow load (Pa) 3800/5400 2400/5400 2400/5400 2400/5400 2400/5400 Reduction of eff. from an irradiance of 1000W/m 2 to <4.5% < 4.5% <3.5% <3.5% <5% 200W/m 2 Current sorting Yes No No No No

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