Goodwe GALAXY Series User manual

INSTALL ATION
MANUAL
GOODWE PVBM
UP TO A SUSTAINABLE FUTURE
GOODWE TECHNOLOGIES CO., LTD. [email protected]m
GALAXY SERIES
BMT-G3/088A
GoodWe PV Building Material Installation Manual – 20221201 Information presented is subjected to change. GoodWe reserve the final right for explanation on any of the information presented hereby.

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CONTENT
1
2
5
8
4
7
3
6
DESCRIPTION OF THE
MAIN STRUCTURE OF
GALAXY LIGHTWEIGHT
PRODUCT
INSTALLATION
MATERIALS LIST
ELECTRICAL
INSTALLATION
APPENDIX
INSTALLATION
WORK OF GALAXY
LIGHTWEIGHT
PRODUCT
CAUTIONS
PRE-INSTALLATION
INSPECTION WORK OF
GALAXY LIGHTWEIGHT
PRODUCT
ELECTRICAL
CONSTRUCTION
PROCESS
P3 P4
P13
P22
P6
P20
P5
P18

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1
DESCRIPTION OF THE MAIN STRUCTURE OF
GALAXY LIGHTWEIGHT PRODUCT
Galaxy Lightweight Product Front Installation
Altitude <2000m
Fire Protection Level:CLASS C
(IEC61730-2-MST23)
Protection Level:Level II
Maximum static load: front 5400Pa; back 2400Pa
TPO waterproof membrane
Junction box
M10 mono PERC half cell

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2.1 CONSTRUCTION TOOLS LIST
2.2 ELECTRICAL TOOLS LIST
PS：This list only indicates the main tools required for the installation of Galaxy Lightweight
Product structural system, excluding the tools used for the installation of the roof suppo
section and the electrical section. For the tools of release and installation of roof brackets, you
can refer to the preparation of building works.
Steel tape measure
Needle nose plier
Roller
Joint wrench
Chalk line
Wire cutter
Hot air welding gun
Wire stripping pliers
Utility knife
PV special crimping pliers
Glue gun
2
INSTALLATION TOOLS LIST

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● Please use insulated tools to reduce the risk of electric shock.
● Please adopt appropriate protective measures (non-slip gloves, work clothes, etc.) to
avoid direct contact with 30V DC or higher, and avoid direct contact with sharp edges during
installation
● Please do not wear metal ornaments during installation to avoid poking through the Galaxy
Lightweight Product and causing electric shock hazards.
● DO NOT install the product in rainy weather or strong wind.
● DO NOT allow children or unauthorized personnel to approach the installation area or the
storage area of Galaxy Lightweight Product.
● During installation or wiring of Galaxy Lightweight Product, if the circuit breaker and
overcurrent protection circuit breaker cannot be turned on or the inveer cannot be turned o,
then use an opaque material to cover the array Galaxy Lightweight Product to stop the power
output.
● Do not use or install Galaxy Lightweight Product that have been damaged.
● If the suace material is damaged or worn, direct contact with the suace of Galaxy
Lightweight Product may result in electric shock.
● Do not attempt to repair any pa of the Galaxy Lightweight product.
● The lid of the junction box should be kept closed at all times.
● Do not disassemble, modify, or move any pa of the Galaxy Lightweight product.
● Do not aicially concentrate light on Galaxy Lightweight Product.
● It is impoant to note that only one piece of product can be moved in a single operation
when installing the Galaxy products.
●Before installing Galaxy Lightweight Product, the relevant authorities should be contacted to
obtain information about the installation site and construction permits, and the requirements
for installation and inspection should be obseed.
● Check the applicable building codes to ensure that the building and its structure (roof,
exterior façade, load bearing, etc.) in which Galaxy Lightweight Product are to be installed have
adequate load-bearing capacity.
● Ensure that Galaxy Lightweight Product are installed on a reproof roof, when installing
Galaxy Lightweight Product.
● Galaxy Lightweight Product are compliant with Safety Class II. These Galaxy Lightweight
Product can be used in systems where the public is likely to be exposed to voltages greater
than 50V or power greater than 240W.
3
PRE-INSTALLATION INSPECTION WORK OF GALAXY
LIGHTWEIGHT PRODUCT
WARNING
BE CAREFUL

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● The installation suace should be at and free of pits or bumps.
● Galaxy Lightweight Product must not be installed near ames or combustible objects.
● Galaxy Lightweight Product must not be immersed in water (pure or salt water), installed in
environments that are permanently wet (pure or salt water) (e.g. fountains, waves, etc.) or in
locations where water is likely to accumulate (e.g. potholes, drainage inlets, etc.).
● There is a risk of corrosion if Galaxy Lightweight Product are placed in salt spray (i.e., marine
environments) or environments containing sulfur (i.e., sulfur-containing sources, volcanoes,
etc.).
● Ensure that Galaxy Lightweight Product meet the overall technical requirements of the
system.
● Ensure that other system components do not cause damaging mechanical or electrical
peormance eects on Galaxy Lightweight Product.
● It is allowed to connect Galaxy Lightweight Product in series to increase the voltage or in
parallel to increase the current. When connected in series, the positive terminal of the Galaxy
Lightweight product is connected to the next negative terminal. When connected in parallel,
the positive terminal of the Galaxy Light product is connected to the positive terminal of the
next Galaxy Light product.
● To avoid (or minimize) the mismatch eect of the array, it is recommended to connect Galaxy
Lightweight products with similar electrical propeies on the same string.
● To reduce the risk of indirect lightning strikes, the system should be designed to avoid the
creation of loops.
● Galaxy Lightweight Product should be securely fastened so that they can withstand all
possible loads, including wind and snow loads.
● Seconda handling should be avoided as much as possible during the installation of Galaxy
Lightweight Product.
● Please ensure that the installation location of Galaxy Lightweight Product is free from
shading all year round, as shadows can cause a decrease in the power generation of Galaxy
Lightweight Product. Hot spots and long-term heat generation from diodes caused by frequent
shading of Galaxy Lightweight Product can aect the seice life of Galaxy
Lightweight products.
4
INSTALLATION WORK OF GALAXY LIGHTWEIGHT
PRODUCT
4.1 UNPACKING AND STACKING (STORAGE AND UNPACKING)
● To ensure the safety of Galaxy Lightweight Product during transpoation, it is better to
open the packaging box of Galaxy Lightweight product after reaching the installation site.
● Check whether the box is damaged before unpacking.
● It is advised that unpackers wear non-slip gloves in advance.
● Galaxy Lightweight Product should be stored in a d and ventilated environment.

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● Galaxy Lightweight Product must be shipped in the boxes provided by GoodWe and should
be stored in the original boxes before installation. Please protect the packaging from damage.
Follow the recommended unpacking procedure to open Galaxy Lightweight product packaging.
Careful handling is required during unpacking, transpoation and storage.
● DO NOT apply excessive loads or twist Galaxy Lightweight Product.
● DO NOT use wires or junction boxes to car Galaxy lightweight product.
● DO NOT stand, climb, walk or jump on Galaxy Lightweight Product.
● DO NOT to allow Galaxy Lightweight Product to come in contact with sharp objects;
scratches can directly aect the safety of Galaxy Lightweight Product.
● DO NOT place Galaxy Lightweight Product in an environment that is not reliably suppoed
or not xed.
● Changing the wiring of the bypass diode is prohibited.
● All electrical connectors need to be kept clean and d.
● Galaxy Lightweight Product are not allowed to be stacked at and the quantity should not
exceed 3 pieces. The junction box shall not be in direct contact with the front side.
4.2 CHECKING
● Please check whether the suace of Galaxy Lightweight Product is damaged, if there is
damage or wear on the suace of the products, please do not use the product.
● Please check whether the junction box, connectors and cables are damaged. Please do not
use the product if there is damage.
● Do NOT apply adhesives, paint, label or any other product on the suace of Galaxy
Lightweight products.
4.3 ROOF SUBSTRATE REQUIREMENTS
●The base layer application scenario includes pitched metal roof and at roof and TPO rolls
need to be laid on the base layer.
The suace of the substrate should be uniform, at and without sharp bumps or burrs, etc.
4.4 CONSTRUCTION REQUIREMENTS
●The recommended temperature of hot air gun for the welding of TPO membrane: 360~400℃ ,
● Use of environmental temperature restrictions: The TPO membrane can be used in a
geographical location where the monthly average temperature is a between -50℃ and 50℃ .
● Construction environment temperature restrictions: The substrate construction temperature
should be: -10℃ ~+60℃ . The ambient construction temperature should be: -10 ℃ ~ +60 ℃ .
The construction temperature of contact adhesives / cleaners, etc. should be > 5 ℃ . (Measures
should be taken to ensure safety when the ambient temperature is below 5 ℃ according to
relevant national regulations)

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4.5 CHALK LINE POSITIONING
● Measure the roof and determine the position of Galaxy Lightweight Product according to the
design drawings.
4.6 CARRYING
● To avoid damaging the cells, two people are required to lift the four corners of the Galaxy
Lightweight product (avoiding touching the position of the cells) at the same time when
caring it.
● The downward bending distance of Galaxy Lightweight Product should not exceed 300mm.
Please carefully position Galaxy into predestined location.
● Galaxy Lightweight Product should be carried upright as much as possible when handled
manually. Do NOT twist the product during transpoation.
● Care is required during the handling of Galaxy Lightweight Product to avoid them bumping
into the ground or other sharp, hard objects.
4.7 INSTALLATION
Metal roof with TPO membranes.
● Apply structural adhesive to ribs of TPO metal roof with maximum spacing of 400mm.
Silicone construction adhesive cross-section width ≥ 8mm, height ≥ 6mm.
● Car the product upright by grabbing the corners by two person
● Place the product cell side up to the adhesive area (Figure 1)
FIGURE 1
● Gently press the front of the product with a exible tool so that the Galaxy lightweight
product is rmly bonded to the rib of the metal roof.
● Lift the coil of Galaxy Lightweight Product slightly and use the hot air welding gun to spot
weld rst to x the Galaxy Lightweight Product on the metal roof (as in Figure 2).
TPO membrane Silicone construction adhesive Color steel tile
Galaxy Lightweight Product

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Hot air welding gun
Hot air welding gun
Color Steel TileSpot welding
Color Steel
Coil material
Coil material Roller
Galaxy Lightweight Product
Galaxy Lightweight Product
● After xing the head and tail of Galaxy Lightweight Product, use hot air welding gun along
the coil for full welding. Use roller gently on the coil for roller pressure (such as Figure 3) when
welding to ensure that the coil is welded to at roof. The eective welding width of the coil ≥
25mm, the eective welding area of the coil needs to cover in the color steel tile rib or rib slope,
if the welding area covers in the color steel tile valley area, it needs to be lled in the valley
so that the product is ush along the roof with the rib for eective welding (such as Figure 4,
Figure 5).
FIGURE 2
FIGURE 3

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Fill the valley
Slope of rib
Color steel tile rib
Color steel tile rib
Coil material Galaxy Lightweight Product
Galaxy Lightweight Product
Color steel tile valley
Color steel tile valley
Slope of rib
Fill the valley
FIGURE 4
FIGURE 5
● The distance between two adjacent Galaxy Lightweight Product is 30mm±10mm. A 300mm
construction access channel is reseed between two rows of Galaxy Lightweight Product on
the junction box side. A 170mm construction access should be reseed on the tail side of the
product. (Figure 6).
≥ 25mm
≥ 25mm

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FIGURE 6
FIGURE 7
TPO at roong installation form：
● Mark the position of the array.
● Apply silicone construction adhesive to the EPDM strips on the back side of the product with
a cross-sectional width of at least 8 mm and height of at least 6 mm.
● Two people grip the four corners of Galaxy Lightweight product, car them veically, and
then face up to bond the silicone construction adhesive strip on the back of the products to
the at roof. Use a exible tool to gently press the front of the product to make the silicone
construction adhesive and strips fully bonded. (as in Figure 7).
● Lift the Galaxy lightweight product slightly at both ends of the coil and use a hot air torch to
spot weld rst to x the product to the roof (as in Figure 8).
Silicone Construction adhesive
Strip
Galaxy Lightweight Product
300mm 170mm
30mm

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Hot air welding gun
Hot air welding gun
Coil material
Coil material Roller
Galaxy Lightweight Product
Galaxy Lightweight Product
FIGURE 8
FIGURE 9
FIGURE 10
FIGURE 11
● After xing the head and coil of the Galaxy Lightweight Product, use the hot air welding gun
along the coil for full welding. Use rollers gently on the coil roll pressure when welding
(as Figure 9) to ensure that the coil secured to at roong. The eective welding width of the
head and tail coil should be at least 25mm (such as Figure 10, such as Figure 11).
≥ 25mm
≥ 25mm

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● The distance between two adjacent Galaxy Lightweight Product is 30mm. A 300mm
construction access channel is reseed between two rows of Galaxy Lightweight Product on
the junction box side. A 170mm construction access should be reseed on the tail side of the
product. (Figure 12).
300mm 170mm
5
ELECTRICAL INSTALLATION
5.1 ELECTRICAL PERFORMANCE
●The nominal values of electrical peormance parameters such as Isc, Voc and Pmax of Galaxy
Lightweight Product have an error of ±3% from those under standard test conditions. Standard
test conditions for Galaxy Lightweight Product: irradiance 1000 W/m2, cell temperature 25° C,
atmospheric mass AM 1.5.
● When Galaxy Lightweight Product are connected in series, the total voltage is the sum of
voltage of eve single Galaxy Lightweight Product in the string, and when Galaxy Lightweight
Product are connected in parallel, the nal current is the sum of the current of eve string of
Galaxy Lightweight Product, as shown in Figure 6-1. Galaxy Lightweight Product of dierent
electrical peormance models should not be connected in one string.
FIGURE 12
30mm

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FIGURE 5-1 SERIES-PARALLEL ELECTRICAL DIAGRAM
● The maximum number of single strings of Galaxy Lightweight Product that can be
connected in series must be calculated in accordance with the requirements of local electrical
requirements and regulations. and the value of its open-circuit voltage at the lowest expected
local temperature conditions must not exceed the maximum system voltage value specied for
Galaxy Lightweight Product (maximum system voltage for the products is DC1000V/DC1500V
- the actual system voltage is designed according to the selection of the product models and
inveers) and other values required for DC electrical components.
The open circuit voltage correction factor can be calculated with following formula:
● CVoc=1-βVoc×(25-T) where T is the minimum ambient temperature expected at the system
installation location and β(%/° C) is the temperature coecient of the open circuit voltage of
selected Galaxy Lightweight product(refer to the corresponding Galaxy Lightweight product
parameter table).
● If a reverse current exceeding the maximum fuse current of the Galaxy Lightweight product
may pass through the Galaxy Lightweight product, an overcurrent protection device of the
same size must be used to protect the product. If the number of parallel connections is more
than or equal to 2 strings, there must be an overcurrent protection device on each string of the
products, as shown in the gure 6-1.
5.2 CABLE AND CONNECTING WIRES
● Galaxy Lightweight Product shall be connected by using IP67 rated junction boxes, which
shall provide safe protection for the conductors and their corresponding connections, and
accessible protection for non-insulated live pas. The junction box consists of a connected
cable and IP67 rated connectors to facilitate series connection between Galaxy Lightweight
Product. A single product has two separate wires connected to two separate junction boxes,
one positive and one negative. Two Galaxy Lightweight Product can be connected in series
by inseing the positive connector into the socket of the negative connector of the adjacent
product.

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● Use dedicated solar cables and appropriate connectors (wires should be encased in age-
resistant conduit or, if exposed to air, should be age-resistant themselves) and ensure that
the cables are electrically and mechanically sound, in accordance with local re, building and
electrical codes. Installers should only use single-core solar cables, 2.5-16mm2 (5-14 AWG),
90° C rated, with appropriate insulation to withstand the maximum possible system open
circuit voltage (as approved by EN 50618). Appropriate wire sizes need to be selected to
minimize voltage drop. All wiring and electrical connections comply with the requirements of
the appropriate National Electrical Code or standard. Avoid mechanical damage to the cable or
Galaxy Lightweight Product when the cable is secured to the bracket. Do not press the cable
with force. The cable shall be secured to the bracket by specially designed aging resistant cable
ties and wire clips. Although the cable is resistant to aging and water, it should be protected
from direct sunlight and rain. The minimum bending radius of the cable should be 43mm.
FIGURE 5-1 SERIES-PARALLEL ELECTRICAL DIAGRAM
5.3 CONNECTOR
● Please keep the connector d and clean, and make sure that the nut of the connector is
tightened before connecting. Do not connect the connector when it is wet, diy or in other
unfavorable condition. If the connector is not connected properly to the other polarity, the
connector is not waterproof. It is necessa to connect or take appropriate measures to avoid
the inltration of water vapor and dust as soon as possible after the module is mechanically
installed to the roof. Avoid having connectors being exposed to direct sunlight and immersed in
water. Avoid having connectors falling on the ground or on the roof. Incorrect connections may
produce arcing and electric shock. Make sure all electrical connections are secure. Make sure
that all connectors with locking are fully connected.
● It is not recommended that connectors of dierent models be connected and used together.
5.4 BYPASS DIODE
● The cell strings within a solar module are protected by bypass diodes in parallel and
encapsulated in a junction box. When a hot spot phenomenon occurs locally in a module, the
diode will activate so that string current no longer ows from the hot spot cells, thus limiting
module heating and peormance loss. Note that the bypass diode is not an overcurrent
protection device. Contact the installer or system maintainer when a diode failure is detected
or suspected. Do not attempt to open the module's junction box by yourself.

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5.5 ELECTRICAL REQUIREMENTS FOR THE INSTALLATION OF GALAXY LIGHTWEIGHT
PRODUCT
Inspection before installation
● No visible defects.
● Models and specications should meet the requirements of the design drawings.
● Accessories and spare pas are available;
● For electrical parameters, please refer to the appendix product specication.
Preparation of main tools
Preparation of main tools
● Multimeter: For measuring the open-circuit voltage of Galaxy Lightweight Product.
● Angle measuring instrument, level, etc.: measuring the installation angle of the Galaxy
lightweight product array.
● Installation tools and spare pas covered in Section 4.
5.6 MATERIAL PREPARATION
Please check whether the type and quantity of the arriving material is correct against the
material list in conguration sheet.
Galaxy Lightweight Product Electrical Wiring Requirements
● Wiring with clear, unambiguous and easily understood wire number identication.
● Jumper cable diameter must be exceed the original Galaxy lightweight product cable
diameter, and ame retardant and insulation peormance should also be no less than that of
Galaxy lightweight product cable.
● Galaxy Lightweight Product should be connected to each other in the shoest cable run
possible. When Galaxy Lightweight Product require long straddle connections, t to minimize
the dierence in the total length of each set of string-connected cables.
● The wiring terminals should be in good contact. When connecting each pa of the Galaxy
lightweight product in series, it is best to test once each section is completed with a multimeter
to string connectivity.
Electrical wiring method of Galaxy Lightweight Product
● Wiring in accordance with the wiring in the electrical schematic.
● For products connected in series, the "+" pole of one product is connected to the "-" pole of
another product. Extension cables are required if connection of products between dierent
rows is needed.
● Please use entension cables that are for solar application specically.

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FIGURE 5-3 PRODUCT JUMPER CONNECTION OPERATION INSTRUCTIONS
(FRONT VIEW)
● When a group of series connections are connected as shown in the drawing, the remaining
group of "+" and "-" pole terminals are connected to the combiner connector or combiner box.
● Parallel connection of all accesso strings are done at the combiner connector or combiner
box.
Note: This document only describes the wiring requirements and wiring principles. Since the
roof of each site may not be the same, it is not possible to make uniform wiring process for
each project here. Wiring can be done later in accordance with the product installation layout
drawings in each project.
5.7 COMBINER BOX INSTALLATION REQUIREMENTS
● Connect the combiner kit to the product array according to the electrical schematic.
● Docking plugs to be plugged in place and rmly connected.
● The combiner kit can be xed on the bracket, the alignment is neat and easy to maintain.
● The connection of the cable should avoid cable stress and friction due to wind-blown
vibration and damage to the outer skin of the cable.
● After the terminals of the combiner kit are connected, use the same cable clamps as the
terminals of the product to clamp up the ends of the terminals.
＋
-
Galaxy G3 product
serial wireroof substrate
Galaxy Lightweight Product

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6
ELECTRICAL CONSTRUCTION PROCESS
6.1 CONSTRUCTION PROCESS
Operating conditions
● Assembly of product array is completed.
● Installation of inveer and distribution box is completed.
Preparation of main tools
● Impact drill: For drilling holes in the installation position of PVC and other line pipes and pipe
cards.
● MC4 crimper: For on-site DC cable MC4 splice plug production.
● Multimeter, megohmmeter: For cable conduction and insulation testing.
● Wire stripping pliers: for cable stripping.
Main Materials
● DC cables for photovoltaics.
● AC cables.
● Cable DC connectors use the same type of MC4 as the product or a compatible one.
Installation Engineering Process
● Determine the cable run and AC/DC conduit requirement after on-site measurement.
● Conduit is required for cables between array and inveer. Conduit is required for cables
between inveer and distribution box, distribution box and household electricity box.
Conduit laying requirements
● Follow local electrical standards and regulations when designing and laying the conduits,
requirements of local standards and regulations prevails if contradictions is found.
When laying electrical conduits on the wall, they should be laid in the corners of the wall, in the
same direction along rainfall pipes and air-conditioning pipes.
● It is advisable to avoid the crossover of AC and DC directions in the piping between
equipment.
Cable laying
Requirements for cable laying:
● When wiring each system, the type of conductor, voltage level, etc. are inspected according
to the provisions of the current national standards.
● Remove water and debris from the conduit or wire channel before threading.
● When using the crimping method to connect the wire, the specications of the terminal
copper sleeve crimp should be consistent with the cross-section of the cable core.

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● AC and DC cables should be run in dierent conduits to ensure safety.
● After the cable is installed, the joints should be glued and sealed to prevent water from
seeping into the conduit. The opening of exposed conduits should be plugged with soft cloth
to avoid the ent of foreign objects.
● Cable bending radius ≥ 6D.
● Wiring through conduits to avoid high temperature heat generating objects as much as
possible.
● Conduits need to be secured by conduit clips.
● The AC and DC cables connected to the inveer and distribution box should to be marked
with the cable number at both ends.
DC side MC4 cable connector installation.
● Arrange MC4 cable connectors and pins according to their intended polarity.
● Strip the DC PV cable by using wire strippers according to the length of the copper core
pins.
● Inse the DC PV cable into the pins, and crimp the pins.
● Inse the pins into the MC4 male and female connectors and fasten them with the MC4
special screwdriver.
● Plugging in the male and female MC4 cable connectors and test the tightness of the
connection.
MC4 CABLE CONNECTOR PRODUCTION METHOD
5.plug connector4.screw on connector
3.plug pin to connector1.plug pin to connector 2.crimp pins

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Sub-project requirements
● PVC ame-retardant rigid plastic pipe and its attached oxygen index should be 27% or more.
● Insulation of the cables should be tested before being threaded into conduits.
● The minimum allowable bending radius of the cable laid through the pipe is six times of cable
diameter.
● The conduit clip spacing of exposed conduits should be:
Φ20 pipes are laid openly along the wall with a maximum distance of 1.5m between pipe clips;
Φ25 pipes are laid openly along the wall with a maximum distance of 2m between pipe clips.
Allowable value of deviation for the laying of open piping.
● Cables from dierent circuits, dierent voltages or AC and DC cables, should not be worn in
the same conduit.
● There shall be no joints in the wires in the conduits.
● Connect the MC4 plugs tightly.
7
CAUTIONS
The following maintenance measures are recommended to ensure that the products achieve
optimum peormance and maximum system power generation.
Product appearance inspection focuses on the following：
● Whether the product is damaged or not.
● Whether there are sharp objects touching the suace of the product.
● Whether the product is shaded by obstacles and foreign objects, new grown trees, newly
erected poles, etc.
● Whether there is corrosion near the cell grid wire.
Product cleaning. The accumulation of dust or di on the suace of the product will reduce
the power output. It should be cleaned regularly to keep the suace clean, generally should
be cleaned at least once a month. Cleaning frequency should be adjusted depending on local
environment.
Please note the following when cleaning photovoltaic products:
● Make sure the products and cables are not broken before cleaning the product.
● First rinse the product with clean water, and then wipe the water stains d with a soft cloth,
it is strictly prohibited to use corrosive solvents to clean or wipe PV products with hard objects.
Straightness <1.5mm/m
Veicality <1.5mm/m