Renogy Installation Guide for Photovoltaic (PV) Modules and Mounting Accessories

1. Purpose of this Guide

This guide provides essential information for the installation of solar modules and mounting accessories. All instructions must be read and understood before attempting installation. Contact Renogy for further explanation if needed. Installers must adhere to all safety precautions, local codes, and become familiar with mechanical and electrical requirements. Keep this guide for future reference.

This document is applicable to the following solar module series:

• RNG-300D; RNG-160D-SS; RNG-100D; RNG-100D-SS; RNG-100MB; RNG-100D-R; RNG-100D-R-BK; RNG-80D-SS; RNG-50D; RNG-30D; RNG-30D-SS; RNG-20D; RNG-10D; RNG-10D-SS
• RNG-270P; RNG-160P; RNG-100P; RNG-50P

1.1. Disclaimer of Liability

Renogy disclaims liability for loss, damage, or expense arising from installation, operation, use, or maintenance beyond its control. No responsibility is assumed for infringement of third-party patents. Information provided is based on Renogy's knowledge and experience and does not constitute a warranty. Renogy reserves the right to change manual content without prior notice.

1.2 General Safety

Installation requires specialized skills and should only be performed by qualified personnel. Modules have attached junction boxes and #12 AWG wires. Installers assume all risks, including electric shock. Individual modules can generate DC voltages over 30V when exposed to sunlight, which is potentially hazardous. Disconnecting wires in sunlight may create electric arcs, causing burns or fires. Be extremely careful.

Solar modules convert light to DC electricity and are designed for outdoor use on roofs, vehicles, or boats. Proper design of support structures is the installer's responsibility.

• Do not disassemble modules or remove nameplates.
• Do not apply paint or adhesive to the module's top surface.
• Do not use artificially concentrated sunlight on modules.
• Abide by all local, regional, and national statutory regulations, including building permits.

1.3 Safety Precaution Measures

Modules produce electrical energy when exposed to light. DC voltage can exceed 30V; series connections sum voltages, parallel connections sum currents.

• Keep children away during installation.
• Completely cover modules with opaque material to prevent electricity generation during installation.
• Do not wear metallic jewelry or accessories while working on the system.
• Use only insulated tools approved for electrical installations.
• Abide by safety regulations for all system components (wiring, connectors, regulators, inverters, batteries, etc.).
• Use only equipment, connectors, wiring, and support frames suitable for solar electric systems. Always use the same module type within a system.

Module performance under normal outdoor conditions may differ from datasheet values (expected at standard test conditions).

2. Product Identification

Renogy modules are qualified for Application Class A and Safety Class II (IEC 61140), suitable for systems over 50 VDC or 240W where general contact access is anticipated. Systems using UL1703 certified modules and UL2703 certified mounting systems must be evaluated against roof covering fire classification standards (UL1703, UL790).

Modules are certified as Type 1 for fire performance. System fire class rating is valid only when mounted as specified and over a fire-resistant roof covering.

Each module has three rear labels:

• Nameplate: Product type, rated power, current, voltage, open circuit voltage, short circuit current, weight, dimensions (under standard test conditions).
• Barcode: Unique serial number. Do not remove any label, as it voids the warranty.

A sample nameplate for RNG-100D-SS is provided, listing specifications like Max Power (100W), Open-Circuit Voltage (21.6V), Optimum Operating Voltage (17.9V), Optimum Operating Current (5.72A), Short-Circuit Current (6.24A), Temp Coefficients, Max System Voltage (600VDC UL), Max Series Fuse Rating (15A), Fire Rating (Class C), Weight (6.5kg), Dimensions (1074x498x35mm). It also includes warnings about DC voltages and electrical safety.

3. Installation Considerations

Before installation, obtain site-specific requirements and pre-approvals from authorities. Ensure the structure can bear the module load and the roof has fire-resistant covering. Renogy modules are listed as Class C under UL790.

3.1 Unpacking and Storing

Unpack module pallets carefully. Avoid stepping, walking, standing, or jumping on modules, as this can cause micro-cracks. Do not carry modules on your head or by the wires/junction box. Avoid sharp instruments on modules. Keep electrical contacts clean and dry.

3.2 Pre-Installation Requirements

Ensure modules meet general system requirements and that other components do not cause mechanical or electrical damage. Modules can be wired in series (voltage increases) or parallel (current increases). Series connections link positive to negative; parallel connections link positive to positive and negative to negative. Bypass diodes are model-dependent. Do not exceed maximum system voltage. A maximum of two strings can be paralleled without over-current protection. Use modules with similar electrical output in the same string to avoid mismatch. Keep drainage holes unblocked. Avoid shading, as it reduces yield and can affect service life.

3.3 Site Considerations

Install modules in locations meeting these requirements:

• Operating Temperature: -40°F to 194°F
• Relative Humidity: 45% to 95%
• Avoid trees, buildings, or obstructions.

Renogy modules are designed with a mechanical load strength of 2400Pa.

3.4 System Fire Rating

The fire rating is valid only when mounted as specified, over a fire-resistant roof covering. Modules are certified as Type 1 for fire performance. To preserve the rating, PV modules must be mounted on a non-combustible surface with a standoff height of at least 5 inches and 0° inclination.

4. Module Mounting

Renogy does not provide mounting components; the system installer is responsible for compliance with all codes. Mounting system limitations must be specified in instructions and certifications. Maintain a distance of at least 5 inches between the PV module's front glass and the roof surface.

Module mounting uses pre-drilled holes (14mm x 9mm) on the frame. The most common method uses four symmetry points near the inner side of the frame. Holes in the center are for grounding. Modules must be securely fixed to bear expected loads (wind, snow). A minimum clearance of 0.25 in (6.5mm) or more between modules is required for thermal expansion.

Diagram showing module mounting holes on the frame, labeled 'Mounting Holes (Length * Width): 14mm x 9mm'. Detail A shows dimensions of the mounting hole area.

4.1 Bolting

Use M6 or M8 stainless steel bolts, nuts, and washers on the rear side of the long frame parts. Refer to the racking manufacturer for specific torque requirements. The mounting design must be certified by a registered professional engineer and comply with local codes. Use corrosion-proof fastening materials. Do NOT drill holes or modify the module frame, as this voids the warranty. Each module must be securely fastened at a minimum of 4 points on two opposite sides. Design load and safety factors are determined by racking suppliers or professional engineers.

4.2 Top Down Clamps

Clamps are an approved mounting method. A clamp holds two modules in a row. The centerline of the clamps must align with the module mounting holes.

4.3 Grounding

The PV module frame and any exposed non-current carrying metal parts must be grounded to prevent electrical shock. Renogy recommends grounding all frames to ensure zero voltage between conductive equipment and earth ground. Use an appropriately sized EGC or integrated racking system. Renogy panels have coated aluminum frames. Frame rails have pre-drilled grounding holes. Do not drill additional holes.

A stainless steel washer is used between the grounding wire and the module frame to prevent corrosion. The module frame must be properly grounded per NEC clause 250. Use the recommended connector type. If the support frame is metal, its surface must be electroplated and highly conductive.

Recommended grounding lug: ILSCO GBL4-DBT (600V). Strip 16mm of insulation from the ground wire (4-14 STR.), insert into the lug, and screw down. Assemble the lug to the aluminum frame using stainless steel M3 or M5 screw and hardware. A star washer is fitted directly under the grounding lug to penetrate the anodized coating for electrical contact. Recommended torque for M3 or M5 screw assembly is 0.8NM or 1.5 NM.

Diagram illustrating grounding connection points on the module frame and support structure, including M3 nut, spring washer, star washer, cable, and grounding hole.

5. Electrical Installation

5.1 Cables and Wiring

Renogy modules are equipped with two PV-rated, stranded MC4 cables: a male positive connector and a female negative connector. These are rated for series connections but can be adapted for parallel strings using a combiner box or MC4 adaptor. Sunlight resistant cables are recommended, with a minimum wire size of 4mm².

MC4 cables comply with the Standard for Connectors for use in Photovoltaic Systems, UL 6703. Keep connectors dry, clean, and tightly sealed. Faulty connections can cause electrical shock. Ensure all connections are secure.

Renogy modules can be installed in landscape or portrait orientation. Ensure proper distance between panels and surfaces for air circulation.

Diagrams showing Portrait Orientation and Landscape Orientation for module installation.

Series connections use plug-and-play male and female MC4 connectors. Parallel connections utilize MC4 branch connectors.

Appropriate MC4 connectors will have a manufacturer name such as Renogy or Forward Electronics. Compatible manufacturers include Multi-Contact (e.g., KBT4/6I-UR, KST4/6II-UR). Connector markings include company name, do not disconnect symbol, TUV certification, and polarity band.

5.2 Bypass Diodes

Junction boxes contain bypass diodes wired in parallel with PV string cells. They activate during partial shading to bypass current from non-shaded cells, limiting module heating and performance losses. They do not protect against over-current. Over-current protection devices are required for more than 2 modules in series. If bypass diodes are suspected of failure, contact Renogy. Bypass diode rating: SPA2040 (Tj Max = 200°C, if 20A). High reverse current in shaded cells can cause overheating and damage. Modules rated over 55 Watt have integrated bypass diodes. Qualified technicians should replace failed diodes.

5.3 General Installation

Modules use PV wiring connectors complying with UL 6703. Do not use modules of different configurations in the same system. Series connections increase voltage; parallel connections increase current. Use National Electric Code (NEC clause 310) for system wiring size (#12 AWG minimum, 90°C temperature rating). Canadian installations must comply with CSA C22.1. Cable and connector capacity must suit maximum short circuit current to prevent overheating. Use DC fuses for module overcurrent protection.

5.4 Grid Connected Electrical System

DC energy can be converted to AC and connected to a utility grid. Consult a qualified system designer or integrator, as utility policies vary. Permits are normally required, and the utility must approve and inspect the system.

6. Commission and Maintenance

Commissioning and maintenance must be performed by a qualified solar PV technician.

6.1 Testing, Commissioning, and Troubleshooting

Test all electrical components before commissioning. Test modules in series before connecting to the system. To determine Voc and Isc, modules must be exposed to sun and not connected to a load. Observe safety precautions.

Check the open-circuit voltage (Voc) of each series module using a digital multimeter. The measured system Voc should equal the sum of individual module Vocs. If the measured value is significantly lower than expected, troubleshoot as described under 'Troubleshooting an excessively low voltage'.

Determine the short-circuit current (Isc) of each series circuit by connecting the multimeter directly. The ammeter's rated scale must be at least 1.25 times the rated short-circuit current. Measured values vary with weather and time of day.

Low voltage can be caused by temperature rise, low irradiance, improper connections, or defective bypass diodes. Troubleshooting steps:

• Check all wiring connections for continuity.
• Check open-circuit voltage of each module: Cover module, disconnect wiring, remove cover, measure voltage. If measured voltage is half the rated value, a bypass diode may be defective.

If voltage differs from the rated value by more than 5% (under not very low irradiance), it indicates a bad electrical connection.

6.2 Maintenance

To ensure optimum performance:

• Clean module glass with water and a soft sponge/cloth; use a mild, non-abrasive cleaner for stubborn dirt.
• Check electrical and mechanical connections every six months for cleanliness, security, and damage.
• Consult a specialist for any problems and follow maintenance instructions for all system components.

6.3 Replacing Bypass Diodes

This procedure should only be done by a competent PV technician after the module is disconnected. Place the module face down on a soft surface. Insert a 3mm flat screwdriver into the junction box cover slots and gently pull up to open. Insert the screwdriver alongside the diode and pry gently to remove the lead. Repeat for the other lead. Note the diode's polarity markings.

Check diode resistance with a multimeter's ohms scale: low resistance in one direction, high in the other indicates a good diode. Low resistance in both directions means it's shorted; high resistance in both means it's open. Replace defective diodes with the same type, ensuring correct polarity. Finally, check the module's open-circuit voltage (Voc) and replace covers.

Renogy MTS-CB Corner Bracket Mount

The Renogy Corner Bracket Mount (MTS-CB) is designed for virtually any aluminum-framed solar panels, providing drill-free and secure mounting to flat surfaces. It raises the panel to create an air gap for improved performance and acts as a wind deflector. Installation is cleaner and more flexible for motorhomes, caravans, and boats.

Key Features

• Non-corrosive, long-lasting, high-quality ABS plastic construction.
• 100% recyclable and UV resistant.
• Drill-free mounting.
• Designated for virtually any aluminum-framed solar panels.
• Best suitable for flat roofs of smooth aluminum, wood, or GRP material.
• Easier and more flexible installation.
• Compatible with all Renogy solar panels (excluding solar suitcase models).

Identification of Components

Diagrams of the Renogy Corner Bracket and Side Bracket components.

Installation (MTS-CB)

NOTE: These instructions are a guideline. Actual installations may vary with adhesive type or roof type. Consult your adhesive manufacturer for proper instructions for ABS plastic to your specific roof material.

Recommended tools: Assembly Adhesive (Sikaflex-252), Caulking gun, Masking Tape, Hand Pads (Scotchbrite Pads), Spirit Level, Tape Measure.

WARNING: Assembly adhesives contain hazardous chemicals that can be detrimental to one's health. Make sure to abide by the manufacturer's handling and care when using assembly adhesives.

1. Mate Corner Brackets to Solar Panel

1. Apply adhesive to the top side of the corner bracket where the panel will be installed.
2. Match the corner bracket to the solar panel corner.
3. Apply pressure to ensure proper contact.
4. Repeat for the other 3 corner brackets.

NOTE: Adhere to adhesive manufacturer specifications for application and time to dry.

Diagram showing a solar panel corner with a corner bracket being attached. Illustrations showing the placement of corner brackets on a solar panel.

2. Mate Side Bracket to Solar Panel

1. Apply adhesive to the top side of the side bracket where the panel will be installed.
2. Place the side bracket to the solar panel side. Adjust for symmetry as needed.
3. Apply pressure to ensure proper contact.
4. Repeat for the other side.

NOTE: Adhere to adhesive manufacturer specifications for application and time to dry.

Diagram showing a solar panel with side brackets being attached.

3. Apply Adhesive to the brackets and install on flat surface

NOTE: Always mark out where the solar panel will be located on the flat surface before proceeding to apply adhesive.

NOTE: Ensure the proper solar panel orientation so that the wires are coming out of the user desired side.

1. Clean the surface of the brackets and of the flat surface to ensure maximum bonding potential.
2. Apply adhesive to the bottom side of all the brackets where they will make contact with the flat mounting surface.
3. Apply pressure to ensure proper contact.

NOTE: Adhere to adhesive manufacturer specifications for application and time to dry.

Illustration showing the placement of side brackets on a solar panel, and then the panel with all brackets attached, ready for mounting on a surface.

Technical Specifications (MTS-CB)

Compatibility

The MTS-CB mounts are compatible with all Renogy solar panels excluding the solar suitcase models.

Dimensions

Note: The following drawings utilize inches as their dimension units.

Side Bracket

Diagram of the Side Bracket with dimensions labeled in inches.

Corner Bracket

Diagram of the Corner Bracket with dimensions labeled in inches.

Renogy reserves the right to change the contents of this manual without notice. Revision: 9/13/2017