KOSTAL BackUp Switch Quick Install Guide

Kurzanleitung zur Installation

Product Information

This document provides a quick installation guide for the KOSTAL BackUp Switch.

Manufacturer: KOSTAL Solar Electric GmbH

Website: www.kostal-solar-electric.com

Important Safety Information

Electric current - Danger to life! ⚡

This product must be installed and maintained by competent and authorised personnel only. Strict observance of any relevant standards and legal requirements is mandatory. The technical specifications on the switch label must not be exceeded.

German: Lebensgefahr durch elektrischen Strom! Dieses Produkt darf nur von kompetentem und autorisiertem Personal installiert und gewartet werden. Bei der Installation und Wartung sind die entsprechenden Standards und geltende gesetzliche Bestimmungen strikt einzuhalten. Die auf dem Etikett angegebenen technischen Daten sind maßgebend.

Step 1: Switch off inverter and battery

Ensure the inverter and battery are switched off before proceeding with the installation.

1. Turn the main switch to the 'OFF' position.

2. Ensure the battery is disconnected or in the 'OFF' state.

Visual representation showing the inverter and battery switches in the 'OFF' position.

Step 2: System overview / Installation / AC Connection

Consult your grid operator for the required connection variant.

Connection Variants:

N-separation, Neutral point treatment required (Sternpunktbildung gefordert)
No N-separation, Neutral point treatment not required (Sternpunktbildung nicht gefordert)

AC Connection Details:

For consumers in grid operation and backup operation:

AC Connection cross-section: Solid or stranded 6-16 mm²; Fine or stranded with ferrule 4-16 mm².

Check tightening torque of 1.8 Nm.

Description: Consumers in the backup mode branch are disconnected from the public grid. Consumers in the grid operation branch remain connected to the public grid.

Diagram: Shows a system with RS485 and Backup Signal connections, indicating consumer loads connected to both grid and backup operation branches.

For consumers in grid operation:

Description: Loads in the grid operation branch remain connected to the public grid. The inverter starts backup operation.

Diagram: Shows a system with RS485 and Backup Signal connections, indicating consumer loads connected only to the grid operation branch.

Wiring Specifications:

Max. 400 V / 63 A

AC Connection cross-section:

Ein- bzw. mehrdrähtig (Solid or stranded): 6-16 mm²
Fein- bzw. vieldrähtig mit Aderendhülse (Fine or stranded with ferrule): 4-16 mm²

Anzugsdrehmoment (Tightening torque): 1.8 Nm

Step 3: Open inverter

Follow the visual guide to open the inverter.

Visual representation showing how to open the inverter.

Step 4: Connecting the BackUp Switch signal line

Connect the signal line to the designated port (X402) on the inverter.

Diagram illustrating the connection of the BackUp Switch signal line to the X402 port, showing specific wire connections (e.g., Backup, MON, R, GND).

Step 5: Close inverter

Securely close the inverter after making the connections.

Visual representation showing how to close the inverter, indicating a torque specification of 1.5 Nm for closing screws.

Step 6: Switch on inverter

Turn the inverter and battery switches to the 'ON' position.

Visual representation showing the inverter and battery switches in the 'ON' position.

Step 7: Activate BackUp Switch in the inverter

After installation, the KOSTAL BackUp Switch must be added to the system via the 'Change operating mode' function within the inverter's service menu. This operation can only be performed by an installer.

Procedure: Navigate through the inverter's service menu to 'Operating mode' and select 'Change operating mode'.

Screenshots or visual representation of the inverter's service menu, highlighting the path to change the operating mode to activate the BackUp Switch.

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