INSTALLATION MANUAL
Contents
1. aA Positive od d 1 Negative Fuse L P Fig 10 Parallel connections NT Series AX 11 Ver EU E NexPe wer PV modules can be wired in parallel to increase current Connect cables from the positive negative terminal of one module to the positive negative terminal of the next module Fig 10 a When several PV module strings are connected in parallel the voltage and current are as below Viota V4 V27 V kota 11 lo a n number of series strings s Please be noted that the short circuit current of system is calculated by multiplying the Isc listed on the module label by the number of source circuits operating in parallel Use this value and multiply by 1 56 to determine the conductor capacities and fuse sizes connected to the module output o Ensure the system design prevents a reverse current of no more than 4A will flowing through the PV module Otherwise it will void the warranty Parallel configuration is not limited in case of taking proper measure e g fuse for protection of module and cable from overcurrent and or blocking diode for prevention of unbalanced strings voltage to block the reverse current flow 6 3 Inverter Selection To stay within the warranty conditions of the NexPower NT Series AX PV modules it is essential to select inverters with the following features Otherwise the warranty is not provided i Transformer type inverters a2. i Transformer type inverters are required li If transformerless inverters are selected it is essential to add an external transformer iii Specifically designed transformer less inverters e g Sunways AT series Please refer to Chapter 4 Chapter 7 for more detailed information m m m m NT Series AX 4 Ver EU E 4 SITE SELECTION AND TILT ANGLE a The PV module generates power when it is illuminated by sunlight In order to gain maximum power the PV module should face directly towards the sun The PV module should be installed to typically face south in the northern hemisphere and north in the southern hemisphere a In most applications the PV module should be installed in a location without shading throughout the year It is necessary to choose a site where no trees buildings or obstructions could cast shadows on the PV module o f it is not possible to place the PV module in shadow free location the PV module must be sited where no shading occurs between the hours of 10 AM and 2 PM Otherwise it will void the warranty In systems that are configured with multiple rows of angled PV modules the rows should be spaced far enough apart to minimize the impact of rows shading other rows during the course of the day This distance is dependent on the latitude at which the system is installed It is not permitted to modify the module under any circumstances Make sure the location and it
3. NG NT SERIES AX PV MODULE Please read these limitations carefully before installing or using the modules To stay within the warranty conditions of the NexPower NT Series AX PV modules it is essential to install the PV module with the following guidelines Do NOT install PV module upside down junction box Otherwise it will void the warranty The position of junction box should not overlap the mounting structure a Junction box cables and or connectors should not be stressed in any circumstances s The PV module is designed for vertical mount Vertical mount is strongly recommended s The PV module can either be installed vertical or horizontal but must conform the following conditions Otherwise it will void the warranty i If the PV module is mounted vertically the PV module should be installed in a manner which prevents shading effects also partial shading The PV module must be sited where no shading occurs between the hours of 10 AM and 2 PM ii If the PV module is mounted horizontally the PV module should be installed in a manner which is free from shading snow and other objects the whole year through iii For on ground installation make sure to leave sufficient distance between the PV module and the ground to avoid the module being covered by accumulated water snow grass or other objects a Vertical mount b Horizontal mount NT Series AX 3 Ver EU E a Mounting structure A b Mounting str
4. NexPower PLEASE READ THIS MANUAL CAREFULLY BEFORE INSTALLING OR USING THE MODULES INSTALLATION MANUAL Thin Film Photovoltaic Module NT Series AX N ex P ewer NexPower Technology Corp NT Series AX 0 Ver EU E Table of Contents T INTISODUGTION 2 2 SAFETY PRODUCT WARRANTY 2 2 1 Safety 2 2 2 Product Warranty Reminders esses enne 2 3 LIMITATIONS ON USING NT SERIES AX PV MODULE 3 4 SITE SELECTION AND TILT 5 INSTALLATION Exi UE EUM aa KIC SO EA RUE SIE NEUE 5 5 1 Limitation of Installation 5 5 2 Mounting 6 5 2 1 Clamps amp FIXNG PIales ui iine rata 6 922 Sliding cT 9 5 2 3 Mounting 9 6 WIRING 1 11 6 1 Series eee 11 6 2 Parallel WIrING ccccccecc eee eececeeceeceeceeeeeeeeeeeeeeseeseeaeeseseeseeaeegeseeeeeaeees 11 6 3 Inverter Selection sese 12 6 4 Cable Selection 28 4 7 ce he 7er 12 6 5 Bypass Diodes ste N
5. When this situation occurs it is a good manner to use only lots of water to flush the dirt away Moreover cleaning the module surface is proper but only with a soft cloth and mild detergent water Before washing please wear electrical insulation gloves to avoid electrical accidents Protect yourself against any possibility from accidents during maintenance If cleaning the back of the module is required take utmost care to avoid penetrating the back side materials During the cleaning process do NOT cause any partial shading parallel to the longitudinal direction of the module For more information please refer to Chapter 5 Cleaning procedure shall be carried out when the ambient temperature is between 5 C 41 F and 25 C 77 F Cleaning in an hour after the first light an hour before the last light is highly recommended Check annually and carefully to ensure for fixed mounting hardware and tightened wiring Any loose connections or parts may cause damages in modules or arrays f any problem is found please contact your local PV system dealer for professional service o m m 8 DISCLAIMER OF LIABILITY NEXPOWER does not assume responsibility and expressly disclaims liability for loss damage or expense arising out of or in any way connected with such installation operation use or maintenance of the PV module No responsibility is assumed by NEXPOWER for any infringement of patents or other rights of third parties
6. al mount Vertical mount is strongly recommended s The PV module can either be installed vertical or horizontal Fig 1 but must conform the following conditions Otherwise it will void the warranty i conditions partial shading parallel to the longitudinal direction is not permissible Even in case of on end assembly all shading parallel to the longitudinal direction must be avoided at all times especially during completion of installation when the modules are hooked on grid such shading is also created by erecting scaffolds masts sticks etc li lf the PV module is mounted vertically the PV module should be installed in a manner which NT Series AX 5 Ver EU E prevents shadowing effects The PV module must be sited where no shading occurs between the hours of 10 AM and 2 PM iii If the PV module is mounted horizontally the PV module should be installed in a manner which is free from shading snow and other objects the whole year through iv For on ground installation make sure to leave sufficient distance between PV module and the ground to avoid the module being covered by accumulated water snow grass or other objects a Vertical mount b Horizontal mount Fig 1 PV Module mounting configuration 2 Please refer to Chapter 2 WARNING AND SAFETY for more detailed limitation items 5 2 Mounting Method PV modules can be mounted on ground roof and or pole by using bolts clamps fixing plates or sliding fra
7. ath Extra attention is required to avoid Electric Shocks during usage When connecting cables push the plus and minus connectors against each other while twisting them until they are fully engaged Always wear electrical insulating gloves protective head gear suitable eye protection and safety shoes while working on systems Use only insulated tools during installation Do NOT work under rain snow or windy conditions Do NOT touch the junction box or the output cables connectors with bare hands during installation regardless whether the PV module is connected to or disconnected from the system Do NOT store or move the modules with the cables connected Protect plug contacts against soiling and do NOT use soiled plug contacts to make any plug connections 2 2 Product Warranty Reminders Products have been inspected before shipment Please confirm module condition before installation Please obey the following reminders or the warranty is NOT provided gt It must be made by two people moving when manual handling process If caused by lack of fault crack break it will be deemed negligent construction work Do NOT use PV modules near equipments or locations where flammable gases can be generated Do NOT disassemble the PV module or remove any component or label from the module Do NOT stand or step on the PV module cables connectors or end caps Do NOT drop the PV module or allow objects to fall on PV module Do NOT a
8. each is terminated with a Multi Contact compatible connector The positive terminal has a female connector and the negative terminal has a male connector a Do NOT cut the cable attached to PV module in order to connect to another type of connector or cable a Connecting PV modules in series would increase voltage while connecting in parallel would increase current In order to design an adequate PV system PV modules should be connected in series and or in parallel depending on specifications of inverters or other pertinent equipments s While connecting several strings in parallel it is necessary to keep equivalent quantity of PV modules to each parallel string If connected incorrectly PV modules will become damaged All system wiring must conform to local electrical codes 6 1 Series Wiring Positive Negative C Fig 9 Series connections PV modules be wired in series to increase voltage Connect cables from the positive negative terminal of one module to the negative positive terminal of the next module Fig 9 a When several PV modules are connected in series the voltage and current as below V4 Vo V l4 l2 n n number of series PV modules tis recommended to multiply the Voc listed on the module label by a factor of 1 25 and make sure the system voltage must not exceed a maximum of 1000V Otherwise it will void the warranty 6 2 Parallel Wiring
9. ic een nee 12 6 6 Grounding een 12 LMAINTENANGE n een 14 8 DISCLAIMER OF LIABILRAY 14 9 APPENDIX 1 Mechanical Specifications 15 10 APPENDIX 2 Electrical Specifications 16 Eee in TE TEN 16 NexPower Technology CORP N ex Pr wer No 2 Houke S Rd Houli Township Taichung County 421 Taiwan R O C TEL 886 4 25808888 886 4 25808889 www nexpw com NT Series AX 1 Ver EU E NexPo wer 1 INTRODUCTION The installation manual describes the installation and maintenance instructions for NT Series AX PV module This document also contains warning and safety information users should understand thoroughly Please read this manual carefully before the installation The installation of the PV module should only be performed by qualified specialists only Before attempting to install wire operate or maintain the PV module please carefully read and completely understand the information described in this installation manual This document does not constitute express or imply a warranty in any form 2 SAFETY PRODUCT WARRANTY NOTICE 2 1 Safety Notice PV module converts sunlight to electricity when sunlight or light other source illuminates the module surface PV modules can produce high voltage and current which may cause serious injury or even de
10. les found on the frame The PV module has four 03 5mm holes in the frame for grounding purpose Select at least one grounding hole according to PV module mounting mode Must apply equipment grounding at the same electrical potential level to all PV modules s Grounding cables must be bolted or screwed with star washers Fig 11 Nut Star washer Bolt Grounding Fig 11 Grounding connection of the PV module a When connecting in series PV modules either connect to the structure members by attaching wires to the ground holes on the frames or directly bind with the structure member at adequate positions to deploy the grounding method at the designated equipment grounding spot Grounding must be done on the first or the last PV module of each string Fig 12 Otherwise it will void the warranty i Structure member Structure member Grounding Grounding method B Fig 12 Ground method of the PV array NT Series AX 13 Ver EU E The negative pole of solar generator strings connected to the inverter must also be grounded Fig 13 Otherwise it will void the warranty Inverter Protection Device Grounding Fig 13 Negative pole grounding method 7 MAINTENANCE s The PV modules are designed to last for extended period of time thus require very little maintenance 0 When dirt accumulates on the surface of PV module and becomes excessively built up power output may decline
11. les is compatible For more detailed or specific recommendations please contact your PV system dealer or module provider Fig 4 Clamp dimension definition s The PV modules may be mounted by using clamps or fixing plates on long edge of PV module which would be perpendicular Fig 5 a or parallel to array racks Fig 5 b To keep the warranty validated on NexPower NT Series AX PV modules it is essential to install the PV module according to the following guidelines NT Series AX 7 Ver EU E NexP wer i The clamp position C is from the end of the module to the centerline of the clamp or fixing plate ii The clamp position C should be symmetrical at each side of PV module ii PV module be mounted as desired in accordance with the instruction approved in the attachment guidelines Table 1 SnowlWind load 2400 Pa Wind load 3800 Pa Snow load 5400 Pa C 20 to 450mm C 120 to 180mm C 70 to 110mm on 2 g c 0 23 2 E 9 gt O lt Clamping system Attach to the long frame Use four clamps Use four clamps Use four clamps C 40 to 285mm Clamping system Attach to the short frame Use four clamps o D For insertion system please consult with NexPower for further information E o The mounting configurati
12. mes For proper operation and to avoid damage from condensation the PV module requires an adequate flow of air across the rear surface While installing PV modules ensure sufficient distance between the rear of PV module and the mounting surface to allow the air flow In case of on ground installation be sure to leave sufficient distance between PV module and the ground to avoid the module being exposed to standing water or snow 2 The array racks must support the bottom of the modules and must be continuous pieces no breaks in the rack s The frames of module should not be stressed by bending or twisting force during installation and operation a When selecting the material for the assembly system pay attention to the electrochemical series avoidance of contact corrosion between different materials 5 2 1 Clamps amp Fixng Plates PV module be mounted by using clamps and fixing plates Fig 2 3 NT Series AX 6 Ver EU E NexP wer PV module N PV module Support structure Fig 2 Mounting method clamp Fixing plate Fixing plate PV module PV module i c structure Fig 3 Mounting method fixing plate a The torque on the clamp bolt or fixing plate bolt should be 8 10 Nm Otherwise it will void the warranty s The mounting clamp and fixing plate must meet the dimensions requirements Fig 4 i LengthA 17mm z Az 7mm li Length B B 2 40mm The common clamp used for crystalline PV modu
13. on is certified by the third party organization A1402 MI B Table 1 Attachment guidelines NT Series AX 8 Ver EU E 5 b Mounting structure B Fig 5 Mounting structure a In most installations a clearance of 5 mm at least between modules is necessary to accommodate thermal expansion 5 2 2 Insertion system The PV module must be supported along the length of the short edge it can be mounted by using support frame as following steps Fig 6 i Place the module into the upper fixing frame component ii Slide the module upwards as far as possible and place it into the lower fixing frame component s The PV module has four 10 mm holes on the long edge of its frame Fig 7 for mounting purpose Please refer to Appendix 1 s PV modules be fastened to a support by using bolt holes that are at the bottom of the frame with stainless M8 bolts washers spring washers and nuts Fig 8 Do NOT damage the rear surface of PV modules while fastening PV modules by bolts a In most installations a clearance of 5 mm at least between modules is necessary to accommodate thermal expansion NT Series AX 9 Ver EU E NexP wer Fig 6 Mounting method Insertion system Mounting hole x 4 Bolt Washer Frame Structure member Washer Spring Washer Nut Fig 8 Mounting method bolt NT Series AX 10 Ver EU E 6 WIRING s The PV module has two sunlight resistant output cables and
14. re required ii If transformerless inverters are selected it is essential to add an external transformer ii Specifically designed transformer less inverters e g Sunways AT series a For more detailed or specific recommendations please contact your PV system dealer or module provider 6 4 Cable Selection t is very important to use the proper cable with a minimum wire gauge approved for usage at the maximum short circuit current Smaller gauge cables and connectors can become overheated under high currents The cables selected should have a temperature rating higher than 90 C Series and parallel wiring should use the same connectors as of the PV modules 6 5 Bypass Diodes Buildings trees or obstructions around PV modules can cast shadows on PV modules Current forced through shaded part of PV modules causes additional heating and severe loss of power o In order to avoid this condition which may impair PV module NT Series AX module is equipped with factory installed bypass diodes Rated value Repetitive Peak Reverse Voltage 1000 V Maximum Average Forward Current 6 6 Grounding Grounding method must comply with laws or electrical regulations Please confirm electrical codes in the region where the PV system is installed If the grounding should be completed in local codes please conform to the following steps NT Series AX 12 Ver EU E Each PV module must be grounded using the grounding ho
15. rtificially concentrate sunlight onto the PV module Do NOT connect the NT Series AX PV module with any other type of PV module Do NOT cut the cable attached on PV module then connect to another type of cable or connector Do NOT drill holes in the frame or on the glass of PV module Do NOT use chemicals in cleaning the surface or back sheet of PV module Do NOT let water remain on the glass surface of PV modules for an extended period of time Please note the back surface of PV module is not protected by glass and is vulnerable to sharp objects Do NOT cover the water drain holes of the frame A A A A A A A A A A A NT Series AX 2 Ver EU E Do NOT hang or carry PV module by the cable Do NOT pull the cable resulting in loose or damaged the junction box during handing and installing process Mount the PV module onto the structure member with specified mounting structure Make sure to fasten bolts completely and lock in order not to loosen Do NOT damage the back sheet of PV modules while fastening the PV modules to a support rack Do NOT cause any course of partial shading that appears parallel to the longitudinal direction on the module Appropriate measures should be taken to prevent possible damage to lower edge of the PV module in snow condition and also take proper steps to maintain reliability and safety in case the PV modules are installed in area such as cold areas strong wind areas 3 LIMITATIONS ON USI
16. s surroundings are free from such conditions i Locations where corrosion may occur due to exposure to sea water salt breeze etc ii Locations where the PV module may be exposed to corrosive matters Ex chemical factory domestic animals hut hot spring or volcano area emitting hydrogen sulfide or ammonia gas In some installations the PV module is mounted at a tilt angle which is measured between the PV module and the horizontal ground For grid connected installations where PV modules are attached to a permanent structure it is recommended to tilt PV module at the angle equal to the site s latitude Adjust the PV module orientation to face the sun directly so it will generate the maximum power a t is recommended to set the tilt angle above 10 15 degrees so that rain can flush away the accumulated dust on PV module surface If lower a periodic cleaning maintenance may be necessary 5 INSTALLATION 5 1 Limitation of Installation The support structure for the PV module must be engineered to withstand the anticipated wind and snow loads Additionally other forces may need to be considered according to local standards and regulations a Do NOT install PV module upside down junction box downward Otherwise it will void the warranty The position of junction box should not overlap the mounting structure a Junction box cables and or connectors should not be stressed in any circumstances s The PV module is designed for vertic
17. s and any other intellectual property rights related to these contents are owned by NEXPOWER Technology Corporation Except to the extent expressly permitted by applicable law no contents in this manual may be used copied modified translated distributed or otherwise utilized without the prior written consent of NEXPOWER Technology Corporation NexPower Technology CORP wer No 2 Houke S Rd Houli Township Taichung County 421 Taiwan R O C TEL 886 4 25808888 886 4 25808889 www nexpw com NexP NT Series AX 16 Ver EU E f dh ANT gar
18. ucture B To keep the warranty validated on NexPower NT Series AX PV modules it is essential to install the PV module according to the following guidelines i The clamp position C is from the end of the module to the centerline of the clamp or fixing plate ii The clamp position C should be symmetrical at each side of PV module PV module can be mounted at various loading condition as desired in accordance with the instruction approved in Chapter 5 2 1 a The mounting clamp and fixing plate must meet the dimensions requirements i LengthA 17mm z A 2 7mm li Length B B gt 40mm The clamp commonly used for crystalline PV modules is compatible a The torque on the clamp bolt or fixing plate bolt should be 8 10 N m Otherwise it will void the warranty It is not permitted to modify the module under any circumstances Make sure the location and its surroundings are free from such locations where corrosion may occur due to exposure to sea water salt breeze corrosive matters Ex chemical factory hot spring or volcano area emitting hydrogen sulfide or ammonia gas Ensure the system design prevents a reverse current of no more than 4A will flowing through the PV module Otherwise it will void the warranty Grounding means with the PV module frames should comply with laws or electrical regulations of your regions or countries It is essential to select inverters with the following features Otherwise the warranty is not provided
19. which may result from use of the module NEXPOWER reserves the right to make changes to the product specifications or installation manual without prior notice NT Series AX 14 Ver EU E NexPe wer 9 APPENDIX 1 Mechanical Specifications Specification o 142 Items Length mm Width mm 1422 Thickness mm 2422 Weight kg 1 198 J 9 4x Mounting hole 10mm 4x Ground hole 23 5mn 4x Drain hole 6x12mm 4x Drain hole 6 5x15mm Front View Back View A A Section B B Section Cross section View NT Series AX 15 Ver EU E NexP wer 10 APPENDIX 2 Electrical Specifications Grado condition stable iiia Stable nial Nominal Power 5 W 150 1725 145 461 Open Circuit Voltage MI er 955 er Short Circuit Current a 254 266 29i wa 68 6 Maximum Power Voltage V 64 7 Maximum Power Current A 232 25 _ Maximum System Voltage 100 Maximum Fuse Rating A A n Data above represent stabilized values at Standard Test Conditions STC Irradiance 1000 W m Spectrum AM1 5 Cell temperature 25 C electrical ratings have a tolerance of 10 unless specified otherwise Specifications are subjected to change without notice 11 COPYRIGHT All contents in this manual including without limitation all text logos images photos graphics design
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