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SolarEdge SE27.6K User Manual

SolarEdge SE27.6K
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Installation Guide
SolarEdge System
Installation Guide
For Europe and APAC
Version 4.1

Table of Contents

Questions and Answers:

SolarEdge SE27.6K Specifications

General IconGeneral
BrandSolarEdge
ModelSE27.6K
CategoryInverter
LanguageEnglish

Summary

Handling and Safety Instructions

Safety Symbols Information

Explanation of WARNING, CAUTION, NOTE, and IMPORTANT SAFETY FEATURE symbols.

Important Safety Instructions

Core Safety Warnings

Critical safety warnings for inverter cover, grounding, personnel, and PV panels.

SafeDC Voltage Compliance

IEC60947-3 compliance for SafeDC voltage, including worst-case calculations.

Handling and Operation Precautions

Cautions for handling heavy objects and operating the unit per specifications.

General Safety Notes and Warnings

Inverter Warning Labels

Explanation of warning symbols appearing on the inverter warning label.

Chapter 1: Introducing the SolarEdge Power Harvesting System

Power Optimizer Functionality

Describes power optimizers for DC-DC conversion, MPPT, and safety voltage.

Inverter and System Components

Chapter 2: Installing the Power Optimizers

Power Optimizer Safety Precautions

Warnings about water, electrical disconnects, and connector compatibility.

Connector Compatibility Assurance

Ensuring mechanical compatibility of module and optimizer connectors.

Optimizer Safety Voltage Feature

Optimizers carry low voltage before inverter ON, ensuring safety.

Step 1: Mounting the Power Optimizers

Optimizer Mounting Location and Sunlight Protection

Determine location, use brackets, and recommend protection from direct sunlight.

Drilling Precautions and Torque

Warning against drilling vibrations; use torque wrench and avoid impact drivers.

Step 2: Connecting a PV Module to a Power Optimizer

Module-to-Optimizer Connection

Connecting module positive output to optimizer positive input, and negative to negative.

Step 3: Connecting Power Optimizers in Strings

Sealing Unused Optimizer Inputs

Warning to seal unused dual-input connectors with provided seals.

Step 4: Verifying Proper Power Optimizer Connection

String Voltage and Polarity Verification

Measure string voltage (1V per optimizer) and verify polarity with a voltmeter.

Chapter 3: Installing the Inverter

Inverter Connector Handling Caution

Caution not to rest inverter connectors on the ground to prevent damage.

Inverter Interfaces

Inverter Status Indicators

WARNING! - Rapid Shutdown Safety

Safety for PVRSS inverters regarding cover opening after power is off.

Mounting the Inverter

Handling Heavy Objects and Environmental Distance

Cautions for lifting and proximity to saline environments.

Mounting the Inverter (cont.)

Mounting the Inverter (cont.)

Chapter 4: Connecting the AC and the Strings to the Inverter

Connecting the AC Grid to the Inverter

Safety Cautions for Cover Removal and AC Connection

Safety warnings during cover removal and AC terminal connection.

Connecting the AC Grid to the Inverter (cont.)

AC Wiring Connections and Terminal Blocks

Connecting PE, L1, L2, L3, N wires to inverter terminal blocks.

Connecting the Strings to the Inverter

Parallel String Connections and DC Earthing

Using combiner boxes, prohibiting DC earthing, and connecting DC connectors.

Internal Residual Current Device (RCD)

Protection against electrocution and fire hazards using the internal RCD.

Selecting a Residual Current Device (RCD)

External RCD Requirements and Nuisance Tripping Avoidance

RCD selection based on codes and steps to avoid nuisance trips.

Chapter 5: Commissioning the Installation

Step 1: Activating the System

Steps to activate the system: verify switches, remove cover, insert card.

WARNING! - Electrical Shock Hazard

Caution about touching uninsulated wires when the inverter cover is removed.

Step 1: Activating the System (cont.)

Activation Card Verification and Insertion

Check card S/N matches inverter S/N and insert card into communication board.

AC Switch ON and Activation Success

Turn AC switch ON and check LCD for 'Running Script... Done!' message.

Troubleshooting Activation Failure

Steps for reset or manual activation if activation fails.

Step 1: Activating the System (cont.)

Step 2: Pairing Power Optimizers to the Inverter

Pairing Process Overview and Initiation

Pairing is mandatory for optimizers to produce power; initiated by holding LCD button.

Turning Inverter ON/OFF Switch for Pairing

Turn ON/OFF switch within 5 seconds to perform pairing.

Pairing Completion and System Startup

Success message ('Pairing Completed') and inverter entering Wakeup mode.

WARNING! - DC Cable Voltage During Pairing

Warning about high voltage on DC cables when inverter is ON.

Step 2: Pairing Power Optimizers to the Inverter (cont.)

Wakeup Mode Status and Countdown

Inverter monitors grid during Wakeup mode, displaying 'Waking Up...' and remaining time.

Step 3: Verifying Proper Activation

Verifying Initial and Main Inverter Status Screens

Check LEDs, P_OK, S_OK, Vac, Vdc, and Pac values for correct activation.

Chapter 6: User Interface

User Interface Configuration Modes

Inverter Configuration – Setup Mode

Configuration Methods and Entering Setup Mode

Accessing setup mode using internal/external buttons.

WARNING! - DC Voltage Safety During Setup

Warning message if DC voltage is not safe (<50V) during setup access.

Inverter Configuration – Setup Mode (cont.)

Status Screens - Operational Mode

Status Screens - Operational Mode (cont.)

Chapter 7: Setting Up Communication

CAUTION! - Connecting Communication Cables

Safety precautions when connecting cables, ensuring switches are OFF.

Communication Options (cont.)

Communication Connectors

Removing the Inverter Cover

WARNING! - DC Voltage Safety During Cover Removal

Warning if DC voltage is not safe (<50V) during cover removal.

CAUTION! - Internal Component Damage

Caution not to damage internal components during cover removal.

Creating an Ethernet (LAN) Connection

Connecting the Ethernet Cable

Steps to connect Ethernet cable: open gland, insert cable through fitting.

CAUTION! - Waterproof Fitting

Caution about the gland's waterproof fitting for ensuring proper sealing.

Creating an Ethernet (LAN) Connection (cont.)

Creating an RS485 Bus Connection

RS485 Bus Configuration

RS485 for bus of up to 31 slave and 1 master inverters.

Creating an RS485 Bus Connection (cont.)

Connecting the RS485 Communication Bus

Steps to remove cover, open gland #2, and pull out RS485 terminal block connector.

NOTE - Wire Cross-Connection Warning

Note not to cross-connect B, A, and G wires.

Connecting RS485 Bus Pins

Connecting B, A, and G pins in all inverters for RS485 bus creation.

RS485 Termination Switch

Terminating first/last devices by switching DIP-switch to ON.

Creating an RS485 Bus Connection (cont.)

NOTE - Termination Switch Position

Note that only first/last devices should be terminated; others OFF.

Connecting to Monitoring Platform

Designate master inverter and connect via LAN, ZigBee, or cellular.

Verifying the Connection

Master Inverter Configuration

Setting inverter as master using Communication, Server, RS485-Conf menus.

Automatic Slave Detection

System detects slaves; verify number of slaves reported.

Verifying Master Connection to Platform

Steps to check if master connection to monitoring platform is successful.

Verifying the Connection (cont.)

S_OK Indicator for Successful Connection

S_OK indicates successful connection to the monitoring platform.

Appendix A: Errors and Troubleshooting

Troubleshooting Communication

Guide for troubleshooting communication issues.

Troubleshooting Ethernet Communication

Identifying Ethernet communication errors using the Server Communication Status window.

Ethernet Error Messages and Causes

Table of Ethernet errors, causes, and troubleshooting steps.

Errors and Troubleshooting (cont.)

Missing Slaves Troubleshooting

Methods to identify missing slaves and troubleshoot connectivity using Long slave Detect and Slave List.

Power Optimizer Troubleshooting

Identifying Unreported Optimizers

How to identify un-paired or un-reporting optimizers via the LCD screen.

Pairing Failed Troubleshooting

Causes and solutions for pairing failures, including shading and remote retry.

String Voltage is 0V Troubleshooting

Causes and solutions for zero string voltage, like disconnected outputs or incorrect connections.

String Voltage Lower Than Expected

Troubleshooting for string voltage lower than expected, including connection and polarity checks.

Power Optimizer Troubleshooting (cont.)

String Voltage Higher Than Expected

Troubleshooting for high string voltage, including checking for extra optimizers or malfunctions.

WARNING! - High Voltage Deviation

Warning about high voltage deviation potentially indicating a lack of safe low voltage.

Locating Malfunctioning Optimizer

Steps to disconnect wires, measure output voltage, and locate faulty optimizer.

Connecting the AC Grid to the Inverter (cont.)

Connecting AC Wires to Inverter Terminals

Connecting AC wires (N, L1, L2, L3) to appropriate inverter terminal blocks.

Grid Line Connection Order Importance

Note on phase difference for power control and avoiding errors.

Connecting the Strings to the DC Safety Unit

Appendix D: SafeDC™

SafeDC Operation when AC is Off

DC voltage drops to 1V per optimizer when AC supply is off or ON/OFF switch is OFF.

SafeDC Disconnection Mechanism

Describes how the disconnection mechanism operates when AC supply is interrupted.

WARNING! - SafeDC Voltage Compliance

SafeDC complies with IEC60947-3 for worst-case SafeDC voltage < 120V.

Appendix E: External Fan Maintenance and Replacement

External Fan Replacement Procedure

Steps to replace fan: turn off power, wait for discharge.

External Fan Replacement (cont.)

Turning OFF Safety Units Before Fan Replacement

Turn OFF DC Safety Unit and AC breaker before fan replacement.

Appendix F: Replacing and Adding System Components

CAUTION! - DC Metal Panel Screws

Caution not to remove DC metal panel screws to avoid harming inverter sealing.

Replacing an Inverter

Steps for replacing the inverter, including safety checks and disconnections.

Replacing an Inverter (cont.)

Replacing the DC Safety Unit

Removing the DC Safety Unit

Steps to remove DC Safety Unit: disconnect wires and conduits.

Installing a New DC Safety Unit

Steps to install new DC Safety Unit: position and attach brackets.

Connecting DC Safety Unit to Inverter

Connecting DC wires (red/black) to DC+ and DC- terminals in the inverter.

Replacing the DC Safety Unit (cont.)

Connecting AC Wires to Terminal Blocks

Connecting AC wires according to labels on the AC terminal blocks.

Adding, Removing, or Replacing Power Optimizers

Safety Precautions for Optimizer Changes

Turn OFF inverter ON/OFF switch and wait for safe DC voltage.

WARNING! - Capacitor Discharge

Wait for capacitor discharge if inverter panel is not visible or malfunction indicated.

Performing Pairing Procedures

Perform pairing and other procedures after adding or removing optimizers.

Updating Optimizer Serial Number in Platform

Use Replace button in monitoring platform to update serial numbers.

Determining the Size of an Inverter Circuit Breaker

Inverter Circuit Breaker Sizing Method

Explains how to determine the rate of a circuit breaker next to an inverter.

Parameters for Circuit Breaker Sizing

Required parameters: inverter's max output current and country factor.

Calculating Inverter Circuit Breaker Size

Steps: multiply output current by factor and round up to standard size.

Circuit Breaker Selection Considerations

Consider rated voltage, temperature de-rating, and permanent load de-rating.

Determining the Size of an Inverter Circuit Breaker (cont.)

Table 1: Circuit Breaker Criteria

Table listing SolarEdge inverters and their recommended circuit breaker sizes.

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