DMEGC DMG M6-60BT Series User manual

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Hengdian Group DMEGC Magnetics Co., Ltd
DMEGC Solar Energy
Hengdian Industrial Area, Dongyang City, Zhejiang Province China
Tel: [phone]
Fax: [phone]
Email: [email protected]
DMEGC Photovoltaic Modules Installation Manual
Version：202005

DMEGC Photovoltaic Modules Installation Manual
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Table of Contents
1. GENERAL INFORMATION - 1 -
2. SAFETY PRECAUTIONS - 1 -
2.1 GENERAL SAFETY - 1 -
2.2 OPERATING SAFETY - 2 -
2.3 INSTALLATION SAFETY - 3 -
2.4 FIRE SAFETY - 4 -
3. PRODUCT IDENTIFICATION - 4 -
4. MECHANICAL INSTALLATION - 5 -
4.1 SELECTING THE LOCATION - 5 -
4.2 TILT ANGLE SELECTION - 5 -
4.3 CONVENTIONAL REQUIREMENTS - 6 -
4.4 INSTALLATION METHODS - 7 -
4.5 ATTACHMENT GUIDELINES - 8 -
5. ELECTRICAL INSTALLATION - 11 -
6. GROUNDING - 12 -
7. MAINTENANCE AND CARE - 13 -
7.1 VISUAL INSPECTION - 14 -
7.2 CLEANING - 14 -
7.3 INSPECTION OF CONNECTOR AND CABLE - 14 -
8. DISCLAIMER OF LIABILITY - 15 -

DMEGC Photovoltaic Modules Installation Manual
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1. General Information
Thanks for choosing DMEGC Solar PV modules.
This guide contains information regarding the installation and safe handling of DMEGC photovoltaic
module (hereafter is referred to as “module”)。
All instructions should be read and understood before attempting to install. If there are any questions,
please contact our sales department for further explanation. The installer should conform to all the safety
precautions in the guide when installing the module. Local codes should also be followed in such
installation.
Before installing a solar photovoltaic system, the installer should become familiar with the mechanical
and electrical requirement for such a system. Keep this guide in a safe place for further reference (care and
maintenance) and in case of sale or disposal of the module.
2. Safety precautions
DMEGC solar Modules are designed to meet the requirements of IEC 61215 and IEC 61730, applocation
class A, Modules rated for use in this applications class may be used in system operating at greater than
50V DC or 240W, where general contact access is anticlpated Modules qualified for safety through IEC
61730-1 and IEC 61730-2 and within this application class are considered to meet the requirements for
safety class II equipment.
2.1 General Safety
Installing solar photovoltaic systems requires specialized skills and knowledge.
Installation must only be performed by authorized and trained personnel. Installers must assume all
risks of injury that might occur during installation, including, but not limited to, the risk of electric
shock.
One single module may generate more than 30V DC when exposed to direct sunlight. Contact with a
DC voltage is potentially hazardous and should be always avoid.
PV modules are recommended to be installed at altitudes of less than 2000m.
Modules can be ground mounted, mounted on rooftops. The proper design of support structures lies
within the responsibility of the system designers and installers.
When installing the system, abide to all local, regional and national statutory regulations. Obtain a

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building permit if necessary.
The electrical characteristics are within ±3 percent of the indicated values of Isc, Voc and Pmax under
standard test conditions (irradiance of 1000 W/m², AM 1.5 spectrum, and a cell temperature of 25 °C
(77 °F) ).
Only use equipment, connectors, wiring and support frames suitable for solar electric systems.
Always use fall protection equipment when working from heights of 6 feet (183cm) or above. Follow
Occupational Safety and Health Act (OSHA) or local governing safety regulations regarding Fall
Protection. (UL Only) .
Do not sit, stand, step or walk on any side of the module, including the frames. Do not permit any part
of the module(s) to be submerged or allow for constant water to soil the module(s) unless it's natural
rain fall or periodic cleaning.
2.2 Operating safety
Do not open the package of DMEGC Solar Modules during transportation and storing until they are
ready to be installed.
Store pallets in a ventilated, rain-proof and dry location until the Modules are ready to be unpacked.
During the transportation, do not to apply direct pressure on the backsheet or front glass. .
Inappropriate transport and installation may break the module and void the warranty.
Do not lift the module by holding the module’s junction box or electrical leads. Do not place any
heavy or sharp objects on the module.
Do not attempt to disassemble the modules, and do not remove any attached nameplates or
components from the modules.
Do not use mirrors, other magnifiers or artificially concentrated sunlight onto the modules.
Do not apply paint or adhesive to the module top surface or backsheet.
To avoid damage to the backsheet and cells, do not scratch, dent or hit the backsheet.
Do not drill holes in the frame. This may compromise the frame strength, cause corrosion of the frame
and void the warranty.
Do not scratch the anodized coating of the frame (except for grounding connections at the grounding
connection point on the back side of the module). It may cause corrosion of the frame or compromise

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the frame strength.
A module with broken glass or torn backsheet cannot be repaired and must not be used since contact
with any module surface or the frame can cause an electric shock.
Work only under dry conditions, and use only dry tools. Do not handle modules under wet conditions
unless wearing appropriate protective equipment.
When storing uninstalled modules outdoors for any period of time, always cover the modules and
ensure that the glass faces down on a soft flat surface to prevent water from collecting inside the
module and causing damage to exposed connectors.
2.3 Installation safety
Never disconnect electrical connections or unplug connectors while the circuit is under load.
Contact with electrically active parts of the modules, such as terminals, can result in burns, sparks and
lethal shock whether or not the module is connected.
Do not touch the PV module unnecessarily during installation. The glass surface and the frame may be
hot; there is a risk of burns and electric shock.
Do not work in the rain, snow or in windy conditions.
Avoid exposing cables and connectors to direct sunlight and scratches or cuts in order to prevent
insulation degradation.
Keep children well away from the system while transporting and installing mechanical and electrical
components.
Completely cover the module with an opaque material during installation to prevent electricity from
being generated.
Do not wear metallic rings, watchbands, ear, nose, lip rings or other metallic devices while installing
or troubleshooting photovoltaic systems.
Use only insulated tools that are approved for working on electrical installations.
Follow the safety regulations (e.g., safety rules for working on electrical power plant stations) of your
regions and for all other system components, including wires and cables, connectors, charging
regulators, inverters, storage batteries, rechargeable batteries, etc.
Under normal conditions, a photovoltaic module is likely to experience conditions that produce more

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current and/or voltage than reported at standard test conditions. Accordingly, the values of Isc and Voc
marked on this module should be multiplied by a factor of 1.25 when determining component voltage
ratings, conductor current ratings, minimum factor of fuse sizes, and size of controls connected to the
PV output.
Only use same connectors to connect modules to form a string, or connect to another device.
Removing the connectors will void the warranty.
2.4 Fire Safety
Consult your local authority for guidelines and requirements for building or structural fire safety.
According to IEC 61730-2 standard, DMEGC modules have been rated Fire Class A, and are suitable
for mounting on to a Class A roof.
For roof installations, modules should be mounted over afire resistant covering suitable for this
application, with adequate ventilation between the module backsheet and the mounting surface.
Roof construction and installation may affect the fire safety of the building, Improper installation may
create hazards in the event of a fire.
Use appropriate components such as fuses, circuit breakers and grounding connectors as requires by
local authority.
Do not use modules near equipment or in locations where flammable gases may be generated or
collected.
3. Product identification
Each module has two labels providing the following information:
1.Nameplate: describes the product type; rated power, rated current, rated voltage, open circuit voltage,
short circuit current, all as measured under standard test conditions; weight, dimensions, the maximum
system voltage etc;
2. Barcode: each single module has a unique serial number. The serial number contains the model number,
manufacturing time, and corresponding serial number of the module (except for customer designation) ，
Each module has only one barcode. It is permanently attached to the interior of the module(except the
whole black modules), is visible from the top front of the module. This bar code is inserted prior to
laminating.

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4. Mechanical Installation
4.1 Selecting the location
Select a suitable location for the module installation, where they receive maximum sunlight
throughout the year.
The module must be facing true south in northern latitudes and true north in southern latitudes.
The module should not be shaded at any time of the day.
The recommended ambient temperature should be within -20℃to 40℃, the temperature limits are
defined as the monthly average high and low of the installation site, the limit operating temperature
should be -40℃to 85℃.
DMEGC Solar Modules have passed the IEC61701 salt-mist, but galvanic corrosion can occur
between the aluminum frame of the Modules and mounting or grounding hardware if such hardware is
comprised of dissimilar metals. When DMEGC recommends that the module be installed at the
seaside, the module should be installed more than 500m away from the coastline. Confirm with
DMEGC, install after obtaining approval.
Modules must be installed or operated in areas where salt, hail, snow, sand, dust, air pollution,
chemically active, acid rain, soot, etc., are excessive. Modules must be sited in locations where
aggressive substances such as salt or salt-water, or any other type of corrosive agent, could affect the
safety and/or performance of the modules.
Do not use module near equipment or in locations where flammable gases can be generated or
collected.
4.2 Tilt Angle Selection
The tilt angle of the PV module is measured between the surface of the PV module and a horizontal
ground surface. The PV module generates maximum output power when it faces the sun directly.
For detailed information on the best elevation tilt angle for the installation, refer to standard solar
photovoltaic installation guides or a reputable solar installer or systems integrator.
Dust building up on the surface of the modules can impair
Module performance. DMEGC solar recommends installing the modules with a tilt angle of at least
10 degrees, making it easier for dust to be washed off by rain.

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4.3 conventional requirements
The module mounting structure must be made of durable, corrosion-resistant and UV-resistant
material. Always use a tested and certified mounting structure approved for your system design.
Ensure the installation method and supporting system of modules is strong enough to withstand all the
load conditions. Always observe the instructions and safety precautions included with the module
support frames.
In regions with heavy snowfall in winter, select the height of the mounting system so that the lowest
edge of the module is not covered by snow for any length of time. In addition, ensure that the lowest
portion of the module is placed high enough so that it is not shaded by plants, trees or damaged by
ground soil moved by or through the air.
For ground mounting systems, the minimum distance DMEGC recommend from the ground to the
bottom of the module is at least 24 inches (60cm).
Modules must be securely attached to the mounting structure. For Clamping System installation
methods, the recommended maximum compression for each clamp is 2900 PSI (20 Mpa) in order to
avoid potential damages to module frames. Follow the instruction of the clamping system supplier.
Provide adequate ventilation under the modules in conformity to your local regulations.
Provide adequate ventilation under the modules in conformity to your local regulations. A minimum
distance of 10 cm between the roof plane and the frame of the module is generally recommended.
Avoid the frame receiving the lateral tension and pressure, causing the flame off or crushing the glass.
Before installing modules on a roof, always ensure the roof construction is suitable. In addition, any
roof penetration required to mount the module must be properly sealed to prevent leaks.
Observe and take into account the linear thermal expansion of the module frames (the recommended
minimum distance between two modules is 1 cm).
When installing a module on a pole, select a pole and module mounting structure that will withstand
the anticipated wind load and snow load for the area.
Ensure modules are not subjected to wind or snow loads exceeding the maximum permissible loads,
and are not subject to excessive forces due to the thermal expansion of the support structures. Never
allow modules overlap or exceeds the rooftop: Refer to the following installation methods for more
detailed information.

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4.4 Installation methods
4.4.1 Mounting with Bolts
Modules can be attached through the mounting holes on the back frame of the module, by fixing the
module to the support rails with bolts. The frame of each module has 4 mounting holes, ideally placed to
optimize the load handling capability, to secure the modules to supporting structure.
To maximize mounting longevity, DMEGC strongly recommends the use of corrosion proof (stainless
steel) attachment hardware. The tightening torque (suggest stainless steel M8 bolts) should be around 15-20
Nm, the mounting details are shown in the following figures:
4.4.2 Mounting with Clamps
When choosing this type of clamp-mounting method, use at least four clamps on each module, two
clamps should be attached on each long sides of the module (for portrait orientation) or each short sides of
the module (for landscape orientation). Depending on local wind and snow loads, additional clamps may be
required to ensure that modules can bear the load.
Modules clamps should not come into contact with the front glass and must not deform the frame. Be
sure to avoid shadowing effects from the module clamps. The mounting details are shown in the following
figures.
Framed module clamp

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Frameless module clamp
4.5 Attachment guidelines
The Standard/lower loading capacity applies to normal environment : the modules are tested under a
maximum positive pressure of 2400 Pa, and negative pressure of 2400 Pa, the modules are designed to
meet a maximum positive pressure of 1600Pa, and negative pressure of 1600 Pa, this design load was then
tested with a safety factor of 1.5 times.
The high loading capacity applies to severe environment ,like storm, big snow, etc: the modules are
tested under a maximum positive pressure of 5400 Pa, and negative pressure of 2400 Pa, the modules are
designed to meet a maximum positive pressure of 3600Pa, and negative pressure of 1600 Pa, this design
load was then tested with a safety factor of 1.5 times.

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4.5.1Framed module bolt and clamp installation

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4.5.2 Frameless clamp installation

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5. Electrical Installation
Any hardware used must be compatible with any other used material to avoid galvanic corrosion.
Defects caused by corrosions void the warranty.
It is not recommended to use modules with different configurations (grounding, wiring) in the same
system.
Excessive cables must be organized or fixed in an adequate way, e.g. attached to the mounting
structure by using non-metallic cable ties. Solar cables, connectors and junction boxes should not be
exposed to water exposure, and snow, and rain or water submersion for a long period of
time(IP65/67/68).
For applications requiring high operating voltage several modules can be connected in series to form a
string of modules; the system voltage is then equal to the sum of the voltage of each module.
For applications requiring high operating currents several strings of modules can be connected in
parallel; the system current is then equal to the sum of the current of each string of modules.
The maximum system voltage is 600 volts ,1000 volts or 1500 volts depending on the product family
DC according to standards.
The maximum number of series connected modules depends on system design, the type of inverter
used and environmental conditions.
Based on the maximum series fuse rating of module and local electrical installation code, always make
sure DMEGC PV modules are assembled with the appropriate string fuse for circuit protection.
There is no specific limitation on the number of modules that can be connected in parallel, the number
of modules is determined by system design parameters such as current or power output.
To prevent the cables and the connectors from overheating, the cross section of the cables and the
capacity of the connectors must be selected to suit the maximum system short circuit current. The
recommended cable is PV wire with a cross section of at least 4mm2.
Caution: do not secure the cables too tight. Any cable damage caused by cable management system
is not covered under DMEGC’s warranty.
Always refer to the cable manufacturer's bending radius which includes the radius just behind the
connectors.
When designing large modules arrays connected to a single inverter, always take into account the
resulting isolation resistance (Riso), which decrease increasing the number of modules in the array. A
too low Riso can results in inverter faults. Please refer to local regulations to determine the system
wires size, type and temperature.

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DMEGC modules are supplied with connectors used for system electrical connections. We strongly
recommends using the genuine connector type specified by DMEGC's product data sheet. Any choice
of a different connector type other than specified may void the warranty of the module.
To ensure reliable electric connection and to prevent possible intrusion of humidity, two connectors
must be mated and locked together until a click can be heard.
Long-term exposure to wet environments may cause connectors' poor connectivity, resulting in current
leakage and poor conductivity which voids the warranty. DMEGC recommends proper
connector/cable/wire management to prevent moisture intrusion. Depending on the amount of
humidity, DMEGC recommends periodic inspections of the installation system to maintain optimal
module performance.
The DC current generated by photovoltaic systems can be converted into AC and fed into a public
Grid. As local utilities’ policies on connecting renewable energy systems to the Grids vary from region
to region. Always seek the advice from a qualified system designer or integrator. Building permits,
inspections and approvals by the local utility are generally required.
Especially for larger installations DMEGC recommends lightning protection following the local
requirements and regulations.
6. Grounding
For grounding and bonding requirements, please refer to regional and national safety and electricity
standards. If grounding is required, use a recommended connector type for the grounding wire.
DMEGC PV Modules use an anodic oxidized aluminum frame to resist corrosion, so the frame of
Modules should be connected to the equipment grounding conductor to prevent thunder and electrical
shock.
The frame rails have pre-drilled holes marked with a grounding sign, these holes should be used for
grounding purposes and should not be used for mounting the Modules.
We recommends always refer to local state and national code requirements for PV module grounding.
DMEGC highly recommends negative grounding if it's allowed by local authorities.
When attaching the frame grounding hardware and wire to the frame it must be placed corresponding
to the ground symbol stamped location to ensure proper electrical connection.
DMEGC recommends one of the following parts for grounding:
1) Use M8 bolt and washer to bond the ground wire and aluminum frame through the grounding hole
(as shown below left). The tightening torque is 3-7Nm. All nuts and washers should be made of stainless
steel. 4-14 mm2(AWG 6-12) exposed copper wire is recommended as ground wire.

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2) Grounding by using grounding clamp
The grounding clip assembly consists of a slider, base, and self–captivating thread–cutting screw or
8–32 screw and hex nut. The grounding clip accepts solid uninsulated copper wire sizes 10 or 12 AWG.
We recommend customers use SolKlip Grounding Clip Assemblies 1954381–[]; SolKlip Grounding
Clip Assemblies 1954381–[ ] are used with metal–framed photovoltaic (solar) panels and related products
that require grounding for safety reasons.
3) Addition Third-party Grounding Devices
DMEGC PV Modules can be grounded using third party grounding devices so long as they are
certified for grounding modules and the devices are installed according to the manufacturer’s specified
instructions.
7. Maintenance and care
It is required to perform regular inspection and maintenance of the modules, especially during the
warranty period. To ensure optimum module performance, DMEGC recommends the following
maintenance measures:

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7.1 Visual Inspection
Inspect the modules visually to find if there are any visual defects, If there are, the following items should
be evaluated:
If modules are observed having slight cell color differences at different angles, this is a normal
phenomenon of modules with anti-reflection coating technology.
Whether the glass is broken.
No sharp objects are in contact with the PV module surfaces.
PV modules are not shaded by unwanted obstacles and; or foreign material.
Corrosion along the cells’ bus-bar. The corrosion is caused by moisture intrusion thought the module
back sheet. Check the back sheet for damage.
Check whether the back sheet is burn out. g) Check if screws and mounting brackets are tight, adjust
and tighten as necessary.
7.2 Cleaning
Clean the glass surface of the module as necessary. Always use water and a soft sponge or cloth for
cleaning.
A mild, nonabrasive cleaning agent can be used to remove stubborn dirt.
In order to reduce the potential for electrical and thermal shock, DMEGC recommends cleaning PV
modules during early morning or late afternoon hours when solar radiation is low and the modules are
cooler, especially in regions with hotter temperatures.
Never attempt to clean a PV module with broken glass or other signs of exposed wiring, as this
presents a shock hazard.
Never use chemicals when cleaning modules as this may affect the module warranty and energy
output.
7.3 Inspection of Connector and Cable
It’s recommended to implement the following preventive maintenance every 6 months:
Check the sealing gels of the junction box for any damage.
Examine the PV module(s) for signs of deterioration. Check all wiring for possible rodent damage,
weathering and that all connections are tight and corrosion free. Check electrical leakage to ground.
If any problem arises, consult a professional solar service provider for suggestions. Caution: observe

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solar manufacturers' maintenance instructions for all components used in the system, such as support
frames, charging regulators, inverters, batteries etc.
8. Disclaimer of liability
Because the use of this manual and the conditions or methods of installation, operation, use and
maintenance of photovoltaic (PV) product are beyond DMEGC’s control, DMEGC does not accept
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.
No responsibility is assumed by DMEGC for any infringement of patents or other rights of third
parties, which may result from use of the PV product. No license is granted by implication or otherwise
under any patent or patent rights.
The information in this manual is based on DMEGC’s knowledge and experience and is believed to be
reliable; but such information including product specification (without limitations) and suggestions do not
constitute a warranty, expresses or implied. DMEGC reserves the right to change the manual, the PV
produce, the specifications, or product information sheets without prior notice.

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Appendix：
Group 1 (60 156.75 cells module with aluminium frame xxx=255~310,in increment of 5)
DMGxxxM6-60BT
DMGxxxM6-60BW
DMGxxxM6-60ST
DMGxxxM6-60SW
DMGxxxM6-60BB
DMxxxM2-G60BT
DMxxxM2-G60BW
DMxxxM2-G60ST
DMxxxM2-G60SW
DMxxxM2-G60BB
Group 2 (60 156.75 cells modules with frameless xxx=255~310,in increment of 5)
DMGxxxM6-60XT
DMGxxxM6-60XW
DMxxxM2-G60NT
DMxxxM2-G60NW
Group 3 (60 156.75 Bifacial cells modules with aluminium frame xxx=295~315,in increment of 5)
DMGxxxB6-60ST
DMGxxxB6-60BT
DMxxxM2-B60ST
DMxxxM2-B60BT
DMGxxxB6-60SW
DMGxxxB6-60BW
DMxxxM2-60SW
DMxxxM2-60BW
Group 4 (60 156.75 Bifacial cells modules with frameless xxx=295~315,in increment of 5)
DMGxxxB6-60NT
DMGxxxB6-60NT
DMxxxM2-B60NT
DMxxxM2-B60NT
Group 5 (72 156.75 cells modules with aluminium frame xxx=355~370,in increment of 5)
DMGxxxM6-72BT
DMGxxxM6-72BW
DMGxxxM6-72ST
DMGxxxM6-72SW
DMGxxxM6-72BB
DMxxxM2-G72BT
DMxxxM2-G72BW
DMxxxM2-G72ST
DMxxxM2-G72SW
DMxxxM2-G72BB
Group 6 (72 156.75 Bifacial cells modules with aluminium frame xxx=355~375,in increment of 5)
DMGxxxB6-72ST
DMGxxxB6-72BT
DMGxxxB6-72SW
DMGxxxB6-72BW
DMxxxM2-B72ST
DMxxxM2-B72BT
DMxxxM2-B72SW
DMxxxM2-B72BW
Group 7 (120 156.75 cells modules with aluminium frame xxx=310~325,in increment of 5)
DMGxxxM6-120HST
DMGxxxM6-120HBT
DMGxxxM6-120HSW
DMGxxxM6-120HBW
DMxxxM2-G60HST
DMxxxM2-G60HBT
DMxxxM2-G60HSW
DMxxxM2-G60HBW
Group 8 (120 156.75 Bifacial cells modules with aluminium frame xxx=310~330,in increment of 5)
DMGxxxB6-120HST
DMGxxxB6-120HBT
DMGxxxB6-120HSW
DMGxxxB6-120HBW
DMxxxM2-B60HST
DMxxxM2-B60HBT
DMxxxM2-B60HSW
DMGxxxM2-B60HBW

DMEGC Photovoltaic Modules Installation Manual
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Group 9 (144 156.75 cells modules with aluminium frame xxx=360~380,in increment of 5)
DMGxxxM6-144HST
DMGxxxM6-144HBT
DMGxxxM6-144HSW
DMGxxxM6-144HBW
DMxxxM2-G72HST
DMxxxM2-G72HBT
DMxxxM2-G72HSW
DMxxxM2-G72HBW
Group 10 (144 156.75 Bifacial cells modules with aluminium frame xxx=360~385,in increment of 5)
DMGxxxB6-144HST
DMGxxxB6-144HBT
DMGxxxB6-144HSW
DMGxxxB6-144HBW
DMxxxM2-B72HST
DMxxxM2-B72HBT
DMxxxM2-B72HSW
DMxxxM2-B72HBW
Group 11 (120 166 cells modules with aluminium frame xxx=355~375,in increment of 5)
DMxxxM6-G60HST
DMGxxxM6-G60HBT
DMxxxM6-G60HSW
DMxxxM6-G60HBW
Group 12 (120 166 Bifacial cells modules with aluminium frame xxx=355~375,in increment of 5)
DMxxxM6-B60HST
DMxxxM6-B60HBT
DMxxxM6-B60HSW
DMxxxM6-B60HBW
Group 13 (144 166 cells modules with aluminium frame xxx=425~445,in increment of 5)
DMxxxM6-G72HST
DMxxxM6-G72HBT
DMxxxM6-G72HSW
DMxxxM6-G72HBW
Group 14 (144 166 Bifacial cells modules with aluminium frame xxx=425~445,in increment of 5)
DMxxxM6-B72HST
DMxxxM6-B72HBT
DMxxxM6-B72HSW
DMxxxM6-B72HBW