Bifacial PERC Better LCOE Solution

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1 Bifacial PERC Better LCOE Solution Hongbin Fang Director of Product Marketing Denver, September 10, 2018

2 Mono PERC and Bifacial PERC Electrode ARC SiNx N + emitter PERC Rear passivation Rear AIBSF Electrode ARC SiNx P-type Si N + emitter Bifacial PERC Rear passivation Al fingers

3 Bifacial Technology Mono-facial to Bifacial power generation LONGi Solar Bifacial PERC Hi-MO2 cell and module bifaciality >75% Significant increase on energy yield Double glass lamination, 30 year power degradation warranty

4 Product Feature Conventional PERC cell structure Bifacial PERC cell structure Performance and cost Front side efficiency equivalent to conventional PERC Manufacturing cost comparable to conventional PERC Bifacial light harvesting, 8%-25% power gain from rear side Application Utility Commercial rooftop and carport

5 Module Power Degradation Warranty WARRANTY 10Y MATERIAL& CRAFTWORK 10Y POWER-OUTPUT >93.95% 30Y POWER-OUTPUT >84.95%

6 Optimize System Design to Improve Bifacial Energy Yield

7 Backside Energy Yield Mono facial module Bifacial module Direct sunlight Direct sunlight + Reflection + Scattered light

8 System Design with Bifacial Module

9 Backside Energy Yield: Albedo Bifacial gain improves with increasing ground Albedo

10 Backside Energy Yield: Albedo and Height Bifacial module backside energy yield improves with increasing Albedo (background reflectivity). Selecting site with more reflective background can improve overall system energy yield Increasing module height improves backside energy yield, as well as backside irradiance uniformity Module height (clearance from ground) of 1m and above is recommended Irradiance at backside - Clearance 8 cm Irradiance at backside - Clearance 108 cm

11 Daily energy yield (kwh/kw) Bifacial PERC Module Field Monitoring Data 5 Daily energy yield (kwh/kw) Energy yield gain 20.10% 23.70% 25% 20% % 15% 3 10% 5% 2 Multi Bifacial/TPO/1m Bifacial/TPO/1.5m Bifacial/TPO/2m 0% Data from Taizhou test site (N32.5 / E119.9 ) Bifacial PERC Capacity 2.8kw, multi capacity 2.7kw, project located in Taizhou test site (N32.5 / E119.9 ), China Fixed tilt configuration With same background condition, increasing backside energy yield with increasing racking height

12 Energy yield(kwh/wp) Bifacial PERC Module Field Monitoring Data 14 Bifacial PERC Std Mono Gain (%) 14% 12 12% 10 10% % 8% 6% 4 4% 2 2% 0 0% Bifacial PERC Capacity 18.9kw, std. mono capacity 18.25kw, project located in Pucheng, Shaanxi (N34.97 /E ), China Fixed tilt configuration (15 degree), distance to ground 1.6m Three month monitoring data showed 11.27% energy yield from backside

13 Bifacial PERC Module Field Monitoring Data Kubuqi Bifacial Field Data +15.9% Bifacial PERC project (336kw on single axis tracker) in Kubuchi, Inner Mongolia (N45.36 /E ), China 1Yr energy yield by Bifacial module + tracker is 26.7% higher than Multi module/fixed tilt and 15.9% higher than Multi/tracker

14 Annual energy yield (kwh/kw) Higher Energy Yield with PERC and Bifacial PERC % imprv t % imprv t % imprv t Multi Mono PERC Tracker+Mono PERC Tracker+Bifacial PERC

15 PERC Efficiency Improvement Potential Cell Efficiency Cell Efficiency Module Power 23.60% Dec % Dec W (Half-cut) Apr % 22.41% 82.15% ( Bifaciality ) 333.7W / 20.41% Jan PERC Cell Bifacial PERC Cell PERC Module

16 Bifacial PERC Technology Roadmap Bifacial PERC_Full cell Bifacial PERC_Half cell Bifacial PERC_Shingling

17 Technology Strength Through Consistent R&D Investment $379 M 6.80% 6.90% 6.77% 8% 7% accumulated 4.90% 5% 4.90% 6% R&D spending 176 5% 4% 5-7%(of revenue) 260 patents awarded 86.6 R&D investment per year % 2% 1% 0% 460 staff member R&D ($M) % of revenue

18 LONGi Solar: Dedicated in Mono 18 years Ningxia 1000T mono ingot fab completed; LONGi enters PV materials business Delivered 1GW mono wafer; Became the largest mono wafer supplier globally Ingot / Wafer 28GW Module 12GW Feb Apr Nov Sept Oct LONGi founded IPO on Shanghai Stock Exchange LERRI acquired; expanding into solar cell/module business Ingot / Wafer 45GW

19 Diamond Wire Slicing Technology $3B Annual savings using DWS technology

20 Wafer Cost Reduction $0.16/pcs Non-Si mono wafer cost by 2020

21 Largest Mono Wafer and Module Manufacturer Global market share by LONGi 35% 16% Mono Wafer Mono Module

22 Strong Financial Performance Total assets (Million USD) 3,047 5,226 Market Cap ~US$7B as of 6/30/2018 Net Profit (Million USD) Gross Profit (Million USD) , Revenue (Million USD) +72% % Debt Ratio 1,833 2, % 57% 50.0% 44.6% 47.4% 56.7%

23 Financial Health Financial Health No. 1 among all PV Manufacturers ST Quartile 2 nd Quartile 3 rd Quartile 4 th Quartile 1.1 Strong financial performance recognized by industry: Financial health No.1 Profitability and cost leadership top 3 Overall score top Major PV module manufacturers PHOTON Consulting, LLC PV Triathlon Report in Nov, 2017

24 Green Manufacturing

25 Thank You for Your Attention