INSTALLATION GUIDE FOR PHOTOVOLTAIC (PV) MODULES Version 1.
Contents Purpose of this Guide Disclaimer of Liability 02 General Safety 02 Safety Precaution Measures 03 Product Identification 04 Installation Considerations 05 Unpacking and Storing 05 Pre-Installation Requirements 05 Site Considerations 06 Module Mounting 07 Fastening 07 Top Down Clamps 08 Grounding 09 Module Dimensions 10 Electrical Installation 12 Electrical Specifications 12 Cables and Wiring 13 Bypass Diodes 14 General Installation 15 Grid Connected Electrical Sy
Purpose of this Guide This guide contains information regarding the installation for solar modules. All instructions should be read and understood before attempting to install. If there are any questions, please contact us for further explanation. The installer should conform to all the safety precautions listed in this guide when installing the module. Local codes should also be followed in such installations.
Solar modules change light energy to direct-current electrical energy. They are designed for outdoor use. Modules may be ground mounted, mounted on roof, vehicles or boats. Proper design of support structures is the responsibility of the system designer and installer. Do not attempt to disassemble the module, and do not remove any attached nameplates or components. Do not apply paint or adhesive to the module top surface. Do not use artificially concentrated sunlight directly on the module.
Product Identification Renogy modules have been qualified for Application Class A. Modules qualified for safety through IEC 61140 and within this application class are considered to meet the requirements for Safety Class II. Modules rated under this class should be used in systems operating at a voltage above 50 VDC or power above 240 W, where general contact access is anticipated.
Installation Considerations Before installing, obtain information about any requirements and pre-approvals for the site, installation, and inspection from the relevant authorities. Check applicable building codes and ensure that the structure can bear the module system load Ensure the supporting roof has fire resistant roof covering Renogy modules are listed as Class C under the UL790 Standard.
A maximum of two strings can be connected in parallel without needing to incorporate an over-current protection device. Only modules with similar electrical output should be connected in the same string to avoid mismatch effects. The small drainage holes on the underside of the module must not be blocked. Avoid shading—even minor partial shading reduces yields. Sunlight should be able to reach the module even on the shortest day of the year. Shading can affect module service life.
Installation Considerations All installation methods herein are only for reference and Renogy will not provide their own mounting components. Instead, the system installer is responsible for making sure installation is abided by all codes. Module mounting must use the pre-drilled mounting holes (Length * Width: 14mm x 9mm) in the frame. The most common mounting is achieved by mounting the module using the four symmetry points close to the inner side of the module frame.
Use appropriate corrosion-proof fastening materials—should be stainless steel Do NOT drill holes or modify the module frame as it will void warranty. Each module must be securely fastened at a minimum of 4 points on two opposite sides. *Actual bolt depends on the railing and professional installer. Design load and safety factors will be determined by racking suppliers or professional engineers. Top Down Clamps Clamps are an approved method of mounting for Renogy modules. A clamp holds two modules in a row.
Grounding The frame of the PV module, as well as any exposed non-current carrying metal parts of fixed equipment that can be energized must be grounded to avoid electrical shock. Renogy recommends grounding all PV module frames to ensure the voltage between the conductive equipment and the earth ground is zero in all circumstances. Appropriate grounding consists of using an appropriately sized EGC or racking system that can be used for integrated grounding.
Module Dimensions The modules will be mounted using the mounting holes (on the short side of the aluminum frame), closest to the edges. 668mm [26.3 in] 35mm [1.38 in] 509mm [20.0in] 35mm [1.38in] 70mm 70mm [2.76in][2.76in] 140mm [5.51 in] 39mm 50mm [1.54 in][1.97 in] 50mm [1.97 in] 39mm 50mm [1.54in] [1.97in] 39mm [1.54 in] 300mm [11.8 in] 50mm [1.97in] 39mm [1.54in] 14*9mm [0.35in] 14*9mm [0.35 in] 200mm [7.87in] 35mm [1.38 in] 35mm [1.38in] 700mm [27.6 in] 600mm [23.6in] 2.0mm [0.
RNG-270P 35 mm [1.4 in] 1002 mm [39.4 in] 55 mm [2.2 in] 6 mm [0.24 in] Grounding 14.5*6.5mm [0.57*0.26 in] 13 mm [0.5 in] 35 mm [1.4 in] 900 mm [35.4 in] 992 mm [39.1 in] 958 mm [37.7 in] RNG-320D 11 1665 mm [65.
Electrical Installation Electrical Specifications The electrical characteristics are within ±10 percent of the indicated values of Isc, Voc, and Pmax under Standard Test Conditions (STC Irradiance of 100mW/cm2, AM 1.5 spectrum, and a cell temperature of 25°C (77°F)) Under normal conditions, a photovoltaic module is likely to experience more current and/or voltage than its Standard Test Conditions rated output.
Cables and Wiring Renogy modules are equipped with two (2) stranded, PV-rated, output solar connector cables. The positive connector is a male connector and the negative connector is a female connector. These wires by themselves are rated for series connections, but could be adapted to hold parallel connections with an extra component such as a combiner box or a solar connector adaptor for parallel strings.
Portrait Orientation Landscape Orientation Series Connections are just plug and play with the male and female solar connectors Parallel connections will utilize solar Y branch connectors for centralizing all positive and all negative connections. Bypass Diodes The junction boxes used with the Renogy modules contain bypass diodes that are wired in parallel with the PV string cells.
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. All modules rated greater than 55 Watt have bypass diodes already integrated in the junction box.
Commission and Maintenance Renogy recommends that all work in commissioning and maintenance of a system must be performed by a qualified solar PV technician! Testing, Commissioning, and Troubleshooting Test all electrical and electronic components of your system before commissioning it. Follow the instructions in the guides supplied with the components and equipment. Testing modules connected in series before they are connected to the system.
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 Renogy recommends the following maintenance in order to ensure optimum performance of the module: Clean the glass surface of the module as necessary.
Replace a defective diode with a diode of the same type, and ensure that its polarity making is oriented the same way as the original diode. Finally, check the open-circuit voltage (Voc) of the module, as described previously, and replace both covers.
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