Victron MultiPlus-II Inverter External Transfer Switch Manual PDF (EN)

Table of Contents

External Transfer Switch application Table of Contents 1. Introduction ........................................................................................................................... 1 1.1. Advantages .................................................................................................................. 1 1.2. Compatibility ................................................................................................................. 1 1.3. Hardware requirements ..................................................................................................... 2 1.4.

Grid code certification country list ......................................................................................... 3 2. Functionality .......................................................................................................................... 4 2.1. Single line diagram .......................................................................................................... 4 3. Installation ............................................................................................................................. 5 3.1. AC voltage measurement .................................................................................................. 5 3.2.

Current transformer ......................................................................................................... 5 3.3. Ground relay ................................................................................................................. 6 3.4. External transfer switch ..................................................................................................... 6 3.5. Ziehl relay .................................................................................................................... 7 4. Configuration ......................................................................................................................... 8 4.1.

Upgrade to S99 VE.Bus firmware ......................................................................................... 8 4.2. VE.Bus System configuration .............................................................................................. 8 4.3. MultiPlus(-II) configuration .................................................................................................. 9 4.4. Venus OS version ......................................................................................................... 10 4.5. GX device generator start/stop feature. ................................................................................. 10 5.

Troubleshooting .................................................................................................................... 11 6. Wiring diagrams .................................................................................................................... 12 6.1. General wiring diagram ................................................................................................... 12 6.2. Wiring diagram with added Ziehl relay .................................................................................. 13

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1.2. Compatibility

External Transfer Switch application 1. Introduction This manual provides instructions for installing and configuring a system using an external transfer switch (contactor) instead of the built-in relays of the MultiPlus-II or the MultiPlus 20kW. All compatible MultiPlus-II models including the MultiPlus 20kW are listed in the table below. This manual shall refer to this group as "MultiPlus(-II)". This application significantly enhances the versatility, cost-effectiveness, and reliability of larger systems, particularly those of 60kVA and above. 1.1. Advantages Reduce installation time and costs:

This reduces costs and installation time, especially for large systems with multiple MultiPlus(-II) units in parallel. It removes the need to wire each unit's AC input and output terminals. Reduce equipment costs: Combining MultiPlus-II 8, 10, or 15kVA units with an external transfer switch lifts their "no parallel" restriction. Otherwise, the more expensive Quattro 8, 10, or 15kVA units would have been required. Flexible installation: MultiPlus(-II) units and batteries can be placed up to 20 meters from the main distribution board without running power wiring back and forth. No Bypass Switch Required: Eliminates the need for a separate bypass switch. 1.2.

Compatibility See the table below for a list of MultiPlus and MultiPlus-II models which are supported by this application. Ensure that the MultiPlus(-II) model number and the first four digits of the firmware number match the MultiPlus(-II) model that you intend to use. You need to use a specific "External transfer switch firmware" with the s99 subversion number. These firmware files are available from https://professional.victronenergy.com/downloads/firmware/ . Key specifications: AC transfer rating: 100 or 400A. Unit limit: Up to 12 MultiPlus(-II) units, with a maximum of 4 per phase. System size: Up to 180kVA using MultiPlus-II units, or 240kW using MultiPlus 20kW units. AC input:

Supports only one AC input source. AC input type: Generator or grid AC input. For a full list of countries where grid connection is approved, see the Grid code certification country list [3] section.

Page 1 Introduction MultiPlus(-II) model Firmware number MultiPlus-II 48/6500/100-50 2602xxx-s99 MultiPlus-II 12/5000/220-50 2604xxx-s99 MultiPlus-II 24/5000/120-50 (+ EasySolar) 2615xxx-s99 MultiPlus-II 48/15000/200-100 2619xxx-s99 and 2684xxx-s99 MultiPlus-II 48/8000/110-100 2621xxx-s99 MultiPlus-II 48/5000/70-50 (ACOut2 switchable etc) 2623xxx-s99 and 2698xxx-s99 MultiPlus-II 48/10000/140-100 2627xxx-s99 MultiPlus-II 48/8000/110-100 2682xxx-s99 MultiPlus-II 48/10000/140-100 2683xxx-s99 MultiPlus 48/20000/250-100 2688xxx-s99 MultiPlus-II 24/5000/120-50 2696xxx-s99 MultiPlus-II 24/5000/120-95 120V (ACOut2 switchable etc) 2715xxx-s99 MultiPlus-II 48/5000/70-95 120V (ACOut2 switchable etc) 2723xxx-s99

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1.3. Hardware requirements

External Transfer Switch application Firmware: Requires application-specific VE.Bus firmware, version s99. Hardware: Additional hardware is required; refer to the Hardware requirements [2] list. 1.3. Hardware requirements External transfer switch: Standard contactor. Ground relay: High current single-pole relay. Ground help relay: Low-power 230V relay with a 24V coil, enabling the MultiPlus(-II) low-power control signal to drive the high-power ground relay. Victron Current Transformer(s): One per phase, rated at 100 or 400A, for accurate current measurement and power management. Four-pole circuit breakers and RCD: For circuit protection. Electrical wiring:

Refer to the Installation [5] chapter for detailed instructions. Ziehl UFR1001E relay: Required for certain grid-connected systems. Refer to the Grid code certification country list [3] to determine if it is necessary. Page 2 Introduction

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1.4. Grid code certification country list

External Transfer Switch application 1.4. Grid code certification country list The external transfer switch application has been tested and certified for grid-connected applications for the countries listed below. Note that certain countries require the addition of a Ziehl UFR1001E relay, while others do not.

Page 3 Introduction Country Certificate* Ziehl relay UFR1001E required Austria TOR Type A ver 1.3 - Belgium C10/11 ed 2.3 - Denmark TR3.3.1 Rev 5 - Europe EN50549-1:2019 Yes Germany VDE-AR-N 4105:2018:11 Yes Northern Ireland G99 Issue 1 Amd 1 (Dec 2023) - Poland PTPiREE Rev 1.2:2021 - South Africa NRS 097-2-1:2024 Yes Spain UE2016/631 UNE217002:2020 - United Kingdom G99 Issue 1 Amd 10 - *) The certificates can be accessed on our website. MultiPlus-II: https://www.victronenergy.com/inverters-chargers/multiplus-ii#downloads-certificates MultiPlus: https://www.victronenergy.com/inverters-chargers/multiplus-12v-24v-48v-800va-3kva#downloads-certificates

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