en.longigroup.comInstallation Manual for LONGI PV SolarModulesRegular ModulesSafety Notes This manual elaborates on installation and safety use information for PV powergenerating modules (hereinafter referred to as module) of LONGI Solar TechnologyCo., Ltd. (hereinafter referred to as LONGI). Please abide by all safety precautions inthis guide and local regulations. Installation of modules requires professional skills and knowledge and is to becarried out by qualified personnel. Please read this manual carefully beforeinstalling and using this module. Installation personnel shall get familiar withmechanical and electrical requirements of this system. Please keep this manualproperly as reference for future maintenance or upkeep or for sales and treatmentof modules. If you have any doubts, please contact LONGI global quality and customer servicedepartment for further interpretation.This installation manual is suitable for the following -72PE-***MNo. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.comContents1 Introduction. 42 Laws and Regulation . 43 General Information . 43.1Modules identification . 43.2 Regular Safety . 53.3 Electrical Performance Safety . 63.4 Operation Safety . 73.5 Fire Safety . 84 Installation Conditions. 84.1 Installation Site and Working Environment . 84.2 Selection of Tilt Angles . 95 Mechanical Installation . 105.1 Regular Requirements . 105.2 Installation Method .115.2.1 Install Modules by Mounting Holes . 125.2.2 Use clamps to install modules . 125.2.3 Position of Installation Connecting Points . 136 Electrical installation . 156.1 Electrical Performance . 156.2 Cables and Connecting Lines . 166.3 Connector . 176.4 Bypass diode. 176.5 PID Protection and Inverter Compatibility. 187 Grounding . 18No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.com8 Operation and maintenance . 208.1 Cleaning . 218.2 Module Appearance Inspection . 218.3 Inspection of connectors and cables . 22No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.com1 IntroductionFirst thank you very much for choosing LONGI PV modules!This installation manual covers key electric and mechanical installation information, so pleaseunderstand such information before installing LONGI modules. In addition, this manual also coverssome safety information that you shall get familiar with. All contents in this manual are intellectualproperties of LONGI which originates from long term of technical exploration and experienceaccumulation of LONGI.This installation manual does not entail any explicit or implicit quality warranty and does notstipulate on compensation schemes for losses, module damages or other costs caused by orrelated to module installation, operation, utilization and maintenance process. If patent rights or thethird party rights are infringed by use of modules, LONGI will not take any responsibility. LONGIreserves the rights for modifying product manual or installation manual without notice in advance.If customers fail to install modules as per requirements set forth in this manual, the quality warrantyprovided for customers during sales will become invalid. In addition, suggestions in this manual areto improve safety of module installation, which are tested and proved by practices. Please providethis manual to PV system users for reference to and advise them of safety, operation andmaintenance requirements and suggestions.2 Laws and RegulationMechanical and electrical installation of PV modules shall follow proper regulations such as electriclaw, building law and electric connecting requirements. These regulations vary with differentinstallation sites, such as building roofing installation, vehicle-mounted application and etc.Requirements may also vary with DC or AC system, difference installation system voltage. Pleasecontact local authorities for specific clauses.3 General Information3.1Modules identificationEach module is pasted with 3 labels providing information below:No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.comNameplate: It describes product type, standard rated power, rated current, rated voltage, opencircuit voltage, short circuit current under testing conditions, certification indicator, maximum systemvoltage, etc.Current level label: It describes modules according to their optimal working current.Serial No.: Each module has a unique serial number which is solidified inside the modulepermanently and it can be seen from front top of the module. Each serial number is put in beforelaminating of the module. In addition, you can find the same serial number on the modulenameplate.1Frame2Glazing3EVA4Solar Cell5Black Plate6Silica Gel7Junction Box8Name Plate9Cable10Connector11Mounting Hole12Grounding Hole13Drain Hole14Bar CodeFigure 1 Double Glazing modules Mechanical drawing3.2 Regular SafetyThe application level of LONGI Solar module is Class Ⅱ, which can be used in systems operatingat 50 V DC or 240 W, where general contact access is anticipated;No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.comWhen the module is installed on roof, it is necessary to take the overall fire rating of the finishedstructure as well as later overall maintenance into account. The roofing PV system shall be installedafter assessment by construction experts or engineers and with official analysis results for the entirestructure. It shall be proved capable of supporting extra system bracket pressure, including PVmodule weight.For your safety, please do not work on the roof without safety protective measures which includebut not limited to fall protection, ladder or stair and personal protective articles.For your safety, please do not install or handle modules in unfavorable conditions including but notlimited to strong wind or gust, damp or sandy roofs.3.3 Electrical Performance SafetyPV modules can produce DC current under illumination, any contact of the exposed metal of themodules connection wires may result in electrical shock or burn. Any contact of 30V or larger DCVoltage can be fatal.In case of no connected load or external circuits, modules can still produce voltage. Please useinsulation tools and wear rubber gloves when operating modules in the sunlight.PV modules does not have switch. PV modules can only stop operating when they are kept fromsunlight or covered by cloth, hard board or light-proof materials or when front side of modules areplaced on smooth and flat surfaces.To avoid electric arc or electric shock hazards, please do not break down electric connection inloaded conditions. Wrong connections will also lead to electric arc or shock. Keep connectors dryand clean and make sure that they are in good operating condition. Do not insert other metals intothe connectors or carry out electric connection by whatever means.Snow and water in surrounding environments will intensify light reflection and lead to increase ofoutput current and power. And module voltage and power will increase under low temperaturecondition.No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.comIf module glass or packaging materials are damaged, please wear personal protective articles andthen isolate modules from the circuit.Any modules related works are only allowed in dry conditions by means of dry tools. Do not operatewhen modules are wet unless you wear the proper electric shock protection articles. Please followthe cleaning requirements in this manual when cleaning modules.3.4 Operation SafetyDo not open LONGI Package in transportation and storage process unless the modules arrive atthe installation site.Do not damage the package and do not fall packaged modules.Do not exceed the highest layer limit indicated on the packaging carton when piling modules up.Put packaging carton in the ventilated, rain-proof and dry places before unpacking of modules.Open LONGI’s packaging carton following unpacking instructions.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 avoid glass damage, do not put heavy objects on module glass.Be careful when placing modules on a surface and at corners in particular.No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

en.longigroup.comDo not try to unpack the module or remove nameplate or parts of modules.Do not paint surface of modules or apply any other glues.Do not damage, grad or scratch back film of modules.Do not drill frame of modules, which may reduce frame loading capacity or lead to frame corrosion.Do not scratch anodic coating of aluminum alloy frame except for grounding connection. Scratchmay lead to frame corrosion and reduce frame loading capacity.Do not repair glass or modules whose back film is damaged on your own.3.5 Fire SafetyPlease consult local laws and regulations before installing modules and abide byrequirements on building fire protection. Fire rating of LONGI modules is Class A accordingto IEC 61730-2.The roof should be coated by a layer of fireproof materials with suitable fire protection rating forroofing installation and make sure that the back plate and the mounting surface are fully ventilated.Difference roofing structures and installation modes will affect fireproof performance of buildings.Improper installation may leads to the risk of fire.To guarantee roof fire rating, the distance between module frame and roof surface must be 10cm.Adopt proper module accessories such as fuse, circuit breaker and grounding connector accordingto local regulations.Please do not use modules if there are exposed inflammable gases nearby.4 Installation Conditions4.1 Installation Site and Working EnvironmentThe modules can only be used on earth but not in outer space.No. 8989, Shangji Road, Xi'an Economic and Technological Development ZoneTEL: 86-29-81566686FAX:

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:

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:

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:

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:

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:

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:

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:

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:

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:

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:

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