Ground mount:

• Select the height of the mounting system to prevent the lowest edge of the module from being covered by snow for a long time in winter in areas that experience heavy snowfalls.
• In addition, assure the lowest portion of the module is placed high enough so that it is not shaded by plants or trees or damaged by sand and stone driven by wind.

Roof mount:

• When installing a module on a roof or building, ensure that it is securely fastened and cannot fall as a result of wind or snow loads.
• Provide adequate ventilation under a module for cooling (10cm minimum air space between module and mounting surface).
• When installing module on a roof, ensure that the roof construction is suitable. In addition, any roof penetration required to mount the module must be properly sealed to prevent leaks.
• In some cases, a special support frame may be necessary.
• The roof installation of solar modules may affect the fireproofing of the house construction.
• The modules are rated fire Class C, and are suitable for mounting over a class A roof. Do not install modules on a roof or building during strong winds in case of accidents.

Pole mount:

• When installing a module on a pole, choose a pole and module mounting structure that will withstand anticipated winds for the area.

General installation:

• Module mounting must use the pre-drilled mounting holes in the frame.
• The most common mounting is achieved by mounting the module using the four symmetry points close to the inner side on module frames.
• If excessive wind or snow loads are expected, all eight mounting holes must be used
• Do not lift the module by grasping the module’s junction box or electrical leads.
• Do not stand or step on module.
• Do not drop module or allow objects to fall on module.
• To avoid glass breakage, do not place any heavy objects on the module.
• Do not set the module down hard on any surface.
• Inappropriate transport and installation may break module.

Sadoun Solar Panels This guide describes some of Grid-connected electrical

• The DC electrical energy generated by photovoltaic systems may also be converted to AC and connected to a utility grid system. As local utilities’ policies on connecting renewable energy systems to their grids vary from region to region.
• Consult a qualified system designer or integrator to design such a system. Permits are normally required for installing such a system and the utility must formally approve and inspect such a system before it can be accepted.

Grounding

• The module frame must be properly grounded. The grounding wire must be properly fastened to the module frame to assure good electrical contact. Use the recommended type, or an equivalent, connector for this wire.
• If the support frame is made of metal, the surface of the frame must be electroplated and have excellent conductivity.
• We recommend the lay-in lug(Cat. No. GBL4-DBT,rated for 600Volts,company:ILSCO,UL number is E34440) when grounding.First strip 16mm insulating jacket from the end of the ground wire carefully to avoid nicking or cutting conductors, insert the wire to the feet of the lug (see the picture), and screw down the slotted screw. Be careful not to damage the wire core. And then tighten up the screw.
• Next, assemble the recommended ILSCO grounding lug to the aluminum frame using stainless steel M3 or M5 screw and hardware as shown below. Note: there are two different size grounding holes, the smaller of which is being phased out.
• Further, buildup of hardware for mounting the grounding lug are the same—except for the M3 screw, an added flat washer is mounted directly under the M3 screw head. The star washer is fitted directly under the grounding lug and makes electrical contact by penetrating the anodized coating of the aluminum frame, The screw assembly is further fitted with a flat washer, then a split lock washer and finally a nut to secure the entire assembly, as shown. Recommended torque of M3 or M5 screw assembly is 0.8NM or 1.5 NM.

General Electrical

• Do not use modules of different configurations in the same system. The max. number of module (N) = Vmax system / [Voc(at STC)].
• Several modules are connected in series and then in parallel to form a PV array, especially for application with a high operation voltage. If modules are connected in series, the total voltage is equal to the sum of individual voltages.
• For applications requiring high currents, several photovoltaic modules can be connected in parallel; the total current is equal to the sum of individual currents.
• Module is supplied with connectors to use for system electrical connections.
• Consult rated local wiring regulations to determine system wire size, type, and temperature.
• The cross section area of cable and the capacity of connector must be selected to suit the maximum system short circuit current
• (Recommended cross section area of cable is 12AWG for a single module and rated current of a connector is larger than 10A ), otherwise the cable and connector will be overheated under large current. Please note that the upper limit temperature of cable is ≥85℃,and the connector is ≥105℃.
• The junction box has a breather port. The breather port must be mounted facing down and can not be exposed to rain. Therefore, the junction box must be on the higher side of the module when it is mounted.

Solar Panels Commission and Maintenance

Blocking diodes and bypass diode

• Blocking diodes prevent current flowing from the battery to the module when no electricity is being generated. It is recommended to use blocking diodes when a charging regulator is not used. Your specialist dealer can advise you the suitable types.
• In systems with more than two modules in series, high reverse current can flow through cells that are shaded partially or outright when part of a module is shaded and the rest is exposed to the sun. These currents can cause the affected cells to get very hot and could even damage the module. To protect module from such high reverse currents, by-pass diodes are used in module. All modules rated greater then 55 Watt have bypass diode already integrated in the junction box. In the unlikely event of diode failure, a replacement can easily be made.
• Protect yourself from electricity shocks while debugging or maintaining the solar power system.

Testing, commissioning and

• Test all electrical and electronic components of the system before using it. Follow the instructions in the guides supplied with the components and equipment.
• Testing modules connected in series before they are connected to system.
• Check the open-circuit voltage of every series module by a digital multimeter (fluke 170 series are recommended). The measured values should correspond to the sum of the open-circuit voltage of the individual module. You will find the rated voltage in the technical specifications of the type of the module used. If the measured value is significantly lower than the expected value, please proceed as described under “Troubleshooting an excessively low voltage”.
• Check the short-circuit current of every series circuit. It can be measured directly by a digital multimeter (Fluke 170 series are recommended) connected in the two terminals of series circuit or module, or with any load such as PV illumination to make a rough measurement. Attention, the rated scale of the ammeter or the rated current of load should more than 1.25 times of the rated short-circuit current of series module. You will find the rated current in the technical specifications of the type of module used. The measured value can vary significantly, depending on weather conditions, the time of day and shading of the module.

Troubleshooting low

• Identify the commonly low voltage and excessively low voltage. Commonly the low voltage mentioned here is the decrease of open-circuit voltage of the module, which is caused by the temperature rising of solar cells or lower irradiance. Excessively low voltage is typically caused by improper connections at the terminals or defective bypass diodes.
• First, check all wiring connections to make sure it is not open-circuit or is not connection well.
• Check the open-circuit voltage of each module:
• Fully cover the modules with an opaque material.
• Disconnect the wiring at both terminals of the modules.
• Remove the opaque material from the module to be checked and measure the open-circuit voltage at its terminals.
• If the measured voltage is only half of the rated, this indicates a defective bypass diode. Refer to ‘Testing and replacing bypass diodes’.
• In the case of not very low irradiance, if the voltage across the terminals differs from the rated value by more than 5 percent, this indicates a bad electrical connection.

Maintenance

• The following maintenance is recommended in order to ensure optimum performance of the module:
• Clean the glass surface of the module as necessary. Always use water and a soft sponge or cloth for cleaning. A mild, non-abrasive cleaning agent can be used to remove stubborn dirt.
• Check the electrical and mechanical connections every six months to verify that they are clean, secure and undamaged.
• If any problem arises, have them investigated by a competent specialist. Attention, observe the maintenance instructions for all components used in the system, such as support frames, charging regulators, inverters, batteries etc.

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