DUALSUN FLASH Manual

Installation, operation and
maintenance instructions
DualSun FLASH
Version 1.3 –April 2020
Contents of this document are subject to change without notice.
In case of inconsistencies or conflicts between the English version and any other versions of this document,
the English version shall prevail and take control in all respects.
© DualSun SAS
Languages:
p.2 p.20 p.38 p.56

EN
Installation, operation and
maintenance instructions
DualSun FLASH
Head office Manufacturing site
2 rue Marc Donadille Rue du Champ de Foire
13013 Marseille - France 01640 Jujurieux –France
We reserve the right at any time to make any changes that we deem useful.
© DualSun SAS
Version 1.3 –April 2020
DualSun online library

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Table of contents
1Introduction ................................................................................................................3
1.1 Symbols used in this document...................................................................................................... 3
1.2 General safety instructions ............................................................................................................ 4
1.3General standards to be respected................................................................................................. 5
2General description .....................................................................................................6
2.1 General recommendations............................................................................................................. 6
2.1.1 Handling....................................................................................................................................................... 6
2.1.2 Transportation ............................................................................................................................................. 6
2.1.3 Storage......................................................................................................................................................... 6
2.2 Technical considerations ................................................................................................................ 7
2.2.1 Static requirements on the roof ................................................................................................................... 7
2.2.2 Tilt angle ...................................................................................................................................................... 7
2.2.3 Wind and snow load .................................................................................................................................... 7
2.2.4 System location............................................................................................................................................ 7
2.2.5 Types of mounting ....................................................................................................................................... 8
2.2.6 Fire/explosion protection............................................................................................................................. 8
3Mechanical installation ...............................................................................................9
3.1 Installing DualSun modules ............................................................................................................ 9
3.2 Mounting specificities of DualSun Flash panel.............................................................................. 11
4Electrical installation .................................................................................................12
4.1 Electrical connection .................................................................................................................... 12
4.1.1 Serial wiring ............................................................................................................................................... 13
4.1.2 Parallel wiring ............................................................................................................................................ 13
4.2 Electrical fittings, cables and diodes............................................................................................. 14
4.3 Grounding and lightning protection ............................................................................................. 15
4.4 Indirect lightning strike ................................................................................................................ 16
5Cleaning the surface of the modules..........................................................................17
6Decommissioning the installation..............................................................................17
6.1 Disassembling a module............................................................................................................... 17
6.2 Waste treatment.......................................................................................................................... 17
7Responsibilities .........................................................................................................18
7.1 Warranty conditions .................................................................................................................... 18
7.2 Disclaimer .................................................................................................................................... 18

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1Introduction
1.1 Symbols used in this document
Important remark
Security note
Mandatory use of the safety harness during
any height intervention
Risk of electric shock
Use of protective goggles
Risk of falling
Mandatory use of safety shoes
Risk of falling objects
Mandatory use of gloves
High temperature risk
Mandatory use of helmet
Information, advice, recommendation, etc.
Switching off the electrical circuit upstream
and downstream of the inverter
String: single circuit of modules mounted in series.

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1.2 General safety instructions
Please read this installation manual thoroughly and in detail in order to be able to fully exploit the functionality of
the product. DualSun disclaims all liability for defects and damages resulting from failure to comply with the
installation instructions (improper use, incorrect installation, handling error, etc...).
•It is important to follow these instructions for the safety of people. Improper
assembly may cause serious injury. The end user must keep these safety instructions.
•For installations on roofs, it is necessary to respect the safety standards of the
persons, relating to roof work and sealing of roofs and relating to scaffolding work
with safety net by mounting the respective devices before starting the work. Refer
to the recommendation published by the national risk prevention organization.
•The use of gloves is mandatory when handling the panels to avoid any risk of injury
or burns.
•Installation, control, commissioning, maintenance and troubleshooting of the
system must only be carried out by qualified personnel.
•The correct operation of the installation is guaranteed only if the installation and
assembly have been made in the rules of art.
•Installation should not be used if there are signs of damage.
•Unplug all connecting cables from the power supply before intervening on the
installation.
•All electrical work must be carried out according to local directives.
•The entire solar installation must be mounted and operated in accordance with the
recognised technical rules.

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1.3 General standards to be respected
To ensure safe, ecological and economical operation, all applicable regional and national standards, rules and
directives must be met, particularly those mentioned below:
•IEC/EN 61215 1 and 2 Edition 1: qualification of design and approval of crystalline silicon photovoltaic (PV)
modules for terrestrial application
•IEC/EN 61730 1 and 2 Edition 2: qualification for the operating safety of photovoltaic modules (PV) –part 1:
requirements for construction and part 2: requirements for testing.
The installation and safety instructions must be met.
Comply with the regulations on the prevention of occupational accidents prescribed by professional associations, in
particular those relating to roof work.
The entire solar installation must be mounted and operated in accordance with the recognised technical rules.
All electrical work must be carried out according to local directives.

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2General description
2.1 General recommendations
2.1.1 Handling
DualSun modules must be handled like any glass product. To avoid accidents, injuries, or damage to the module during
work, the following precautions must always be followed:
•Do not walk on the modules.
•Do not drop anything on the modules.
•Protect modules from possible scratch on front and rear faces
•Do not exert any mechanical tension on the electrical connection.
•Always lift and transport the modules with both hands and never use the junction box as a carrying handle.
For the complete process of DualSun modules unconditioning and handling, see the DualSun file No. XX-04.
2.1.2 Transportation
In order not to damage the modules during transport, the following instructions must be followed:
•Transport stacked modules vertically, with a separator that supports the frame level of each module.
•Do not remove the original packaging until the time of installation.
•Do not apply mechanical pressure to the modules (for example, do not attach the modules using a strap, or
place any objects on the surface of the modules).
2.1.3 Storage
When storing, to avoid accidents or damaging the modules, the following instructions must be followed:
•Store the modules vertically.
•Do not store the modules on the edges, in a corner, or on an irregular surface.
•Do not place any objects on the surface of the modules.
•When choosing a suitable storage location, make sure that:
othe location is dry and cool,
oNo object can fall on the module and thus damage it.
If a DualSun module is damaged or broken, it is necessary to replace it. Never install a damaged
module.

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2.2 Technical considerations
Throughout the year, the system is exposed to external weather and natural conditions (Sun, wind, rain, hail, snow,
thunderstorms, dead leaves, dust, bird droppings, etc.) that influence the performance and lifespan of the modules.
To extend the life of the modules and to ensure that the installation is functioning properly, important factors and
adjustment parameters are to be considered:
2.2.1 Static requirements on the roof
The Solar Installer must ensure that the roof structure can carry the weight of the system.
2.2.2 Tilt angle
The optimal mounting position of DualSun solar panels results in a 90° incidence angle of sun rays relative to the
surface of the panels (i.e. Perpendicular to the panels). To maximize the productivity of the installation, panels should
be positioned at the optimum orientation and tilt angle. Those angles depend on the geographical location of the
installation and can be calculated by a qualified system designer. All panels in a string should, wherever possible, have
the same orientation and tilt angles to ensure the system does not underperform due to mismatched outputs.
2.2.3 Wind and snow load
The module has been tested up to a pressure of 5400 Pa in negative pressure (snow) and 2400 Pa in
positive pressure or negative (wind) without damage. It meets the requirements of the standard
IEC/EN 61215 for wind speeds up to 130 km/h.
2.2.4 System location
The overall output of the photovoltaic system in series is always limited by the module delivering the lowest power.
Different factors can influence the performance of a module (faults, shading, different orientations) and impact the
entire system.
Therefore, it is necessary to study the implantation to avoid a shading effect on the modules in series.
In addition, all panels must be mounted with the same orientation. It is advisable to align all modules to the South, to
achieve optimum performance.
DualSun suggests installing the modules in areas where temperatures range from-20 °c to + 50 °c, which corresponds
to the minimum and maximum monthly average temperatures, in compliance with IEC 60364-5-51. The extreme
operating temperatures of the modules are included between -40 °C and + 85 °C.
In areas with high snow conditions and exposed to strong winds, the assembly of the modules must be carried out in
such a way as to ensure sufficient nominal resistance and in accordance with local regulations.
130 km/h

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Some operating environments are not recommended for DualSun modules, and are excluded from the DualSun
limited warranty:
-No panel should be mounted on a site where it can be exposed to direct contact with saltwater, salt mist,
acid rain, active chemical vapours or any other aggressive environment.
-DualSun modules must not be installed near flammable liquids, gases, hazardous materials or any type of
vehicle.
-The maximum altitude the PV module is designed for ≤2000m
2.2.5 Types of mounting
The fastening of the modules must be secured by at least 4 points and spread according to the areas specified in the
diagram shown in chapter 3.2.
2.2.5.1 Integrated assembly
This assembly guarantees the retention of the original functionality of the roof. Special attention should be paid to
the insulation as well as to the protection against rain and humidity. To achieve this level of sealing, the module must
be mounted on a special frame that can route rainwater and withstand the wind and snow loads occurring in the
geographical area of the installation.
2.2.5.2 Over the roof assembly
The modules can be mounted on a frame designed to support
the photovoltaic panels. This framework must be able to
withstand the wind and snow loads occurring in the
geographical area of the installation. When fastening and
connecting the system to the building, it is necessary to avoid
damage or destruction of the roof covering in order to maintain
optimum resistance against rain and moisture.
The instructions given in the installation guide for the mounting system must be followed for
proper installation.
2.2.6 Fire/explosion protection
Do not install the DualSun modules in the vicinity of highly flammable gases, vapours, or dust (e.g., next to a gas station
or containers). The national and local fire prevention standards and regulations must be respected during installation.
For installations located on a roof, the modules must be mounted on a fire-resistant roofing cover adapted to the
application.
The DualSun modules have a class C fire resistance according to IEC/EN 61730-2.
Figure 1 : installation on K2 overlay system

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3Mechanical installation
The installation of DualSun panels must be managed and carried out by trained and qualified personnel.
The system must be assembled and operated according to the instructions provided, to comply with the
local and national health and safety, and risk prevention regulations.
When assembling and operating the system, no unauthorized person shall be located on or around the roof of the
facility.
3.1 Installing DualSun modules
The DualSun panels can be installed both in portrait and landscape orientation.
DualSun does not provide the mounting system for fastening the modules on the roof: please refer to the installation
instructions of the chosen mounting system, to install the modules whether for an integrated or for a superimposed
installation, in landscape or portrait.
The mounting system must have a flat surface for mounting the panel and must not cause twisting or stress on the
panel, even in case of thermal expansion.
We also remind that the sealing is not ensured by the panels but by the roof covering system and that the evacuation
of the water must be foreseen.
It is necessary to provide a space between the frame of the panels and the structure or the floor to avoid damage to
the cables.
The list of mounting systems compatible with DualSun modules is available in the “Mounting
systems compatibility" document on our website dedicated to professionals
Even when the solar radiation is low, the photovoltaic part of the system produces direct current
(DC). This DC current circulates from the module towards the inverter, do not manipulate the
module or the connections without protections.
The modules are class II qualified in compliance with IEC/EN 61215-2 and IEC/EN 61730-1
standards. These standards concern PV modules for use on buildings, or on ground structures.
DualSun panels also have the U.S. UL 1703 certificate
Artificially concentrated solar radiation should not be directed to the module.