Suntech Training Event Technical Forum Eric Koh September 19 th 2011

1H4 and MC4 2Current Sorting 3Near Coast Installation 4Competitor Analysis 5Step and Linear Warranty

01 Helios 4 Vs MC-4

4 1.Quality right down to connector 2.Helios 4 (H4) Connector from Amphenol and MC-4 From Multi Contact 3.Advantage of H4 connector: H4 Vs MC4 Connector

5 1.Using the right tools for H4 connector crimping: H4 Vs MC4 Connector Strip Tool Crimping Tool Wrench Tool Universal unlocking Tool

6 H4 Vs MC4 Connector

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9 1.TÜV testing for H4 and MC4 compatibility. 2.Use same connectors and correct H4 tool set. 3.Suntech will continue to monitor the regulations with the changes to AS Manually replacing a H4 connector with an MC4 connector will only void warranty with respect to connector issues H4 Vs MC4 Connector

02 Current Sorting

Current Sorting by Amperage Binning Modules connected in Strings –Serial Connection –Lowest module Current defines String Current –Module Current has Tolerances P mod = U mod x I mod I String = min (I mod 1.. I mod N ) U String = sum(U mod 1.. U mod N ) 11 V I = Mod 1 Mod 2 Mod 3 Mod 4 Mod 5 Mod 6 Mod 1 Mod 2 Mod 3 Mod 4 Mod 5 Mod 6 The module with the lowest current determines the overall output level

Amperage Binning

1.Explain this benefit to customers. 2.Each current class comes in the same pallet. 3.Use same current class for each string.

03 Near Coast Installations

16 Near Coast Installation Installation site < 50m from coast Not Allowed due to breaking waves Installation Site 50m < Site < 500m Follow draft near coast installation manual Installation Site 500m < Site Installation as per normal

17 Examples of near Coast Installations

18 1.Draft and official near coast installation manual. 2.Procedure: a.Take care not to scratch the aluminium frames. b.Where possible use aluminium clamps. Otherwise use an insulation gasket between the clamp and module. c.Apply anticorrosion spray to holes, corners, joins and earthing lug. 3.Maintenance schedule every 2-3 years: a.Clear salt. b.Check corrosion status c.Reapply coating if required. Near Coast Installation

04 Competitor Analysis

Understanding Product Advantages Power (Wp) & Efficiency: “Higher efficiency & greater power output can reduce BOS costs” –Suntech’s higher power modules reduce mounting, components, and labor costs. NOCT: “Better performance in the field” –Lower nominal operating cell temperatures lead to higher power output in varying temperatures –Irradiance of 800W/sqm, Ambient temperature of 20degC, Wind speed of 1m/s, Open back mounting. Temperature coefficient (Pmax): “More power at higher temperatures” –Lower temperature coefficients lead to maximum power output at high temperatures. PTC Ratio: “Higher power output in the field” –More power output in ‘real-world’ conditions, under PV USA test conditions. –solar irradiance 1,000 W/Sqm, 1.5 Air Mass, and 20 degrees C. ambient temperature at 10 meters above ground level and wind speed of 1 meter per second 20

Understanding Product Advantages (cont’d) Watts per kilogram: “More power per kilogram” –More watts per kilogram results in more power density – means more efficiently manufactured modules. Wind & Snow loads: “More reliable, safer installation” –3800 Pascal wind loads and 5400 Pascal snow loads lead to safer installation method. Junction Box: “Safer, higher performance junction box” –IP 67 rated junction box, with thermal isolation between backsheet, improves module performance and reliability. Connectors: “Safer, higher performance connectors” –High efficiency, IP 68 rated connectors. Power Tolerance: “Suntech delivers more power” –Compared to competitors who offer negative tolerance, Suntech offers 0 to +5%, delivering at a minimum, the power that customers expect. 21

Understanding Product Advantages (cont’d) Output Warranty: “Suntech warrants x% more power” –95% at 5 years, 90% at 12 years, 85% at 18 years, and 80% at 25 years. –Power Output Warranty based on nameplate (Pnom), as opposed to nameplate minus tolerance (Pmin). Transferable Warranty: “Suntech offers a transferable warranty” –Suntech’s warranty is transferable when product remains installed in original location 22

23 Competitor Analysis SuntechFirst SolarSanyoKyoceraHyundai mono Module typeSTP190S-24/Ad+FS Series 2HIP-210NKHE6KD195GH-2PUHiS-S×××SG Solar cellMonoCdTeMonoPolyMono Power range (W) Module efficiency14.9% 9.7%-11.1%16.7%14.3%13.2% Power tolerance0 / +5%±5%-5% / 10%±5%±3% Power per Weight ratio (W/kg) up to 12.3up to 6.7up to 14.0up to 11.9up to 11.2 NOCT 45±2‚ ℃ 45 ℃ 48 ℃ 45 ℃ 46±2 ℃

24 Competitor Analysis Temperature coefficient of Pmax -0.45% / ℃ -0.25%/ ℃ -0.30%/ ℃ -0.46%/ ℃ -0.44%/ ℃ Temperature coefficient of Voc -0.34% / ℃ -0.25% / ℃ -0.36% / ℃ -0.34%/K Temperature coefficient of Isc 0.05% / ℃ 0.04% / ℃ 0.03 / ℃ 0.06% / ℃ 0.052%/K Junction boxIP67NA IP65 Dimensions (mm)1580×808×351200x800x x798x351338x990x461476x983x35 SuntechFirst SolarSanyoKyoceraHyundai mono Module typeSTP190S-24/Ad+FS Series 2HIP-210NKHE6KD195GH-2PUHiS-S×××SG Weight (kg) Product warranty10 years5 years

25 Competitor Analysis Performance guarantee 5 years / 95%,10 years / 90%, 10 years / 90% 12 years / 90%,25 years / 80% 20 years / 80% 25 years / 80% 18 years / 85%, 25 years / 80% Warranty start-pointPnom Pmin Reduction of efficiency from an irradiance of 1000W/m 2 to 200W/m 2 <4% Experience an increase in efficiency of 2% at 200W/m 2 <2%NA SuntechFirst SolarSanyoKyoceraHyundai mono Module typeSTP190S-24/Ad+FS Series 2HIP-210NKHE6KD195GH-2PUHiS-S×××SG

05 Step Vs Linear Warranty

27 Step Vs Linear Warranty 1.Suntech is the innovator and leader in setting warranty standard. 2.One of the best warranties: a.Transferable warranty; b.Free module shipment related to claim; c.Third party arbitration of dispute; d.Independent test lab. 3.Little difference in performance guarantee. a.1.8% difference over a 25 years period for Canadian Solar warranty.

28 Step Vs Linear Warranty 1.Linear warranty is available as an option. 2.Warranty is covered under subsidiary of Fortune top 500 company, China Pacific Insurance Group. a.Smaller than the +-3% measurement tolerance for AAA solar simulator.

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