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en.longigroup.comDo not manually focus sunlight with mirrors or magnifying glass onto modules.LONGI modules shall be installed on proper buildings or other appropriate places (such as ground,garage, building outer wall, roof, PV tracking system) but shall not be installed on any vehicles.Do not install modules at places that are possible to be flooded.LONGI suggests that modules be installed in the working environment with the temperature of -20 to 50 which is the monthly average highest and lowest temperature of the installation sites. Theextreme working environment temperature for modules is -40 to 85 .Make sure that installed modules do not suffer wind or snow pressure that exceeds the permissiblemaximum load limit.Modules shall be installed in places free from shadows throughout the year. Make sure there are nolight-blocking obstacles in the installation sites.Carry out lightning protection for modules installed in places with frequent lightning and thunder.Do not install modules in places with possible inflammable gases.Modules cannot be used in environments with too much hails, snows, flue gas, air pollution and sootor in places with strong corrosive substances such as salt, salt mist, saline, active chemical steam,acid rain, or other substances corroding modules, affecting module safety or performance.Please take protective measures to ensure reliable and safe installation of modules in severeenvironments such as heavy snow, cold and strong wind or islands close to water and salt mist ordeserts.LONGI modules have passed the IEC61701 salt spray corrosion test, but the corrosion may stilloccur on where the modules frame is connected to the bracket or where the grounding is connected.LONGI modules can be installed 50m –500m away from the ocean side, but stainless steel oraluminum material are needed to be used in where contacting PV modules and apply anti-corrosionmeasurement on the connection point. Please refer to the LONGI Seaside Installation Manual forfurther detail.4.2 Selection of Tilt AnglesTilt angle of modules: Included angle between module surface and horizontal surface; the moduleNo. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comwill obtain the maximum power output in direct facing of sunlight.Sun LightModuleTilt AngleModules are preferred to be south-facing in the north hemisphere and north-facing in the southhemisphere.Please refer to standard modules installation guideline or suggestions from experienced PV moduleinstaller, for the specific installation angle.LONGI suggests that module installation tilt angle be no less than 10 so module surface dust canbe washed away easily by rainfall and times of cleaning can be reduced. And it is easy for pondingto flow away and avoid water print on the glass due to long time of water ponding which may furtheraffect module appearance and performance.The LONGI modules connected in series should be installed with the same orientation and tilt angle.Difference orientation and tilt angle may result in differ received solar irradiation and result in outputpower loss.If the LONGI modules are used in Stand-alone System, the tilt angle should be calculated based onseasons and irradiation to maximize the output power. If the modules output power meets theacquired load under the period of the worst irradiation in the year, the modules should be able tomeet the load of entire year. If the LONGI modules are used in Grid-connected System, the tilt angleshould be calculated based on the principle to maximize the yearly output power.5 Mechanical Installation5.1 Regular RequirementsMake sure that module installation mode and bracket system can meet the expected load, which isrequisite assurance that the bracket installer must provide. Installation bracket system shall betested and inspected by the third party testing institution with static mechanical analysis capacity inNo. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comaccordance with local national standards or international standards.Module bracket shall be made from durable, corrosion resistant, ultraviolet proof materials.Modules shall be fixed on the bracket solidly.Use higher brackets in places with heavy snow accumulation so the lowest point of modules will notbe covered by snow for a long time. In addition, make the lowest point of modules high enough soas to avoid shading of vegetation and woods or damage of sands and stones.If modules are installed on brackets parallel to the roof or wall, the minimum gap between themodule frame and the roof/wall shall be 10cm for air ventilation so as to prevent module wiredamage.Do not drill holes on glass or frame of the modules.Make sure the building is suitable for installation before installing modules on roof. Moreover, sealpermeable parts properly to prevent leakage.The module frames can appear thermal expansion and cold contraction so the frame intervalbetween two adjoining modules shall be 10mm.Make sure that back plate of modules will not in contact with bracket or building structures that canpierce into the inside of the modules, especially when the module surface is imposed by pressure.Maximum static load of the PV module by: front 5400pa and back 2400pa, these values can varydepending on installation method of the modules (please refer to the following installation guidance),the described load in this manual is for the test load. Note: on the basis of IEC61215 - 2016installation requirements, when computing the corresponding maximum design load, need toconsider the safety factor of 1.5 times.Modules can be installed horizontally or vertically. During the installation, the drain holes located onthe side of the module frame cannot be sheltered by such as the bracket.5.2 Installation MethodModule and bracket system connection can be realized by mounting holes, clamps or embeddedsystems. Installation shall follow the demonstration and suggestions below. If installation mode isdifferent, please consult LONGI and obtain approval. Otherwise, modules may be damaged andNo. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comquality warranty will become invalid.5.2.1 Install Modules by Mounting HolesMake use of bolts to fix modules on the bracket through mounting holes on the back frame. Seedetails in Figure 2.Installation ModeRecommended accessories as below essories materialWasher2*M8Q235B/SUS304selection shouldSpring WasherM8Q235B/SUS304base on localNutM8Q235B/SUS304environment.Torque range for fastening bolts: 16N m to 20N m5.2.2 Use clamps to install modulesUse the special clamp to install modules. See details in Figure 3.The clamp shall not contact glass or cause module frame deformed in any case. The contactingsurface of the clamp and frame front side shall be neat and smooth. Otherwise, frame and modulemay be damaged.Make sure that the clamp will not produce shading effect. Drain holes cannot be sheltered by theclamp. The clamp must overlap with module frame with no less than 8mm and no larger than10mm.No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comBoltClamp BLaminated PartBoltWasherWasherAluminum FrameClampAWasherWasherBracketSpring WasherNutSpringWasherDouble Glazing Module withFrameDouble Glazing Module with FrameClamp installation guideline5.2.3 Position of Installation Connecting PointsThe use of screw installation or pressure block installation; the maximum rear static load of themodules is 2400Pa (equivalent to wind pressure), the maximum front static pressure is 5400Pa(equivalent to wind pressure and snow pressure)ModulesMechanicalInstallationInstallation GuidelineProperty( )Method/InstallationLocationPressure block(1/4L-50) S 5400pa(1/4L 50)-2400paNote: Suitable forboth 60pc and 72pcmodulesNo. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comPressure block150-250mm 2400paNote: Suitable forboth 60pc modulesFrame bolt holeLocated according to60pcModuleactual frame(4 inside)Notes: In certaincases there can be 8holes on the frame. 5400paFrame bolt hole-2400paLocated according toactual frame(472pcmoduleoutside)Notes: In certaincases there can be 8holes on the frame.Frame bolt hole 2400paLocated according to60pcmoduleactual frame(4outside)No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.com72pcmoduleFrame bolt holeLocated according toactual frame(4 inside)Connection Point Location6 Electrical installation6.1 Electrical PerformanceModule electric performance parameters such as Isc, Voc and Pmax nominal values have 3% errorwith those under standard testing conditions of: irradiance of 1000 W/m 2, cell temperature of 25 and air mass of AM1.5.Under normal conditions, a PV module is likely to produce higher current and/or voltage thanreported at standard test conditions. The values of I sc and Voc marked on this module should bemultiplied by a safety factor of 1.25 when determining system components’ ratings such as ratedvoltage, cable capacity, fuse capacity, rated power and etc. . .When modules are in series connection, the final voltage is sum of that of the single module. Whenmodules are in parallel connection, the final current is sum of the single module as below Figure 5shows. Modules with different electric performance models cannot be connected in series.Series ConnectionParallel then series connectionDiodeOver current protectiondeviceElectrical DiagramTEL： 86-29-81566686No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneConnectorFAX： 86-29-81566685en.longigroup.com

en.longigroup.comThe number of modules in series connection in each strand shall be calculated according torelative regulations. The open circuit voltage value under the expected lowest temperatureshall not exceed the maximum system voltage value stipulated for modules and othervalues required by DC electric parts. (LONGI modules maximum system voltage isDC1000V/DC1500V---actually system voltage is designed based on the used modulesmodel and inverter.)CVoc 1-βVoc (25-T)T: The expected lowest temperature of the installation site.β:VOC temperature coefficient (% / ) (Refer to modules manual for further detail)If there is reverse current exceeding the maximum fuse current flowing through the module,use overcurrent protection device with the same specifications to protect the module; ifparallel connection strands are more than 2, there shall be an overcurrent protection deviceon each strand of module. See Figure 5.6.2 Cables and Connecting LinesIn module design, adopt enclosed junction boxes with the protective level of IP67 for on-siteconnection to provide environmental influence protection for wires and connections andcontacting protection for non-insulating electric parts. The junction box has well connectedcables and connectors with the protective level of IP67. These designs facilitate parallelconnection of modules. Each module has two independent wires connecting the junctionbox, one is negative pole and the other is positive pole. Two modules can be in seriesconnection by inserting the positive pole at one end of wire of one module into the negativepole of the adjoining module.According to local fire protection, building and electrical regulation, apply proper cable andconnector; ensure the electrical and mechanical property of the cables (the cables shouldbe coated in a catheter with anti-UV aging properties, and if is exposed to air, the cableitself should have anti-UV aging properties).The installer can only use one-way cable, 2.5-16mm2(5-14 AWG), 90 grade, withNo. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comproper insulation capability to withstand the maximum open circuit voltage (such asEN50618 approval). Need to select appropriate wire specifications to reduce voltage drop.LONGI requires that all wiring and electrical connections comply with the appropriateNational Electrical Code.When cables are fixed on the bracket, avoid mechanical damage to cables or modules. Donot press cables by force. Adopt light resistant cable ties and clamps to fix cables on thebracket. Though cables are light resistant and water proof, it is still necessary to preventcables from direct sun light and water immersion.The minimum bending radius cables should be 43mm.6.3 ConnectorPlease keep connectors clean and dry. Make sure connector nuts are fastened beforeconnection. Do not connect connectors that are damp, dirty or under any other improperconditions. Avoid connectors from direct sun light and water immersion or falling ontoground or roof.Wrong connection may lead to electric arc and electric shock. Please make sure that allelectric connection is reliable. Make sure all connectors with lock are fully locked.Only connectors matching those installed on module, i.e. from the same vendor and model,shall be used;(If you need to use different types of connectors, please consult the LONGIsolar );6.4 Bypass diodeLONGI solar module junction box contains bypass diode which is in parallel connection withthe cell strands. If heat spot occurs locally with the module, the diode will come intooperation to stop the main current from flowing through the heat spot cells in order torestrain module heating and performance loss. Notice, bypass diode is not the overcurrentprotection device.No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comIf the diode is found or doubted to be out of order, the installer or system maintenancesupplier shall contact LONGI. Please do not try to open the module junction box on yourown.6.5 PID Protection and Inverter CompatibilityLONGI modules have been tested with the most stringent PID test, modules cathodeusually are not necessary to be grounded, and therefore it can be compatible with theisolated (with transformers) or non-isolated inverters.PV modules may appear Potential Induced Degradation (PID) under high humidity, hightemperature and high voltage condition. Modules may appear Potential InducedDegradation (PID) under the conditions below:PV modules install under hot and humid weather condition.PV modules installation site is under long term humid condition such as floating PV system.To reduce the risk of PID, on the modules DC connection site, the cathode of must becorrectly grounded. The PID protection measures on system level are recommended asfollowFor isolated PV inverter, the cathode of the PV modules DC connection side can be directlygrounded.For non-isolated PV inverter, isolated transformer is needed to be installed before applyingvirtual grounding (grounding method guidance from the inverter manufactures are usuallyneeded)7 GroundingIn design of modules, the anodized corrosion resistant aluminum alloy frame is used forrigidity support. For safety utilization and to protect modules from lightning andstatic-electricity damage, the module frame shall be grounded.The grounding device shall be in full contact with inner side of the aluminum alloy andpenetrate the frame surface oxide film.Do not drill additional grounding holes on module frame.No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL： 86-29-81566686FAX： 86-29-81566685en.longigroup.com

en.longigroup.comThe grounding conductor or strap may be copper, copper alloy, or any other materialacceptable for use as an electrical conductor per respective National Electrical Codes. Thegrounding conductor must then make a connection to earth using a suitable earth groundelectrode.The module frame has been drilled and marked with clear sign for grounding purpose only.These holes can only be

Installation Manual for LONGI PV Solar Modules Regular Modules . Do not lift the module by holding the junction box or wires in any cases. Do not stand or walk on modules. Do not drop one module onto another. To avoi